In modern, surround sound driven audio universe where home theater enthusiasts hear airplanes fly overhead and bombs exploding around them, one might think that mere Stereo is old fashioned. But don't be mislead - humans have only two ears and stereo is still a significant life form.The case in point: the RX-4105. It's actually an update of the market leading RX-4100/4103. Rated at 100 watts, Sherwood Electronic has reduced distortion significantly. It's now less than 0.20% from 20 Hz to 20 kHz. The RX-4105 has a good AM/FM tuner with the ability to pre-set up to 30 favorite stations. It has inputs for 4 audio sources to accommodate your sound gear. And the sound is phenomenal - as you'd expect from a company that dates its own existence to before stereo's birth.And the RX-4105 has at least one unexpected grace: the ability to independently select up to two sets of loudspeakers via the supplied remote control. (Audio purists will be pleased to know that this relay-controlled switching puts the speakers in parallel, maintaining their individual sound qualities.)

Sherwood's incredibly affordable RX-4105 offers integrated preamplification and amplification, inputs for numerous audio source components, and advanced radio tuning and station access. The receiver delivers 100 watts RMS per channel x 2 for strong, clear sound across the audible spectrum--even at low listening levels. The company has lowered the amplifier's distortion relative to the previous model (the RX-4105), to less than 0.08 percent, while also giving the receiver a new layout borrowed from its higher-end components.

The RX-4105 uses totally discrete amplifiers for all channels (TDAS) to maintain its high power and low distortion. Use the receiver's A and B clip-type speaker outputs to power 2 different rooms, or to biwire a pair of speakers for more efficient amplification (with A outputs driving the woofers, for instance, and the B outputs driving the tweeters--make sure your speakers are compatible if this is a key feature for you).

The receiver also offers a handy 25-key remote control and switching for 2 pair of loudspeakers. Audio inputs switch between and amplify up to 4 additional components, including 2 requiring both inputs and outputs (such as a cassette deck and a VCR). The built-in AM/FM tuner features 30 station presets and auto station setup.

Other features include bass and treble tone controls, a dimmable fluorescent display, and a .25-inch headphone jack for private listening.

What's in the Box
Sherwood RX-4105 receiver, remote control, AC power supply cord, FM indoor antenna, AM loop antenna set, and owner's manual.

Ideal for audiophiles who like to build their systems piece by piece, the Teac TR-670 offers precise, high-end AM/FM tuning so you can enjoy your favorite programs static-free. The tuner is equipped with such features as direct-access tuning to the station frequencies or the 60 memory presets, manual or auto tuning for easy programming, and a multifunction fluorescent display that shows the station info clearly. Among the 60 presets are 30 AM and 30 FM channels, which should cover virtually the entire radio dial in all but the busiest markets. Plus, the tuner offers a digital clock with a 90-minute sleep timer function (in 10-minute increments)--a perfect fit for nappers. And should the power go down, the tuner's preset memory backup keeps all the information current so you don't have to reprogram it later.

The tuner offers control from either the unit face or via the included remote control. In addition, at 17.13 by 3.46 by 11.3 inches (W x H x D) and 8.38 pounds, it should fit easily within most component setups. An optional rack mount kit is also available.

What's in the Box
TR-670 tuner, remote control, user's manual.

NOTE! THE TEAC T-R670 AM/FM TUNER IS A RADIO THAT MUST BE CONNECTED TO AN AMPLIFIER AS PART OF A STEREO COMPONENT SYSTEM. Up to 90minute Sleep Timer Function (adjustable in 10-minute segments) Timer On/Off & Clock Function Full Function Remote Control Power Requirements - 120 to 230 VAC, 50-60Hz Optional adapter for rack mounting, available at extra cost Approximate Size - 4 High x 17 Wide x 11 Deep

A terrific choice for a remarkably affordable system upgrade or building block, the AudioSource Amp 200 high-current stereo power amplifier offers 80 watts RMS per channel x 2 or, in bridged mono mode, up to 250 watts x 1 (into 8-ohm speakers in both cases). Now you can scale your listening to match your budget: use either 1 amplifier or 2 for stereo sound or 5 or more in concert for full-blown home-theater excitement--perfect for your DVDs, multichannel DTV broadcasts, or high-resolution audio formats like DVD-Audio and SACD.

Keep in mind that this is an amplifier only, with no volume control or onboard surround processing (though it does offer independent adjustable output controls for each channel). It's designed for use with a stereo preamplifier or a surround receiver offering preamplifier outputs.

Making the move from 5.1- to 6.1- or 7.1-channel surround sound? If your receiver has preamp outputs for all channels, there's no need to replace your 5.1 surround receiver. Just feed the additional center or surround signals to a strategically positioned Amp 200.

Connections consist of a choice of RCA (line-level) or clip-type (speaker-level) inputs and banana-plug-friendly binding-post speaker terminals for outputs. There's also set of stereo (left/right) RCA passthrough jacks for use in a daisy-chain setup.

The amp works with 12-volt power-on/-off circuitry and also features a signal-sensing circuit for automatic power-on/-off, making it as ideal for custom installers as for end users. Its A and B speaker outputs let you power speakers in your main room, a second room, or both rooms simultaneously. The amplifier's toroidal power supply keeps distortion extremely low (less than 0.04 percent).

200 Watts Power Bridged / 80 Watts per Channel x 2 Channel Stereo / Use as Remote amp for single or dual zone / A/B Speaker Select Stable into 2 ohm loads

Home theater may be the rage, but there's no getting around the need for affordable, high-quality music playback, and Sony's STR-DE197 stereo receiver can be a huge help in that department. The integrated amplifier pumps out 100 watts per channel across both its 2 channels and uses discrete output transistors--that is, transistors in place of cheaper and lower-quality integrated-circuit chips--to ensure high-quality music presentations.

The receiver features an FM/AM tuner with 30 station presets (20 FM, 10 AM) and a UniCommander remote control with phosphorescent glow keys for easy access, even in the dark. Separate A and B speaker outputs (stereo left/right) let you listen to the same program across two sets of speakers placed in different parts of the house.

There's no phono input, but the unit's 4 stereo analog audio (left/right RCA) inputs accommodate, for instance, a cassette deck, a VCR, your cable-box outputs, or a DVD player. (Make sure your television has sufficient inputs for the number of video sources whose audio you plan to route through the receiver.) A bass-boost circuit enhances your program's low frequencies for greater musical or cinematic input.

A switched AC outlet lets you plug another device into the receiver, conserving wall sockets and powering up the plugged devices at the same time as the receiver. When the receiver powers on and off, so also will the component plugged into the power outlet, provided you leave its power set to "on." Listening at night? Plug into the receiver's .25-inch headphone jack so you won't wake the family or neighbors.

What's in the Box
Receiver, RM-US185 UniCommander remote control, remote batteries (2 AA), FM wire antenna, AM loop antenna, user's manual, and warranty information.

Sony's worldwide reputation for creating unique, attractive, high-quality, advanced technology products rests on a long line of innovations embraced by people from all walks of life. With a diverse product lineup serving a variety of lifestyles and industries, Sony continuously strives to introduce new products and technologies to meet changing market needs.PRODUCT FEATURES:Stereo Receiver;100 Watt x 2 power output;RDS Tuner with 30 presets;A/B, A+B speaker selector;Tone control;Remote control.

Enjoy full-bodied two-channel sound without breaking the bank with the Teac AG-790 stereo receiver. Equipped with 200 watts of total output power at 8 ohms (100 watts x 2), the AG-790 offers an affordable means of driving your left and right speakers to produce crisp, commanding audio. Among the receiver's audio features are a discrete circuit configuration that separates the audio signals for greater clarity; A/B speaker selection, which lets the listener choose an alternate pair of speakers; and binding post speaker terminals that provide a pure, high-quality connection.

As with many receivers, the AG-790 also boasts a quartz PLL-synthesized AM/FM tuner with 30 AM and 30 FM presets. Thanks to the tuner, listeners can easily locate their favorite stations or browse among the dozens of presets (enough for virtually any size market). Users also have the choice of using the manual or auto-tuning. Other add-ons include a multifunction fluorescent display, a front-panel headphone jack for private listening, and a full-function remote control. The receiver measures 17.12 by 5.47 by 13.19 inches (W x H x D) and weighs 21.2 pounds.

What's in the Box
AG-790 receiver, remote control, user's manual.

Around the world, the TEAC name is synonymous with high-quality, high performance consumer gear - not surprising when you consider that TEAC has been a leader in the industry since its earliest reel-to-reel recorders. Today, TEAC manufactures an entire spectrum of components for both high-fidelity audio systems and digitally enhanced home theaters. For many audiophiles, the TEAC label is a symbol of pride, one that shows they are serious about audio quality. Industry experts share this enthusiasm for TEAC products, giving them consistently high marks for performance.PRODUCT FEATURES:5-input selector: tuner, CD, tape, phono, AUX;Quartz PLL synthesized tuning system;Multi-function fluorescent display;Front panel headphone output Bass, treble, balance controls;90-minute sleep timer;30 FM/AM station presets;Remote control.

JVC RX-8010V features premium performance with its high current power supply capable of handling 4 ohm loads, and a new high performance Motorola DSP. The new 24-bit DSP is capable of executing 150 million instructions per second (MIPS). This DSP power enables RX-8010V to provide the highest level of accuracy in decoding Dolby Digital and DTS movies. It also makes possible all-channel stereo, and the JVC exclusive DAP sound field. The headphone DSP mode can create the stereo sound as if you listen through the speakers while listening to a source using headphones. So you can feel as if you were in a music room. This mode can be used only when both of the front speakers are.When you press the play button on a connected component or on its own remote control, the receiver automatically turns on and changes the source to the component. On the other hand, if you select a new source on the receiver or on the remote control, the selected component begins playing immediately. In both cases, the previously selected source continues playing without sound for a few seconds. RX-8010V also allows you to play your MP3 files directly from your PC through a front USB input. This new flexibility allows you to play music recorded on your computer with the greatest fidelity.

Experience the astounding sound of Sony's STR-DE685 receiver. Packed with 100 watts x 5 and 100 watts x 2 of system power, this receiver is perfect for your sound system. Features include an A or B speaker switch, 2 component video inputs, a preprogrammed remote commander control, 32-bit Dolby Digital, Dolby Pro Logic II and a DTS decoder/DSP. Listen to the Digital Cinema Sound system with Cinema Studio EX modes at work, and utilize features like the 9-function input selector, and the 5.1-channel input for new high-resolution multi-channel audio sources such as SACD. You won't believe what you hear! Also make use of the 3 optical digital inputs - 1 output, coaxial digital input, 3 S-Video inputs - 1 S-Video output, a Control A1 II interface, and a subwoofer output. You have yet to experience sound quite like this... Rediscover the sound of Sony with the STR-DE685.

The AVR 325's seven-channel amplifier has all the muscle needed for the most demanding digital soundtracks, while an EzSet remote and comprehensive menu system make setup easy. All the popular surround modes are available, along with assignable rear-channel amplifiers, an RS-232 port and a standard Zone II remote for the multizone system.

Panasonic's vision of the digital future is driven by the needs and aspirations of its business customers and millions of consumers around the world who use its products every day. The company shares their dream to live a fuller life by providing ways of working smarter and enjoying the rewards of technological advances.

So you've got the surround sound...so you think! Did you know there are codes within movie videos and even TV dramas? If you have a system that can read those codes, then BAM! You've got a soundtrack! The code amplifies the true surround sound capabilities that the movie has in the theater. It's not just your system, it's what the director had in mind! Plus, Sony kicks it up a bit by returning the surround sound control to you, with equal power to all five channels: Left, Right, Center, Left-Rear and Right-Rear get the same power output, which you need for theater-quality Dolby Digital and dts multi-channel surround sound. Also, some home theaters give up surround control. But with this surround sound YOU retain comprehensive control.

This tuner offers 4-ohm/8-ohm switching, which enables reliable operation with low-impedance speakers, and discrete output transistors that offer high-speed, high-current capacity and low distortion. The tuner has equal power to all five channels, meaning that left, right, center, left rear, and right rear all get the same power--important for theater-quality Dolby Digital and DTS multichannel surround sound. Dolby Pro Logic decoding brings home all the excitement and emotional impact of movie soundtracks. The system decodes and amplifies the surround channels already encoded in many movie videocassettes, TV dramas, and sports broadcasts. The tuner also features a fluorescent display and AM/FM random presets that store AM and FM stations in any combination. The preprogrammed remote lets you operate many types of non-Sony equipment.

The center of your stereo system is the receiver. It should be equipped with channels-driven stereo-mode output, discrete output transistors and enough input/output jacks to accommodate your whole system. This audio/video receiver comes with a preprogrammed remote control and 30 AM/FM random presets. But only if you're ready to receive.

Kenwood's goal has always been to develop and offer a carefully planned range of the highest quality audio products to give you the maximum freedom to enjoy the purest, cleanest sound possible across the widest variety of Hi-Fi applications.Today, as we enter the digital era, you can depend on Kenwood innovative products and remarkable advances to bring out the full potential of breakthrough technologies. For those who believe that great sounds are not a luxury, but one of life's essentials, Kenwood will continue to play an important role in unparalleled audio performance, functionality and design.

Brace yourself for the superior sound Sony's STR-DE975 delivers. Packed with features, this receiver rocks! Features include Multi-room Audio Output with independent source selection, a Preprogrammed and learning remote control with macros, a 32-bit Dolby Digital, Dolby Pro Logic and dts decoder, a 32-bit DSP with 27 acoustic environments, and a Digital Cinema Sound system with Cinema Studio EX modes. You want entertainment? Drop the STR-DE975 in your virtual shopping cart today.

The HTR-5540 AV receiver puts high-end home theater well within the grasp of affordability, offering the convenience of DVD-Audio-ready six-channel analog inputs alongside the latest 6.1-channel surround processing and premium Yamaha sound technologies.

When hooked up with the digital-audio output from a DVD-Video player or digital satellite receiver, the 75 watts-per-channel HTR-5540 handles 5.1-channel surround decoding for both major formats, Dolby Digital and DTS. In addition, the HTR-5540 processes Dolby Digital EX and DTS-ES, which create an even more expansive soundfield through the use of a center-rear surround channel, totaling six discrete full-range channels in addition to the LFE (low-frequency effects) channel: left, center, right, and left, center, and right surround.

Non-Dolby Digital and DTS sources can benefit from surround processing, too. With enhanced directional steering over standard four-channel Dolby Pro Logic, Dolby Pro Logic II provides five channels of surround processing from any stereo source--whether that's a TV broadcast, VHS tapes, or your favorite CDs, cassettes, and LPs. Pro Logic II delivers full-bandwidth stereo surround channels with 40 dB of left-right separation.

A key benefit from a Yamaha receiver, of course, is Yamaha's proprietary signal processing, including Cinema DSP (digital soundfield processing), which creates aural "imaging" that not only makes your home sound like a theater, but also sounds better than most movie theaters. Based on a wealth of measured data in studios and halls, Cinema DSP is designed to bring out the full potential of movie sound mixes, reproducing them the way directors and sound engineers intended.

And, when you're listening to multichannel presentations late at night, you'll appreciate Silent Cinema, which simulates 5.1-channel listening through a pair of ordinary 2-channel headphones (not included). Silent Cinema uses unique parameters for each soundfield to ensure accurate headphone representations of each soundfield.

Then there are the six-channel DVD-Audio-ready inputs mentioned above. "If DVD-Audio is so high-tech," you might wonder, "why do I need analog inputs to appreciate it?" You need them because, for reasons of data density, DVD-Audio players perform their own digital-to-analog conversion, passing high-resolution analog signals on to your amplifier. (And analog is, after all, what your amp feeds your speakers.)

DVD-Audio can deliver up to six channels of discrete, full-frequency sound at greater-than-CD resolution (24 bits, 96 kHz sampling rate versus 16 bits, 44.1 kHz for CD), and some discs will exploit the chance to offer an ultra-high-resolution, stereo-only 192 kHz sampling rate. In stereo or surround, the sound from DVD-Audio is packed with detail, yet it's smoother and sweeter than the sound from even the best standard CD players. The HTR-5540 accommodates decoded DVD-A signals and routes them to the appropriate speakers in your surround system.

The versatile unit offers five video input connections (with four S-video inputs), five fixed and assignable digital-audio inputs (great for DSS, CD, laserdisc, gaming consoles, and minidisc), and front-panel input connections for your camcorder or other spontaneous hookup. The HTR-5540 comes with a preset remote control.

Finally, the HTR-5540 benefits from Yamaha's Digital ToP-ART (Total Purity Audio Reproduction Technology) build philosophy. ToP-ART's goal is to maximize digital quality while minimizing analog circuitry. The culmination of the best digital engineering and design possible, it brings together several key elements to create the best-sounding, easiest-to-use A/V components available.

The JVC RX-6000VBK is ready for state-of-the-art surround sound processing with built-in Dolby Digital and DTS Surround Sound decoding. This receiver features 100 watts x 5 min. (two front, one center, two rear speakers) RMS, both channels driven into into 8 ohms, 1kHz, 0.8% THD. Digital Acoustics Processor (DAP) with five preset sound fields (Theater/Hall/Live Club/Pavillion/Dance Club) digitally recreates these venues in your own home. AV COMPU LINK provides simple one touch operation between your JVC audio and video components. To connect the latest in digital audio sources, JVC provides two assignable digital inputs (one optical and one coaxial) for additional audio enjoyment.

Today's audio-video receivers incorporate more performance features than older receivers and they often do so at a better price. JVC's RX-6000VBK is an example of this trend. It decodes both Dolby Digital and DTS 5.1-channel surround, performs S-video switching, and delivers 100 watts across five channels--as well as offers six DSP modes for music and movies and a whopping 45 FM/AM station presets. The RX-6000VBK also has sophisticated control settings such as a variable crossover and a bass-management system, which will maximize the performance of any home-theater speaker system.

The RX-6000VBK gets things off on the right foot with its intuitively arranged front panel. A larger-than-normal display window dominates the top half of the faceplate, while directly beneath it sit large, bar-shaped buttons for selecting sources, DSP (digital signal processing), and surround modes. Perhaps best of all, we like JVC's multifunction cursor, which controls bass and treble, subwoofer level, balance, speaker settings for surround, speaker delay settings, crossover frequency, dynamic range, and tuner presets. You also use it to assign digital inputs to the components of your choice.

We're pleased that the RX-6000VBK offers S-video switching (DVD only, not for VHS) and coaxial as well as optical digital-audio inputs. We prefer coaxial and recommend you use this input for your DVD player, providing you have the output to match.

On the downside, the RX-6000VBK lacks a front-panel video input, which is handy if you're a serious camcorder user. Another feature absent is 5.1-channel direct analog inputs--probably a tradeoff to maintain the low price. Since the receiver offers Dolby Digital and DTS decoding, this isn't a serious liability, but multichannel inputs offer the security of accommodating future surround formats.

The RX-6000VBK's sound is clear, with a generally good balance, though it does veer slightly toward emphasizing the midrange and treble and has a tight if lean bass response. It successfully resolves instrumental textures and ambient cues. Through the RX-6000VBK, vocals sound precise and articulate, something we always welcome with music and something obviously important with DVD movies as well. Finally, JVC's Compu Link lets you control other JVC components with the RX-6000VBK's remote.

All in all, this is a fine receiver. While it lacks 5.1-channel direct inputs, it does have top-of-the-line DTS decoding, S-video switching, and a coaxial digital input. At this price, it's a strong value. --Wayne Garcia

Pros:

• Clean, open sound
• S-video switching
• Coaxial digital input
• Controls are easy to navigate

Cons:

• No 5.1-channel inputs
• No front-panel video inputs

JVC's RX-6000VBK Dolby Digital/DTS surround receiver provides 100 watts per channel to all five main channels and has an AM/FM tuner with a memory for 30 FM and 15 AM stations. Assignable optical and coaxial digital audio inputs provide flexibility for hooking up devices such as a DVD player, a CD player/recorder, or a minidisc player/recorder.

Dolby Digital and DTS surround decoding give you five full-range channels and a subwoofer channel (the ".1"), letting you enjoy the most spectacular theater sound at home when you are watching movies and television broadcasts (or when listening to DTS 5.1-channel surround CDs).

Dolby Pro Logic produces left, center, right, and monaural surround information from countless VHS tapes, DVDs, and TV broadcasts. The RX-6000VBK also offers 3D-Phonic virtual surround sound (which simulates surround through only two speakers) and five of JVC's own Digital Acoustic Processor surround settings.

Electronic bass and treble controls allow you to customize the sound to your liking. The JVC RX-6000VBK has enough audio-video inputs and outputs to hook up a video game system, a second VCR, or a camcorder. This receiver also includes S-video hookups for DVD and video game addicts.

JVC's Compu Link feature lets you run your entire home theater with the included remote control.

JVC offers a two-year warranty on parts and labor.

Sony's worldwide reputation for creating unique, attractive, high-quality, advanced technology products rests on a long line of innovations embraced by people from all walks of life. With a diverse product lineup serving a variety of lifestyles and industries, Sony continuously strives to introduce new products and technologies to meet changing market needs.

The Yamaha HTR-5840 is a full-function, high-power 600W (100W x 6RMS) 6.1 channel receiver with special features like Quad-field CINEMA DSP, Night Listening Enhancer, and is XM Satellite Radio ready.

Amazon.com Product Description The Yamaha HTR-5840 XM-ready digital hometheater receiver is a full-featured digital home theater receiver that sports some serious features. In addition to 6.1-channel discrete amplification (100 w x 6 RMS), the HTR-5840 features Yamaha's Digital ToP-ART (Total Purity Audio Reproduction Technology) amplifier design concept that ensures the highest signal purity and 14 surround programs. Also featured is Silent Cinema, Yamaha's exclusive technology that allows private listening enjoyment of multichannel music or movie sound, including Dolby Digital and DTS Digital Surround.

The receiver delivers high power to six channels and features Yamaha's unique Cinema Digital Sound Field Processing, or DSP--Yamaha's way of recreating the ambiance of a stadium, a concert hall or an intimate club in the comfort of your own home. The HTR-5840's digital-to-analog converters use an extremely high performance 192 kHz/24-bit operation type. On top of all this, the HTR-5840 has excellent, high-quality two-channel and multichannel surround reproduction, and it reproduces surround for 5.1 channels and 2.1 (virtual surround). The HTR-5840 is also XM Satellite Radio-ready, which means that with an addition of an XM Connect-and-Play and XM subscription, you can tune into your favorite XM broadcasts.

Click to view the Yamaha HTR5840's connections.

With 14 different sound programs that provide multiple variations, every movie and every piece of music will sound right in your home theater. Discrete power transistors, rather than chips, are used in the amplifier section to provide the cleanest sound possible. The amp delivers 100 watts each to seven channels.

For connectivity, the HTR-5840 includes S-video inputs, three digital and two component video inputs, and a set of front panel A/V inputs for simple temporary connection. The receiver also features an AM/FM digital tuner with 40 station presets.

What's in the Box
HTR-5840 receiver, remote control, batteries, AM antenna, and FM antenna.

	XM Connect-and-Play Basics
What is the XM Connect-and-Play antenna?	The XM Connect-and-Play is required for "XM Ready" receivers to receive XM programing. It integrates an XM receiver and antenna unit into one device.
How does it work?	The Connect-and-Play antenna sends the digital radio signal to your XM Ready audio system via a single, plug-in cable.
Do I need anything else?	No. If you have an XM Ready receiver and the Connect-and-Play, you're set. XM service does require a subscription.

The STR-DE845 has the power and processing to get the best out of your source - whether it is a DTV or DSS broadcast, DVD, or a simple VHS tape. The STR-DE845 incorporates Dolby Pro Logic, Dolby Digital and DTS decoding, and with Sony's exclusive Digital Cinema Sound system-makes your movies sound exactly the way they were meant to be.Bring state-of-the-art digital cinema into your home with the feature-packed STR-DE845. 24-bit processor gives you super-precise Dolby Digital and DTS decoding, while a separate 32-bit processor handles Sony's exclusive Digital Cinema Sound - soundfield circuitry based on acoustic measurements made at Sony Pictures Studios movie production stages. You'll hear movie soundtracks the way the producers and directors intended it to be heard. There are 27 different DSP modes in all.

Seize the superb sound of Sony's STR-DE485 receiver. Packed with features that will make your entertainment system boom, this receiver will rock your listening room the moment you press power. Features include 32-bit Dolby Digital, a Dolby Pro Logic and DTS decoder, 5.1-channel input, 32-bit digital signal processing with acoustic environments, and 80 Watts x 5 of system power. The front panel design is bound to complement your components. So utilize its easy setup and listen to Sony's sound-enhancing features go to work. The STR-DE485 is the perfect addition to your entertainment system.

Sony STRDA3000ES Home Theater receiver does not simply accommodate the latest in digital entertainment. It takes it to the next lever. Dolby Digital EX 6.1-channel decoding, dts ES decoding, 7.1-channel inputs and Digital Signal Processing overwhelm you with effortless multi-channel sound. Literally "concert hall" in Dutch, Amsterdam's Concertgebouw is a landmark to music lovers the world over. Its acoustics are faithfully reproduced along with other famous movie theaters and concert halls by the STRDA3000ES.

The STR-DE835 is the best example we've seen of a home-theater product that uses recent technological advances to deliver great quality and features at a near-budget price. With this model, you get decoding for all major surround-sound formats (Dolby Digital, Dolby Pro Logic, and DTS), 5.1-channel analog inputs to accommodate the use of an external decoder for these or other surround formats, inputs for four video and three audio sources (including a phono or turntable input), three optical inputs and one coaxial digital input, and a host of Sony-developed surround modes for processing one- or two-channel program material.

The flip side of using a powerful, full-featured surround amp is often a detailed, head-scratching setup process. The STR-DE835 can go both ways. To get it up and running is a very simple matter: plug in your components, select which source to watch or listen to, and sit back and enjoy its 100-watt-per-channel sound. A button found on both the front panels and the nearly full-function remote labeled "2CH," or two-channel, is your ready-made shortcut to auditioning straight, unprocessed left/right stereo from any of your input sources.

When using the digital inputs, the receiver automatically selects the correct listening mode for the incoming signal (DTS, Dolby Pro Logic, and any of the variants of Dolby Digital). With certain components, however--such as DVD and possibly CD--you may wish to use both analog and digital outputs. While surround-sound signals such as Dolby Digital and DTS tend to be transmitted digitally and decoded by the receiver, certain music-oriented DVDs have high-resolution digital content (with 96-kHz/24-bit signals) that require digital-to-analog (D-to-A) conversion upstream from this surround receiver (and most others). When listening to these sources--or to CD players with higher-caliber D-to-A conversion than this receiver employs--it's best to listen through the analog, rather than the digital, outputs of your source components.

This brings us to the only real drawback of the remote: while you can use it to switch between different components, you can't cycle through the different inputs for any one component. The remote (Remote Commander RM-PP402) is otherwise well designed and controls a host of Sony and non-Sony products.

More advanced operations require careful perusal of the STR-DE835's well-written manual, and configuring the surround modes is one of them. An internally generated test tone helps adjust the relative levels of the center and surround channels (which you can do right from your listening position). To compensate for the fact that the center channel is often slightly closer to the listening position than the left/right main speakers, many receivers let you delay the sound from the center channel to keep it aligned with the sound arriving from the other front speakers. The STR-DE835 doesn't let you do that, but it does let you tell it how far you're sitting from each of your speakers, and it makes the appropriate internal adjustments for each.

This unit boasts 27 surround modes (reverberation settings traditionally titled Hall, Stadium, or even Jazz and Rock), and Sony's Digital Cinema Sound puts other units with this feature to shame. First, the STR-DE835 contains real surround modes; the music plays in front and reverberates through each speaker in your surround setup. Second, Sony allows you to adjust the parameters of many of the sound fields, including aspects such as effect level, wall type, and screen depth. This degree of user control extends into other areas as well: The STR-DE835 offers dynamic-range compression for minimizing volume peaks (for quieter night viewing or listening), and you can adjust the amount of compression the unit employs.

As to sound quality, the receiver boasts a wide and detailed soundstage with no tizz (displeasing peaks in the voice range) or glare (broad overaccentuation) in the high frequencies. Discrete output transistors provide the receiver with high-speed, high-current capacity and keep distortion to a minimum. The unit also delivers good low-level support for the bass. Small increments in the volume control from the remote are perfect for when you want the sound level just a touch louder or quieter. And it's always nice to see a phono stage in modern receivers, and the one aboard the STR-DE835 is of higher quality than many.

The unit's only other drawback that its speaker terminals are of unequal size. This might not be an issue for you, depending on your speaker cables, but if you already own standard-size banana-plug-terminated cables, you'll be disappointed to find that the center and surround terminals are too small for your plugs. Stick with bare-wire cables or use small banana plugs on this one.

Tuning will likely require use of the supplied antenna, but beyond that, setting (and naming) the preset stations is simple. The STR-DE835 can automatically scan stations or you can enter them by frequency (e.g., FM 103.7). You can set up to 30 presets, divided between AM and FM, using either of the above methods.

In all, the STR-DE835 is a nothing short of a marvel of modern technology. If you're into features and flexibility, this receiver has your name written all over it.

Pros:

• Amazing features for the price
• Great sound
• Abundant processing power
• Future-ready design

Cons:

• Speaker terminals are unequal in size
• Remote does not perform all essential functions
• Learning curve for using all the features

This well-stocked AV receiver offers Dolby Digital and DTS 5.1-channel surround decoding, 5.1-channel analog inputs, Dolby Pro Logic decoding, and up to 100 watts per channel (maximum) with equal power across all five main channels. You can select between 4- and 8-ohm outputs to accommodate low-impedance speakers, and the model employs state-of-the-art 24- and 32-bit digital signal processing (DSP) with 27 other equalization and surround modes (what Sony calls "acoustic environments"). There's variable surround effect level and delay times for managing the surround options and discrete output transistors for better- quality amplification. With 4 audio inputs (including phono), 4 AV inputs (including 2 S-Video), and 3 AV outputs, the STR-DE835 should be able to handle switching for just about any system. This model weighs 27.5 lbs.

Sony's STR-DE835 A/V Receiver employs Dolby Digital and DTS decoding for incredible theater like surround sound in your home. Sony's Digital Cinema Sound system also provides the adjustments necessary to customize sound to your own listening environment. This home theater powerhouse provides 100 watts to each of its five channels which means you won't be asking for more power anytime soon. Discrete output transistors provide for low distortion for less background noise during those quiet movie moments. 5.1-Channel inputs, S-Video inputs/outputs, four digital inputs and a pre-programmed remote control complement the back panel.

High performance and high quality are paramount with JVC's flagship receiver. The RX-DP10VBK uses zero-interference technology to ensure high quality. This technology uses separate block construction to eliminate any interference, dual heat sinks and separate transformers for analog and digital circuits - all incorporated to remove any interference within the receiver. This receiver also takes advantage of the use of a C.C. Converter and a 24-bit/192-kHz P.E.M. D.D. D/A converter to reproduce any CD or DVD signal the way it was intended to be heard. The RX-DP10VBK also has multi-room/multi-source capabilities, which allow you to watch or listen to 2 different video or audio sources in 2 different rooms with the use of its IR/RF remote control. Finally, this THX Ultra-certified receiver has THX surround EX Decoding built in with 7 independent amplifiers making this exceptional receiver the cream of the crop.

The JVC RX-7030VBK features premium performance with high current 110 WATT x 6. This receiver also incorporates new convenience features such as Virtual Surround Back and Quick Speaker Set-up. The DSP processor enables the RX-7030VBK to provide the highest level of accuracy in decoding Dolby Digital EX and DTS-ES and Dolby Pro Logic II. It also makes possible All Channel Stereo, and the JVC exclusive DAP soundfield. Finally, the RX7030VBK comes with HD component switching to allow the user to take full advantage of the switching capabilities even with HD signals.

If you're considering setting up a home theater, this is the place to start. Onkyo's TX-DS575 demonstrates what home entertainment is really all about. With 70 watts of breathtaking clarity, power and precision. Equipped with fully attractive features like DTS, Dolby Digital and Dolby Pro Logic, this system offers unsurpassed stereo sonic performance that should satisfy even the most fastidious music listener.

The Harman AVR 65 Audio/Video Surround Sound Receiver utilizes the Crystal Circuit for the most advanced digital signal processing, including Dolby Digital and DTS. The AVR 65 provides a combination of power, performance and control unmatched by any other brand. It provides high current capability (+/- 35 amps) and ultrawide-bandwidth (8Hz - 80kHz) amplifier design for maximum performance from digital and analog sources. The AVR65 provides a combination of power, performance, and control unmatched by any other brand.

Harman Kardon's top-of-the-line AVR65 surround receiver is a shining example of HK's long-standing tradition of mating useful, creative features with outstanding sonic quality.

The AVR65 delivers knock-out dynamics, delicate imaging, deep bass, and clear, extended high frequencies, showing sincere consideration for stereo devotees and home-theater enthusiasts alike. And with nearly every known home-theater convenience on board--from Dolby Digital and DTS surround processing to bass-management and six-channel analog inputs for current and future surround formats--the AVR65 ranks among the best available surround receivers.

Setup, ever an issue with home theater, proved relatively painless with the AVR65. Rear-panel inputs and outputs are all clearly marked, and--unlike some surround receivers--most essential functions can be accessed through front-panel controls rather than merely through the remote. The remote can control many other non-Harman products in addition to the AVR65, but it takes a careful reading of the well-written manual to set this up.

The AVR65 automatically senses the type of digital surround encoding in use and adjusts to accommodate it. One caveat about the digital processing is the 48kHz limitation on the digital input. If your DVD player can output sampling rates up to 96kHz (the DVD-video maximum), this output will not be usable with the AVR65. However, the AVR65 does offer six-channel analog inputs to accept decoded digital signals from DVD-video or the coming 192kHz, 24-bit DVD-audio format.

To further "future-proof" the AVR65, Harman has designed the model with two other unique analog features: High Current Capability (+/- 40 Amps) and Ultrawide Bandwidth (8Hz - 80kHz). Because loudspeaker impedance (the inherent resistance to the incoming voltage) varies with frequency, the amplifier may need to deliver, at moments, up to six times the current load required for the speaker's impedance rating; the AVR65's High Current Capability does just that. Harman's Ultrawide Bandwidth offers linear frequency response to around 80kHz, well beyond the range of human hearing. This reduces undesirable phase shifts within the audible spectrum and increases "headroom," the amplifier's ability to reproduce complex, dynamic transients (such as cymbal crashes) with greater accuracy. The benefits of these features came through clearly in our testing.

Other features of the AVR65 include a bass-management system, six-channel analog preamp outputs, an Advanced Crystal DSP circuit with additional fancy surround processing, an on-screen control system, multiple AV inputs (including S-Video), a multiroom control system, and all-discrete amplifier circuitry.

Pros:

• Easy to use
• High-quality sound
• Multiple surround configurations
• Future-ready design

Cons:

• When manually fading out, the volume control cuts to silence unnaturally early
• No dedicated level control for headphone jack

The best value in audio/video receiver technology available. The AVR 65 utilizes the Crystal Circuit for the most advanced digital signal processing, including Dolby Digital and DTS. The AVR 65 provides a combination of power, performance, and control unmatched by any other brand.

The HTR-5560 AV receiver puts high-end home theater well within the grasp of affordability, offering the convenience of DVD-Audio-ready six-channel analog inputs alongside the latest 6.1-channel surround processing and premium Yamaha sound technologies.

When hooked up with the digital-audio output from a DVD-Video player or digital satellite receiver, the 75 watts-per-channel HTR-5560 handles 5.1-channel surround decoding for both major formats, Dolby Digital and DTS. In addition, the HTR-5560 also processes Dolby Digital EX and DTS-ES, which create an even more expansive soundfield through the use of a center-rear surround channel, totaling six discrete full-range channels in addition to the LFE (low-frequency effects) channel: left, center, right, and left, center, and right surround.

Non-Dolby Digital and DTS sources can benefit from surround processing, too--with enhanced directional steering over standard four-channel Dolby Pro Logic, Dolby Pro Logic II provides five channels of surround processing from any stereo source--whether that's a TV broadcast, VHS tapes, or your favorite CDs, cassettes, and LPs. Pro Logic II delivers full-bandwidth stereo surround channels with 40 dB of left-right separation.

A key benefit from a Yamaha receiver, of course, is Yamaha's proprietary signal processing, including Cinema DSP (digital soundfield processing), which creates aural "imaging" that not only makes your home sound like a theater, but also sounds better than most movie theaters. Based on a wealth of measured data in real studios and halls, Cinema DSP is designed to bring out the full potential of movie sound mixes, reproducing them the way directors and sound engineers intended.

And, when you're listening to multichannel presentations late at night, you'll appreciate Silent Cinema, which simulates 5.1-channel listening through a pair of ordinary 2-channel headphones (not included). Silent Cinema uses unique parameters for each soundfield to ensure accurate headphone representations of each soundfield.

Then there's the six-channel DVD-Audio-ready inputs mentioned above. "If DVD-Audio is so high-tech," you might wonder, "why do I need analog inputs to appreciate it?" That's because, for reasons of data density, DVD-Audio players perform their own digital-to-analog conversion, passing high-resolution analog signals on to your amplifier. (And analog, after all, is what your amp feeds your speakers.)

DVD-Audio can deliver up to six channels of discrete, full-frequency sound at greater-than-CD resolution (24 bits, 96 kHz sampling rate versus 16 bits, 44.1 kHz for CD), and some discs will exploit the chance to offer an ultra-high-resolution, stereo-only 192 kHz sampling rate. In stereo or surround, the sound from DVD-Audio is packed with detail, yet smoother and sweeter from than the sound from even the best standard CD players. The HTR-5560 accommodates decoded DVD-A signals and routes them to the appropriate speakers in your surround system.

The versatile unit offers five video input connections (with four S-video inputs), five fixed and assignable digital-audio inputs (great for DSS, CD, laserdisc, gaming consoles, or minidisc), and front-panel input connections for your camcorder or other spontaneous hookup. The HTR-5560 comes with a preset remote control.

Last, but certainly not least, the HTR-5560 benefits from Yamaha's Digital ToP-ART (Total Purity Audio Reproduction Technology) build philosophy. ToP-ART's goal is to maximize digital quality while minimizing analog circuitry. The culmination of the best digital engineering and design possible, it brings together several key elements to create the best-sounding, easiest-to-use A/V components available.

This 5.1-channel digital home theater receiver From Yamaha provides a high-performance listening experience at an excellent value. The HTR5930BL includes many enhanced features, such as CINEMA DSP, SILENT CINEMA, realistic surround programs, and three component video inputs. It's also XM Satellite Radio Ready (Requires subscription, not included). 7 DSP Programs - 4 CINEMA DSP And 3 HiFi DSP / XM Ready Preset Remote Unit - 192kHz/24-Bit DACs for All Channels DVD-Audio/Super Audio CD Compatibility Speaker A, B or A+B Selection (Front L/R) Analog Mixdown Sleep Timer /40-Station Preset Tuning / Auto Preset Tuning Dimensions (WxHxD) - 17.13 x 5.94 x 12.38 inches Weight - 19.8 lbs Manufacturers Warranty - Two-Year Parts And Labor

Amazon.com Product Description Take the next step in home theater performance with the Yamaha HTR-5930 digital surround receiver, which boasts 5.1 channels (110 watts x 5) of amplification and a host of high-end features. The receiver is built around Yamaha's proprietary surround sound technology and a powerful 192 kHz/24-bit digital-to-analog converter that maximizes the signal quality, ensuring that everything from two-channel audio sources to 5.1-channel DVDs sound rich, immersive, and dynamic. Plus, the receiver's wide 10 Hz to 100 kHz frequency range helps digital audio sources like DVD-Audio and Super Audio CD reach their full potential.

Movie and music buffs will dig the HTR-5930's Digital Sound Processing (DSP), Yamaha's means of simulating the acoustics of a concert hall, movie theater, or rock concert hall in the comfort of your own home. The Cinema DSP's four programs includes Movie Dramatic, Movie Spacious, Game, and TV Sports, each of which creates an optimum sound field for a specific type of programming. The Music DSP modes, meanwhile, range from 2-Channel Stereo to Concert Hall to Roxy Theatre, the latter of which reproduces the dynamic music environment of one of L.A.'s legendary rock clubs. And, of course, the HTR-5930 handles standard processing for Dolby Digital, DTS, and Pro Logic II sources.

What really makes the HTR-5930 tick, however, are the extras, such as Silent Cinema, a Yamaha-exclusive technology that lets you enjoy multichannel music or movie sound through ordinary headphones, and a night listening mode that lowers the volume during loud passages so the kids don't jolt awake after hearing explosions and other special effects from the next room. Plus, the HTR-5930 not only comes with a standard AM/FM tuner, but is also XM satellite radio ready. All you need is a separately sold XM antenna and a subscription to XM satellite radio and you're set.

Click to view the Yamaha HTR-5930's back panel.

Additional features include a virtual surround sound mode, A or B speaker selection, a sleep timer, and a Set menu that lets you optimize the receiver to suit your individual home theater system.

With a bevy of digital and analog inputs, the HTR-5930 can accommodate several digital sources such as DVD players, CD players, video game consoles, digital satellite systems, and much more. The rear panel options include two optical digital inputs and one coaxial digital input; three HDTV-compatible component video inputs and one output; four composite video inputs and two outputs; and two analog audio inputs and one output. Also present is a 5.1 multichannel input.

The HTR-5930 measures 17.12 by 5.94 by 12.44 inches (W x H x D) and is backed by a two-year warranty.

What's in the Box
HTR-5930 receiver, remote control, two AA batteries, AM loop antenna, indoor FM antenna, user's manual.

Amazon.com Product Description The Yamaha HTR-5850 XM-ready digital hometheater receiver is a full-featured digital home theater receiver that sports some serious features. Component video-up conversion takes composite signals and converts them into a component signal. This not only ensures the highest quality video from any source, it means you only need one connection to your HDTV monitor. No more switching inputs according to your source--it can all go through the component video connection.

Some other major features on the Yamaha HTR-5850 include 6.1-channel discrete amplification (105 w x 6 RMS) and Yamaha's Digital ToP-ART (Total Purity Audio Reproduction Technology) amplifier design concept that ensures the highest signal purity, and 14 surround programs. Also featured is Silent Cinema, Yamaha's exclusive technology that allows private listening enjoyment of multichannel music or movie sound, including Dolby Digital and DTS Digital Surround, through ordinary headphones. The system's digital-to-analog converters use an extremely high performance 192 kHz/24-bit operation type and perform accurate sound field reproduction for high-quality multichannel sources. And for two-channel stereo, they provide outstanding separation and precise musical delineation. In addition, the HTR-5850-SL has high-quality two-channel and multichannel surround reproduction and reproduces surround for 5.1 channels and 2.1 (virtual surround). The HTR-5850 is also XM Satellite Radio ready, which means that with the addition of an XM Connect-and-Play and XM subscription, you can tune into your favorite XM broadcasts.

Click to view the Yamaha HTR5850's connections.

The HTR-5850 also features Yamaha's exclusive Quad-Field Cinema Digital Sound Field Processing, or DSP--Yamaha's way of recreating the ambiance of a stadium, a concert hall, or an intimate club in the comfort of your own home. With 14 different sound programs that provide multiple variations, every movie and every piece of music will sound right in your home theater. Discrete power transistors, rather than chips, are used in the amplifier section to provide the cleanest sound possible. The amp delivers 105 watts each to seven channels, and the HTR-5850 can accommodate DVD, CD, MC/CDR, and digital TV/cable. Three optical digital outputs assure the finest possible signal leaving the receiver for your other components. A set of front panel A/V inputs allows for simple temporary connection. The receiver also features an AM/FM digital tuner with 40 station presets.

What's in the Box
HTR-5850 receiver, remote control, batteries, AM antenna, and FM antenna.

The HTR-5850 is a 6.1-channel receiver offering outstanding sound and picture quality with a wide range of features such as 630W (105 x 6RMS) power, Quad-field CINEMA DSP, XM Satellite Radio ready and Component Video Up conversion.