Audyssey

Everyone at one time or another has been annoyed by the unpleasant bass thumps of a neighbor's subwoofer or large speakers. While midrange and high-frequency sounds are more easily enclosed by walls, low bass frequencies pass right through them. And, of course, it's not just a noise problem from neighbors; home-theater bass can disturb other family members within a house or apartment.

Methods used to isolate or restrict bass from going through walls, floors, and ceilings can get expensive, and unless recording-studio construction techniques are employed bass is hard to control. Brick and concrete are more effective than … Read more

Multichannel movie sound dates back to Disney's "Fantasia." When the film was first released in 1940, the number of speakers used was scaled to the size of the individual theater; 30 to 80 speakers were installed behind the screen and around the perimeter of the ceiling.

Home theater multichannel sound arrived many decades later, and quickly settled on a 5.1 channel system, which is just a scaled-down version of the current movie theater system. The home system uses three front speakers--left, center, right--and two surround speakers placed on the sides of the room. The subwoofer supplies … Read more

I recently wrote about how to improve the sound of your speakers by fine-tuning their placement in your room. Hey, it's a free "tweak," and can make a big difference in your sound.

The same logic applies to subwoofers. So if you just plopped your sub down in the corner, chances are you haven't even begun to hear how good it can sound. Optimizing subwoofer placement within your room is the key to achieving the best possible performance.

To judge the potential for changing the sound, move the sub 5 or more feet from wherever it … Read more

The Audyssey Audio Dock is one of the best-sounding iPhone speaker docks CNET's reviewed in 2010. Unfortunately, at $400, it's also one of the most expensive.

But right now, you can get the Audyssey Audio Dock for 25 percent off. Here's how:

Visit www.audyssey.com/products/southofmarket/buy.html and select "add to cart." Then proceed to checkout and enter the promo code AUDFRIENDFAM when prompted (just before entering your credit card info). Doing so should knock $100 off your bill; if successful, the discount will show up on the page.

Now, the caveats: … Read more

For this week's giveaway we've got something that hasn't even quite hit the market yet: the Audyssey Audio Dock "South of Market Edition." We already reviewed this high-end iPod/iPhone audio system, which is due to hit Apple stores in early November, and liked what it had to offer. We said that while the Audyssey Audio Dock is on the expensive side, "it's one of the better-sounding--and versatile--iPod/iPhone audio systems with built-in Bluetooth and speakerphone capabilities we've tested." (Read the full review here).

Normally, Audyssey Audio Dock "South of … Read more

Audyssey says it was inspired to name its first iPod-iPhone audio system after the South of Market (SoMa) neighborhood in San Francisco because of its "eclectic blend of energy and history." Well, we're not sure what that means, but the Audyssey Audio Dock "South of Market Edition" definitely is distinct-looking and has some interesting features to accompany its very good sound--all of which goes a long way to justify its fairly high $400 price tag.

If the Audyssey brand seems familiar, it's because it is the company behind the autocalibration systems in a lot … Read more

Just about every home theater receiver comes with an automatic speaker setup and calibration system: Denon, Marantz, and Onkyo feature Audyssey; Pioneer has MCACC (multichannel acoustic calibration); Sony's is called DCAC (digital cinema auto calibration); and Yamaha's proprietary system goes by the name YPAO (Yamaha Parametric Room Acoustic Optimizer). The systems handle the basics like determining the sizes of all the speakers, setting speaker and subwoofer volume levels and the speaker-subwoofer crossover point, measuring the distances from the speakers to the listener, and checking that all of the speaker cables are correctly hooked up. Some autosetup systems also employ equalization to balance the frequency response of all the speakers, and they try to minimize room acoustic problems.

To accomplish these goals, the systems send test tones through all of the speakers and the subwoofer, and they all use a microphone to capture the sounds of the speakers. Autosetup is a great idea, but there's no guarantee you'll have a perfectly adjusted home theater sound after the test tones have run through all of their beeps, whooshes, and thumps. The volume levels of the speakers may not be perfectly adjusted, the speaker-to-listener distances may be inaccurate, and the subwoofer volume may be too loud or too low. In the worst cases, the autosetup sounds worse than doing no setup at all.

These malfunctions can be caused by a number of things: your room may not be quiet enough, microphone placement can have an effect, or your subwoofer's built-in volume control may be set too low or too high. I'd recommend checking that all of the speakers are wired "in-phase," meaning red/+ and black/- connections are consistent at the speaker and receiver ends. Some autosetup systems check the wiring, but try to get it right in the first place.

I recently met with Chris Kyriakakis, Audyssey's CTO and founder, to talk about new developments at Audyssey, and while I had his ear, I brought up my concerns about autosetup problems. He followed up with a list of tips that generally apply to most autosetup systems. There's a lot of useful information about Audyssey setup on the company's Web site.… Read more

I've reviewed many Denon receivers, but never one of the really big ones. Richard Ames, that lucky devil, had the pleasure of putting the Denon AVR-4810CI through its paces for "Home Entertainment" magazine.

Each of the receiver's nine channels puts out 140 watts. Just about every surround format is on board, including Dolby ProLogic IIz height channel processing and Audyssey's DSX (which adds the possibility of width channels as well). You also get Audyssey's MultEQ XT 8-point room correction processing.

Video signals, regardless of resolution or input, can be upconverted/transcoded to HDMI and … Read more

Those awful glasses may doom 3D TV.

What with all the advances in technology they still haven't eliminated the glasses people have been using to watch 3D movies since the 1920s. "Avatar" and "Alice in Wonderland" may use vastly more refined 3D techniques, but the glasses remain. Some people get headaches, dizzy, or even nauseated watching 3D. There are exceptions, but most 3D films haven't matured past the gimmick stage.

No matter how you look at it, 3D TV is an expensive proposition. You'll need to buy a new Blu-ray player, new TV, and possibly a new receiver. Oh, and don't forget to factor in the cost for extra 3D glasses for family and friends.

Worse yet, after you've made the substantial investment in new hardware there's not a lot of 3D content to buy or see. Put those bucks in better-sounding speakers, and you'll have a vast assortment of choices to dazzle your ears right away. Surround sound may be imperfect, but you can hear it with just your own two ears; no special "ear goggles" are required.

So instead of investing in 3D TV, take those dollars and buy better speakers or a new receiver. That's an improvement you hear with every movie you watch and music you listen to. It's simply a smarter way to spend your money.

What is 3D sound? True 3D sound would involve height, width, and depth speakers. Stereo sound produces width, and surround speakers produce depth. What about height? My experiences with the only available height systems--Dolby Pro Logic IIz and Audyssey DSX--didn't do much for me, but I'm not giving up on the height dimension entirely. Pro Logic IIz and Audyssey DSX were designed to work with any surround movie. Maybe we'll have to wait for movies mixed to provide genuine height information to get three-dimensional sound.… Read more