MASTERS ON AUDIO AND VIDEOLetters Archives

July 2002

 

I just had to write to tell you how refreshing I find your site. While so many other audio writers seem obsessed with ultra-expensive equipment, spurious tweaks, and inflated claims, you seem to always focus on nuts-and-bolts, straightforward information that music lovers in the real world (like myself) can appreciate.

You also seem to buck many of the tenets of "true high end" thinking. I mean, someone writes asking about switching to tube amplification (which some circles in audio will tell you is the only way to go), and you tell him you can't understand why he'd want to. You're not constantly carping about the "low quality of redbook CD sound" (in fact, you seem to appreciate the advance in reproduction CD represents for most people).

Your site isn't focused on reviews of the latest greatest component that now makes the last latest greatest component obsolete. You also are the only audio writer today that dispenses advice on cassette decks, everyone else seems to feel cassette is too "low-fi" to warrant their attention even though most people have large collections on cassette.

Thanks for all the down-to-earth information, and keep up the good work.

...Travis Cunningham


You commented elsewhere on multi-standard DVD playback. While I have not tested the specifics of PAL-encoded DVDs for playback in the U.S., I have quite a bit of feedback on NTSC-encoded DVDs and their playback elsewhere. We are producing NTSC DVDs here in the U.S. without regional encoding and have sent them to many areas of the world (England, France, Germany, and various other areas of Europe, South Africa, Australia and other areas of the South Pacific, Japan, Hong Kong, Taiwan, Thailand, Indonesia, India, The Philippines, various countries in South America including Brazil, also in Central America and Mexico). All have reported that the DVD plays very well with no problems in their local DVD machines and TVs (even very old ones). Apparently the digital-to-analog decoding of the video signal is handing the conversion from NTSC very well.

We are currently using DVD as a mastering medium in some of those countries that have only been able to use SVHS masters for in-house duplication (or outside vendor duplication in some third world areas) of "corporate" videos. Our determination is that we have found a universal playback medium. We are mastering DVDs with 16-plus languages on them (2 video passes) and they are extremely well received. The DVD format is simplifying our world.

...Tim Taggart,
Manager of International Audiovisual
The Church of Jesus Christ of Latter-day Saints


I hooked up an amplifier rated at 250W x 3 to the pre-outs of my receiver, rated at 90W x 2 or 70W x 5. I used the outboard amp for the main left/right and the center-channel and the receiver's amplifiers for the rears. I was expecting to get a higher volume level, especially in stereo, considering the much higher power of the amplifier, but I am not. It's just about the same as receiver. Could you tell me the possibilities?

...Arnel Calimbas

Higher amplifier power is not so much about louder sound as about cleaner sound. Whatever the potential wattage of the amplifier, it will be loafing along at a couple of watts most of the time. The extra power comes into play when a musical (or other) peak comes along: a bigger amp will be able to handle it without distorting or clipping, while a lesser amp might not. The "loudness" has to do with where you set the level control, and except at the extremes, large and small amplifiers can perform equally.

...Ian G. Masters


I am feeding the digital output of my DVD player to my A/V receiver. How will the higher quality DAC in the DVD player affect the digital output?

...Pris

It won't. By using the player's digital output, you are bypassing its internal digital-to-analog converter (DAC) and using the one built into your receiver. To use the (possibly) better DAC in the player, you have to feed its analog outputs to the six line inputs of your receiver, assuming it has them.

...Ian G. Masters


I never knew what to do with those audio jacks on VCRs. Can you tell me how to take advantage of them? Can I get hi-fi sound with just a TV?

..."Dark Shadows"

From the fact that you're asking the question, I assume you have your equipment connected the "traditional" way: cable or antenna to VCR's RF input, VCR's RF output to TV set's antenna input via a short chunk of 75-ohm cable. This arrangement does let you do the minimum: taping shows off air, watching those tapes, and watching another channel while you are making a tape. But it involves the worst compromises in terms of quality, especially audio quality.

The VCR has to modulate the video output of the tape or the VCR's tuner on a radio-frequency (RF) carrier so that the TV set's tuner can handle it. This not only involves considerable compromise in picture quality, but the audio quality is minimal. . . and mono. Even if the source is stereo and your TV can handle it, you'll get mono. So if you have a hi-fi VCR, you'll get none of the benefit of the technology.

The simplest solution is simply to connect the RCA outs on your VCR (both audio and video) to the corresponding inputs on the TV. This will give you an immediate improvement in picture quality, and will use whatever audio quality your set provides. It may not strictly be hi-fi, although some sets have surprisingly good sound, but it can at least take advantage of stereo signals.

Better still is to feed the RCA audio outputs to an external audio system, which will give you the best sound. Even a two-channel stereo will provide a vast improvement, although an A/V receiver with Dolby Pro Logic decoding would be better. You can either feed the direct video from the VCR to the TV set, or route it through the receiver, which would let you switch both audio and video with the same click on the remote control. You can leave the existing RF connections in place, so you can still watch one program while taping another, as long as you remember to switch back to the TV set's video input for normal viewing.

...Ian G. Masters


In the past few years, home-theater systems have dominated the audio market. Are they real options to the classic audio systems with just two loudspeakers or, for the best audio sound, should we keep the old-style system?

...Armando Guimar‹es

While many audiophiles cling to their devotion to exotic two-channel systems for music -- and the best of them do probably represent the highest possible level of audio quality -- there are many extremely fine examples of multichannel home-theater setups that handle music recordings beautifully, and the extra impact of the surround sound (even that derived more or less unintentionally from two-channel recordings) might well outweigh any slight sonic drawbacks. An increasing number of experts believe that multichannel sound is the future of music recording, the two-channel standard being more or less a historical accident. That being the case, multi-speaker systems will only improve over time, but the best are pretty good right now.

...Ian G. Masters


I recently bought an A/V receiver with output power rated at 90Wpc. I am looking to buy a new set of home theater speakers but I am getting conflicting answers from the sales people and from some of the articles on the web. Do I have to buy speakers that are rated higher or lower than 90W?

...Jacob Mathew,
Qatar

It would be nice to be able to advise you just to match up the numbers. Their existence implies that that's all you need to do, but unfortunately that's a crock. Frankly, the speaker ratings are meaningless at best, and misleading at worst. No two manufacturers measure them the same way, and there are no standards to determine what factors are important. A 90Wpc A/V receiver should be able to drive practically any combination of home-theater speakers you choose, as long as there are no impedance problems, and as long as you are not trying to blow the walls out of your listening room. If you're worried, get your dealer to let you try out the speakers you are considering with a receiver rated the same as yours. If you get satisfying sound that doesn't seem to be straining, go with it.

...Ian G. Masters


I know that nobody has really done a test on blank cassette tapes in years, due to all the digital recording devices out now, but I still like to record onto tape once in a while. I was wondering which company makes the best blank cassette, TDK or Maxell.

...Keith Hugo

Both make superb tapes, as do the other "name" brands. But one may be closer to being compatible with your cassette deck than another -- tiny bias variations can make a huge difference. If your cassette deck lets you match it to a tape -- and if you are a serious recordist, it should -- use that facility. You should then hear virtually no difference between brands. If you can't do that, then buy samples of a number of brands (and grades within the brands) and try them out. Stick with the one that performs best.

...Ian G. Masters


I have a pair of 6" x 9" speakers on the rear shelf of my car in wooden boxes (metal under the shelf prevented me from mounting them there). I was wondering if the boxes would be better completely sealed or with a port in the side to let air in and out?

...Luke,
Australia

That's impossible to predict. Speaker design -- even car speaker design -- is a careful balance between drivers, enclosure size, enclosure configuration (closed or ported, for example) and position. And even if you decide to go with a port, it's more than just a hole in the box: there is almost always a duct leading to the port, carefully calculated to alter the back wave so it emerges in phase with the front wave, and thus reinforce it. Just putting a speaker in a box addresses none of those concerns. If you could mount the speakers in the rear deck, all of that would be irrelevant, but since you can't, I'd replace your speakers with one of the many varieties that come already mounted in matched enclosures, which need only to be attached to the shelf.

...Ian G. Masters


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