Is it possible to make a $700 "mainstream-audio" power amplifier sound exactly like a high-priced perfectionist amplifier? Bob Carver, of Carver Corporation, seemed to think he could, so we challenged him to prove it.
For a while, I've been hearing rumors that the record-club editions of popular compact discs differ from the original versions produced by the record companies. I've met listeners who claim their club versions are compressed in dynamics, and some have reduced bass. Perhaps the clubs, in their infinite wisdom, think the typical member has a lower-class stereo system (in fact, the opposite may be true). Maybe these lower classes could benefit from some judicious dynamic compression, equalization, and digital remastering.
Editor's Note: In 1985 and 1986, an argumentative thread ran through Stereophile's pages, discussing the benefits or lack of double-blind testing methods in audio component reviewing, triggered by J. Gordon Holt's review of the ABX Comparator. As this debate is still raging nearly 15 years later, we present here the entire discussion that bounced back and forth between the magazine's "Letters" section and features articles. It was kicked off by a letter from C.J. Huss that appeared in Vol.8 No.5.—John Atkinson
The Compact Disc clearly hasn't read the script. At a time when, in the autumn of its commercial life, the format is supposed to be stepping aside to allow younger blood to succeed it, CD has instead in recent years enjoyed something of a revival in audiophile opinion. While SACD and DVD-Audio, rather strutting and fretting their hour upon the stage, are doing more plain fretting than anything, the best in CD sound quality has improved sufficiently for some to question whether we need the new media at all.
Editor's Note: This article is now only available as an Audio Engineering Society preprint, under the title "The Role of Critical Listening in Evaluating Audio Equipment Quality," preprint number 3176. The price is $4.00 for AES members, and $5.00 for non-members; it can be ordered (currently on paper only, not as a downloadable pdf) by entering the number in the appropriate field on the preprint search page at the AES website.
There was a time, as recently as 40 years ago, when frequencies below 100Hz were considered extreme lows, and reproduction below 50Hz was about as common as the unicorn. From our present technological perch, it's too easy to smirk condescendingly at such primitive conditions. But just so you're able to sympathize with the plight of these disadvantaged audiophiles, I should tell you that there were two perfectly good reasons for this parlous state of affairs. First of all, program material at that time was devoid of deep bass; not because it was removed during disc mastering but simply because there wasn't any to begin with. The professional tape recorders of the day featured a frequency response of 5015kHz, ±2dBjust about on a par with the frequency performance capability of a cheap 1988 cassette tape deck.
Editor's note: When Jonathan Scull reviewed the Shun Mook devices back in 1994, he unleashed a hailstorm of controversy that continues to this day. Below is his original report along with some of the follow-up articles and fallout.
"What's that noise?" Bob Harley and I looked at each other in puzzlement. We thought we'd debugged the heck out of the recording setup, but there, audible in the headphones above the sound of Robert Silverman softly stroking the piano keys in the second Scherzo of Schumann's "Concerto Without Orchestra" sonata, was an intermittent crackling sound. It was almost as if the God of Vinyl was making sure there would be sufficient surface noise on our live recording to endow it with the Official Seal of Audiophile Approval. Bob tiptoed out of the vestry where we'd set up our temporary control room and peeked through a window into the church, where a rapt audience was sitting as appropriately quiet as church mice.
One of the great imponderables in hi-fi is how much the vibrations of a dynamic loudspeaker's cabinet walls contribute to its overall sound quality. Studies by William Stevens in the mid-1970s showed that, with some speakers, the acoustic output of the enclosure could be almost as much as that from the drive-units. Since then, responsible speaker designers have worked hard either to damp cabinet vibrations or to shift them to higher frequencies where their effect on the music will be less deleterious.
Alright already, quit shoving. I know I don't belong here. This magazine already has a place for manufacturers---in the back, where those large egos are squeezed into small column inches so they can't hurt you. Not that I'm exactly proud of my job. On social occasions, if pressed as to my profession, I will usually admit to some honest toil such as mortician or hodcarrier. Speaker design is downright devious work. As proof, examine the specifications for the 1376 models in Audio's 1988 equipment directory. Much of this data, when compared with each described system's real-world performance, looks like Joe Isuzu wrote it on a bad day.
Although I still haven't been able to listen to the Cary Audio Design 805 single-ended tube monoblocks that Stereophile praised so highly a year ago (Vol.17 No.1, p.104), I've recently auditioned many other tubed single-ended designs. Undeniably, a good SE design has a distinctive quality of harmony and atmosphere in the midrange that reaches well beyond the average attainment of its solid-state brethren.
You're a typical audiophile. You read this magazine and others like it cover to cover, month after month, keeping up with industry trends and insider gossip. You've ingratiated yourself with every hi-fi dealer in your area, all of whom will let you take equipment home for extended auditions, give you generous trade-in allowances, and sell to you at a small percentage above their cost. Never pay retail, you chuckle to yourself, checking the newspaper's classifieds for audio bargains.
Pick an expletive—one you would normally use to express deep intellectual frustration—but don't vocalize it. Hold it in reserve for a few minutes, letting it simmer to concentrate its intensity. I'll tell you when to let rip.