Bye Bye, Quadrifi?
"As We See It" in the Stereophile issue dated Summer 1968 (actually published in 1970) noted the idealistic, glowing claims about how four-channel sound could put you right in the concert hail, but urged readers to wait before buying, to see whether quadrisound would indeed bring higher fidelity. We predicted it wouldn't—that whatever the potential of quadrisound (footnote 1), it would not be used to increase fidelity, but rather to play ring-around-the-rosy with music.
California Audio Labs Tempest CD player
"A thing divine—for nothing natural I ever saw so noble."
Cary Audio Design CAD-5500 "CD Processor" preamplifier
A "CD processor," is how I distinctly heard Cary Audio's Dennis Had describe it. The venue was Stereophile's High End Hi-Fi Show in New York last April. Nothing really unusual in today's digital marketplace, I thought to myself, though a bit out of character for a company dedicated to vacuum-tube technology. But wait a minute. Dennis had described it as an analog CD processor. Analog!? Well, yes, the unit processes the analog signal from a CD player.
CD: A Lie Repeated Often Enough Becomes Truth
Larry Archibald on CD:
This article on Compact Discs and CD players is by Doug Sax, president of Sheffield Records and a longtime opponent of digital recording. J. Gordon Holt offers a responsehttp://www.stereophile.com//digitalsourcereviews/193/">response; elsewhere in this issue, in which he advises readers to buy a Compact Disc player as soon as they can afford it. Gordon in general hails the Compact Disc as the greatest thing to hit audio since the stereophonic LP.
This article on Compact Discs and CD players is by Doug Sax, president of Sheffield Records and a longtime opponent of digital recording. J. Gordon Holt offers a responsehttp://www.stereophile.com//digitalsourcereviews/193/">response; elsewhere in this issue, in which he advises readers to buy a Compact Disc player as soon as they can afford it. Gordon in general hails the Compact Disc as the greatest thing to hit audio since the stereophonic LP.
Celestion SL700 loudspeaker
"Who Stole The Bass?" asked Anthony H. Cordesman, writing about minimonitors in the April/May 1987 Stereophile (Vol.10 No.3). And for the designer of a box loudspeaker, the fundamental design decision, at any price level, is how much bass extension to aim for. It will always be possible to design a speaker with extension down to 20Hz, but will the result be musically and commercially successful? Will the designer end up with a speaker hypertrophied in that one area at the expense of every other? Will, indeed, the result be feasible technically? For example, for a given cabinet volume, gains in low-frequency extension have to be balanced against corresponding drops in sensitivity, and it is quite possible that to go for 20Hz extension will result in a 60dB/W/m sensitivity, equating with a speaker that only plays extremely quietly, and thus of no use to anyone.
Changes of Everything
As of February, 1982, the ownership of this publication passed to other hands. In total despair about its precarious finances, JGH accepted with alacrity an offer by Larry Archibald (an occasional contributor in recent years) to purchase the magazine. This has now come to pass, and it is because of the resulting infusion of money that you are holding this issue in your hot little hands now instead of three months from now (and that is probably being a little optimistic about the way things were).
Copycode & the Future of DAT
Now that Sony has bought CBS's records division, and the infamous Copycode bill seems to be dying in Congress, the way may be clearing at last for the US introduction of the new Digital Audio Tape system. This has sparked renewed speculation in the industry about the impact DAT will have on existing formats, particularly the fledgling CD. Some are convinced DAT will kill CD, because of its ability to record as well as play digital recordings. Others believe DAT won't even gain a foothold in the market, for the same reason quadraphonic sound laid an egg back in the '70s: The public can't handle more than one "standard" format. I feel that both views are wrong, and that—as is usually the case with extreme views—the truth lies in between. I believe DAT will catch on in the marketplace, but never in a big way, and certainly not the way CD has. Here's why.
Copycode: Diminishing DAT
How can you tell when a politician is lying? His lips move. How can you tell when a recording system is perfect? CBS tries to outlaw it.
Dahlquist DQ-10 loudspeaker
The Dalhquist DQ-10 loudspeaker has not as yet been formally submitted for review. (The designer tells us he is still working on the low end.) We auditioned a pair at the one local dealer we could find who had the DQ-10s on demo, and were immensely impressed. Obviously, Jon Dahlquist is on to something that other speaker designers have been overlooking, for, despite the multiplicity of driver speakers in the system, the DQ-10 sounds like one big speaker. There is no awareness of crossovers or separate drivers (except at the low end, about which more subsequently), and the overall sound has a degree of focus and coherence that is surpassed only by the Quad full-range electrostatic, which don't go as low at the bottom or as far out at the top.
dbx 700 digital audio processor
As ALF would say, "There's more than one way to cook a cat." We've been so overwhelmed with linear pulse-code modulation (PCM) recording, we forget there are other ways to pass from the analog domain to the digital.
One of these is delta modulation. The Greek delta (which in its upper-case, block-letter form, looks like an equilateral triangle) is the mathematical symbol for the difference between two quantities; accordingly, in delta modulation, we record not the absolute value of a signal sample, but the difference between successive samples.