Most audiophiles know Mobile Fidelity as the record company with the philosophy of resurrecting old, important, recorded performances and re-releasing them with (hopefully) the kind of sound they should have had in the first place. Few audiophiles are aware that Mobile Fidelity is also the name of a (different) recording company which collects sound effects in four channels for motion picture and television post-production.
The Question of Bass: J. Gordon Holt A few issues back, in Vol.9 No.3, I used "As We See It" to clarify what Stereophile writers have in mind when they use the term "transparency" in equipment reports. This time, I'll do the same thing for the performance parameters of bass reproduction.
One of the oldest names in US audio, Altec Lansing was building speakers for theaters and recording studios long before the introduction of the microgroove LP in 1948 (which date many see as marking the inception of high fidelity). Started in 1931 under the name All-Technical Services ~Corp., the firm later purchased another audio firm called Lansing Engineering, and merged the names. Altec's Model 604, one of the first true coaxial speakers, was adopted for home use by many early hi-fi buffs and, several permutations later, is still widely used for monitoring in disc-cutting rooms.
According to a recent newsletter sent to its regular contributors, our "competition"—The Absolute Sound—sees "controversy and confrontation" as the core of its editorial policy. By contrast, Stereophile sees as its modus schtickus an unflagging devotion to, and pursuit of, truth, reason, all of the eternal verities (including some you never heard of), and the intelligent exchange of informed ideas. In honor of all of the above-mentioned precepts (as well as some I didn't mention), this issue of Stereophile is largely devoted to the confrontation between knowledgeable writers for whom the widely proclaimed perfection of the Compact Disc remains a controversial issue.
The Sound-Lab electrostatic loudspeakers are legendary. Many serious audiophiles have heard of them, and rumors of their existence abound in audio circles. But, like gnomes, UFOs, and poltergeists, Sound-Lab loudspeakers are sufficiently hard to find that it is sometimes difficult to prove to skeptics that they exist at all. Well, I can now report that they do. As proof of this contention, I can point to the two which are actually occupying solid, tangible space in my listening room at this very moment. I have even taken a photo of them, which will be published along with this report if they leave any sort of an image on the film emulsion. (Many such apparitions do not!)
The D-250 is the flagship of Audio Research's power amplifier range and, at 250 watts per channel, is the most powerful all-tube stereo amplifier currently available in the US. Under the circumstances, then, it is not surprising that it should also be one of the heaviest and largest.
Before launching into Stereophile's first-ever report on a Mark Levinson product, an important point needs to be clarified. Although Mark Levinson products were originally made by Mark Levinson, they are no longer. Au contraire, Mark Levinson products are now being made by Madrigal, Ltd., which bought Mark Levinson Audio Systems' assets and trademark two years ago. Mark Levinson's products, as distinguished from Mark Levinson products, are now being manufactured by a company called Cello. But the subject of this report, the Mark Levinson ML-7A preamplifier, is a product of Madrigal, Ltd., not of Cello. Now that I've made that all perfectly clear, we may proceed.
Although inclined to mood swings bordering on the manic-depressive, I am generally a very patient, tolerant person, willing to accept and overlook the foibles of those less perfect than myself. But even my incredible equanimity has its limits, beyond which the milk of my human kindness curdles, becoming as lumpy as last month's yogurt.
Much of the descriptive terminology used in subjective reporting describes things we hear in live music, and expect—or, rather, hope—to hear from reproduced music, too. I'm referring to terms like width, depth, perspective, spectral balance, and tonal accuracy. If you read our reports, you know these terms as well as I do, and since they are (for most people) self-explanatory, I will devote no more time to them.