Obviously, no one wants to listen to exaggerated bass, italicized highs, or colored mids. But if you (as I have in the past few months) plug in several high-quality integrated amplifiers, each designed to a different price point, into the same basic signal chain, you'll experience a wide disparity of sound signatures.
Blind though I am to the allure of blind testing, I can appreciate some degree of review-sample anonymity: Distinctive products elicit distinctive responses, but a plain black box encourages us to leave our prejudices at the door. It asks of us a certain . . . objectivity.
So it was with the Micromega AS-400 digital source/integrated amplifier ($4495), the anonymity of which was compounded, in my case, by a generous helping of forgetfulness: I suppose I was told, ahead of time, that this was a class-D amplifier, but at some point in time before my first at-home audition I apparently killed the brain cells responsible for remembering that fact. So I was innocent of conscious prejudice when I listened to this elegant cipher of a box and wrote, in my notes: "Dynamic, dramatic, and almost relentlessly exciting with some recordings. Imbued pianos with almost too much dynamism for the roomtoo much being very good!but lacked some 'purr' in the die-away. Basically fine and fun. Wish it had a little more color and spatial depth."
In September 2005, for the first time, I attended the Expo of the Custom Electronic Design & Installation Association (CEDIA), in Indianapolis. Although I saw many familiar faces and companies, it was apparent that the event was dominated by a spirit very different from the one that pervades this magazine or the high-end exhibitions at the annual Consumer Electronics Show (CES). That spirit, however, does suffuse the rest of CES, and is well represented at Primedia's own Home Entertainment shows. That spirit encompasses video, and a view of audio that differs significantly from that of traditional audiophiles. Multichannel surround sound is taken as read, and novel technologies are prized higher than the proverbial "straight wire with gain."
In my last column, in November 2011, I mentioned that preamplifier-processors are generally at a price disadvantage in comparison to the same manufacturer's A/V receivers. The economies of scale almost ensure this. Typically, to design a pre-pro, a manufacturer uses one of its AVR models as a platform; the result is most distinguished from its parent AVR by its lack of power amplifiers.
It was 20 years ago today that Sgt. Michaelson taught the band to play. I was living in London when Antony Michaelson launched Musical Fidelity in an attempt to make a major statement in the area of affordable, high-quality, high-value electronics. Other Brits at the time were doing the same—companies such as Creek, A&R Cambridge (now Arcam), and DNM began to compete for the destitute audiophile's dollar.
The old advertising jingle "Who put eight great tomatoes in that itty-bitty can?" bubbled through my head as Musical Fidelity's Antony Michaelson proudly unboxed the new $4500 M3 Nu-Vista integrated amplifier. How did they cram it all in there?
My first trip to a Consumer Electronics Show, in January 2010, was an eye-opener. Not only had I never before seen the phony glories of Las Vegas, it was the first time I'd been to a high-end audio show. Between the offerings on the top floors of the Venetian and T.H.E. Show at the Flamingo, I met some great people and heard some wonderful new products. One of those people was distributor Kevin Deal, and one of those new products was from Mystère. Though I was familiar with the PrimaLuna line that Deal also distributes, Mystère was, well, a mystery. However, after a listen to the Mystère pa21 power amplifier making a pair of MartinLogan speakers sing, and after noting the reasonable prices for some of Mystère's beautifully designed and built amps, I put Mystère in my review queue.
At the extreme high end—Halcro, VTL, Boulder, etc.—reviewers gush about a lack of character. If you're paying $20,000, you want a preamplifier or power amp to disappear. At those price points we also want extreme, unfatiguing resolution, and noise that's well below what most people would consider audible. But at those prices, an absence of character is definitely something most people aspire to.
NAD has been out there on the leading edge of entry-level high-end sound long enough that some audiophiles reckon they invented the category. Sure, we should give serious props to the likes of Creek, Rotel, Musical Fidelity, Arcam, Denon, and Parasound, all of which have made significant contributions to the musical aspirations of budget-conscious pilgrims. But I continue to harbor warm feelings about my last extended visit with an NAD component: the inexpensive yet supremely musical L40 CD Receiver, which I reviewed in the June 2000 Stereophile.
A decade ago, many predicted that amplifiers with switching or class-D1 output stages would come to dominate high-end audio. In a postPeak Oil world in which the price of energy would always continue to rise, a class-D amplifier's very high efficiency in converting AC from the wall outlet into speaker-driving power would be a killer benefit. Although a conventional push-pull class-B amplifier has a theoretical efficiency of 78.5%, which would seem usefully high, this efficiency is obtained only at the onset of clipping; the need for the output devices to carry a standing bias current reduces that efficiency considerably, typically to around 50%. Class-A amplifiers are even less efficient, with a maximum of 25%; ie, three times as much power is dissipated by the amplifier as waste heat as is used to drive the loudspeaker (see "Sam's Space" in this issue).
Older audiophiles remember the splash NAD made in the late 1970s with the introduction of their 3020 integrated amplifier ($175). Ridiculously cheap, it looked graceful and sounded warm, inviting, and holographic. Removable jumpers between the 3020's sections permitted enthusiasts to determine whether the magic resided in its preamp, its power amp, or in some synergy of both.