Bryston describes its SP2 multichannel preamplifier-processor ($4995) as consisting of a stereo analog preamp with a volume-controlled 5.1-channel analog pass-through plus a full-featured multichannel digital audio processor, and claims that none of those functions compromises any of the others. The analog preamp is fully equivalent in features and performance to their BP26 preamp. The digital processor includes all the latest Dolby Digital, DTS, and THX modes, and is based on Texas Instruments' powerful Aureus DSP chip, which can be updated via an S/PDIF input. The digital and analog sections have independent power supplies, and there are no video inputs or functions other than a control port for the optional, external SPV-1 video switcher.
It seems these days that everybody and his brother is doing something about room equalization. Sure, we had the old-time graphic and parametric EQs—now we're seeing much more sophisticated and dedicated devices, from the TacT and Z-Systems standalone products to the auto-setup and EQ systems found in many A/V receivers. I was impressed with the Audyssey MultEQxt in the Denon AV-4806 receiver—see my "Music in the Round" column in March, p.50—and a standalone AudysseyPro unit was demonstrated at the 2006 Consumer Electronics Show.
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 the past few installments of this column I've promised to talk about another subwoofer equalizer system. Now I'm going to pull the old switcheroo and discuss a different subwoofer EQ. The SMS-1 is a new, standalone digital equalizer system from Velodyne, based on the EQ built into their DD-series subwoofers. Larry Greenhill went gaga over the Velodyne DD-18 in the June 2004 Stereophile, particularly because of the ease and sophistication of the EQ system. Apparently, one of the Velodyne sales guys asked the obvious: What about making the EQ available separately for use with other subwoofers?
Looking back to see which of the multichannel discs I've reported on that have made a splash in the market, I detect an ominous trend. Most are reissues of classic performances, including all the RCA Living Stereo and the Mercury Living Presence SACDs, as well as a number of classic jazz and rock albums (including yet more editions of Kind of Blue, Dark Side of the Moon, and Brothers in Arms).
The ongoing reissues of Mercury Living Presence and RCA Living Stereo recordings, have been the signal successes of the SACD format. Despite having been recorded in only (!) three channels, these releases have given us very good justifications for going beyond two-channel stereo to get as unrestricted a hearing as possible of live performances.
Ever since I installed dedicated power lines for my multichannel system, I've been wrestling with the issues of surge protection, power conditioning, and voltage regulation. I start with a bias based on decades of happy listening without being concerned about any of these problems, and my belief that competent electronic components must be, and are, designed to perform in the real world. After all, whether the device's AC power supply is a traditional transformer-bridge-reservoir or a switching supply, its output should be a DC source that is sufficient to let the active circuitry meet its specifications. Many manufacturers, such as Bryston, recommend bypassing any line conditioners and plugging their components directly into the AC outlet.
When I was a young amateur photographer, I subscribed to all the major photo magazines and avidly read all the articles. However, I was bugged when I realized there was a cycle of repetition—that I was reading about the basics of Ansel Adams' Zone System for the third time.
Along with speakers and their placement, the greatest influence on the sound of a music system are the acoustics of the room itself. With two-channel stereo, some reflections and reverberations are necessary in order to maintain the perception that one is listening in a real space. So, while many experts recommend having a "dead" end behind and near the speakers that absorbs most sound, few suggest such treatment for the rest of the room. With too few sonic reflections, the stereo image would narrow; without the aid of "room gain" to enrich the bass, the sounds of instruments and voices would be thin. Listening in an anechoic chamber is interesting and informative, but far from pleasurable.
With the new power and furniture arrangements in my multichannel room, I've begun to reexamine all the other things that affect system performance, including power conditioning and signal cables. However, I could not get my wife to accept the presence in that room of an ASC Sub Trap, which lifted my Paradigm Servo-15 subwoofer to eye level. Not that I protested the Trap's departure all that much—at that height, Trap and sub partly blocked direct radiation from my rear left speaker. But I felt its absence immediately, as my system returned to the usual somewhat boomy, overly punchy bass. The ASC left me with the determination to deal with room problems, particularly in the bass.
My experience at last May's Home Entertainment 2004 East confirmed that even a big cheerleader for discrete, high-resolution multichannel music must be realistic about the vast heritage of two-channel recordings, which will dominate collections for years to come. Although we can enjoy these recordings with a good stereo system, a multichannel system can offer options that give them new life without superimposing false and disturbing directional effects or smearing the two channels around and behind the listener.
As noted in the March installment of "Music in the Round," there are so many new multichannel hardware goodies to talk about that we need this bonus appearance of the column just to keep up. Nor do I expect the rush of gear to stop—I've just returned from CES in Las Vegas, where there was lots of new multichannel hardware and software that I will report on in June, including a luscious all-tube analog multichannel preamp. This month I report on a universal disc player, a comparison of Sony's top-of-the-line SCD-XA9000ES multichannel SACD player with its respected predecessor, and a multichannel preamp that's almost too good a deal.
For audiophiles who love multichannel music, the center-channel speaker is a problem second only, perhaps, to that of bass management. In many ways, the rerouting of bass to a subwoofer or to the front left and right main speakers is dictated by room acoustics or the bass limitations of the other speakers. On the other hand, most of us had no real need for a discrete center-channel to fill in the middles of our traditional stereo systems. In fact, one of the glories of really good stereo is the simulation of a convincing central image, such that there's a seamless soundstage from beyond one speaker, across the room, to beyond the other speaker.