CD Player/Transport Reviews

It's easy to be impressed by Simaudio's Moon Evolution Andromeda Reference CD player. Everything about it oozes quality and luxury, from its imposing two-chassis configuration to the multi-component disc clamp of machined aluminum. Even surrounded by my double-decker VTL amps, VPI HR-X turntable, and Ferrari Fly-yellow Wilson Audio Sophia 2 speakers, the Andromeda was usually the first thing guests asked about: "How much does that cost?" The answer is $12,500. The Andromeda should look impressive.

All the action in digital playback for the past seven years has taken place in separate transports and digital processors. Nearly all high-end manufacturers have focused their skills on perfecting the individual elements of the digital playback chain—transports and processors—rather than on designing integrated CD players.

While many of the "modded Philips" firms simply replace the plastic "Philips" or "Magnavox" logo with their own after completing all their internal circuit mojo, for the Sonographe SD-22 ($895), Conrad-Johnson goes quite a bit further by wrapping the stock plastic flimsy-luxe box with their own heavy metal skin, making for a much stronger and nonresonant chassis. Unlike many of the modkateers, C-J doesn't replace the fairly flimsy stock RCA jack assembly of the Philips machine; in my experience, this is one of the first things to go bad on such a unit, as the contact integrity is usually poor and gets worse. Replacing the RCA assembly with high-quality gold RCAs would've raised the price of the SD-22 another $50–100, but I think the long-term reliability might be worth it. The SD-22 has no digital-out jacks, only analog outputs.

Publisher's Note: For the first time since I've published Stereophile, we are running two completely different—and opposed— reports on the same product. Normally, we try to reach some conclusion as to why reviewers come up with opposite views on a product, and resolve the problem prior to publication. In this case, the problem lies in the differing sound systems used for review. Since some readers will have systems like SWW's, and others will have systems more like JGH's, I felt it was valuable to run both reviews.

For the record, SWW's reference system consists of Dayton Wright XG-lO speakers, BEL 1001 amplifiers, a Klyne preamp, a SOTA Star Sapphire turntable, the Well-Tempered Arm (or Sumiko Arm), and a Talisman S cartridge. The sound on analog disc is far preferable to that from CD, being much more alive and present, and with a tendency to exaggerate sibilants. The low end of the system is awesome, the high end extended, and transients are rendered with a great feeling of immediacy and quickness.

I'll give the Giant Japanese Conglomerates one thing: they build their CD players like Humvees. The Sony CDP-X555ES ($900) exudes pride in ownership; from the simulated-wood side panels to the copper-shielded chassis, the Sony is a very impressive-looking player. Typically, however, Sony chose to marry a very sophisticated digital section with what appears to be a standard mid-fi analog section featuring Texas Instruments 5532 dual op-amps, carbon composition resistors, and inexpensive electrolytic coupling caps. The 555ES has both fixed and variable outputs, and a Toslink optical output. There is no coaxial digital output.

With Sony's latest flagship single-box player ($1700), we find yet another variant on 1-bit D/A technology—High Density Linear Converter, or HDLC. At the heart of this Pulse Length Modulation (footnote 1) D/A technique is Sony's CXD-2552 Pulse D/A converter (two per channel in complementary mode in the CDP-X77ES). This complex LSI chip incorporates a third-order noise shaper, the PLM converter, and a digital sync circuit receiving its input from the system clock.