News of yet another boxed-set of previously unissued Miles recordings never fails to zap the juices of anticipatory pleasure—and Sony's vaults, in particular, hold a lot of them. The latest, The Bootleg Series, Vol. 4: Miles Davis at Newport, 1955–1975 (Columbia Legacy), contains four CDs chronicling eight sessions from his appearances at the Newport Jazz Festival.

The availability of the Pacific Microsonics High Definition Compatible Digital (HDCD®) PMD100 decoder chip, manufactured by San Jose's VLSI Technology, has brought about a minor revolution in Compact Disc playback. It brings sonic improvements in imaging, soundstaging, and resolution of detail. In the past six months, Stereophile has published a number of reports on the HDCD decoder's operation, what HDCD recordings are available, and the improvements brought by the HDCD chip to specific digital audio processors (footnote 1). High-end manufacturers are incorporating the $40 HDCD chip in their newest decoders, including the $4695 Sonic Frontiers SFD-2 Mk.II D/A processor, the $15,950 Mark Levinson No.30.5, and the $8195 Spectral SDR-2000 Professional HDCD D/A Processor (reviewed in Vol.18 No.5).

While the AT-OC9 bears the Audio-Technica logo, you won't find a sample of this moving-coil cartridge at your friendly Audio-Technica dealership. The US distributor of Audio-Technica products has apparently decided that their market does not include high-end cartridges. A quick perusal of the latest Audio directory issue (October 1988) lists the most expensive AT cartridge at $295, with no moving-coils in sight. When I first heard of the AT-OC9, the only reasonably accessible source, short of Japan, was Audio-Technica in the UK. A quick phone call and follow-up letter resulted in a review sample. Since that time, Music Hall in the US importers of the Epos loudspeakers, among other items) has begun importing the AT-OC9 (along with the less-expensive AT-F5). Mail-order company Lyle Cartridges also stock it, I believe.

GamuT’s impressive-sounding RS7 tower graces the cover, while inside the issue, the full reviews feature Vinnie Rossi’s unique LIO integrated amplifier, AudioQuest’s intriguing JitterBug, B&W’s affordable 683 S2 speaker, and the high-performance Acoustic Signature Triple X turntable. We take a second look at Wilson Benesch's high-performance minimonitor; assemble three high-performance desktop systems at three price levels; offer three cost-free tips for getting the best from your system; and interview iconic English singer/songwriter/guitarist Richard Thompson. And there’s more—much more.