Included are the Matsushita / National PCC88 / 7DJ8 cryo'd platinum grade from Upscale audio under 1000 hours. * Gain reduced by 14 db with Audio Research kit fine by authorized service center to 41db gain.
Sounds outstanding. I purchased it pre-owned and now upgraded.
* Below is the description from ARCDB.
The higher-cost PH3 Special Edition is identical in circuit design to the standard PH3 phono preamplifier, with the
exception that more than 100 different parts upgrades have been made to the SE version, including costly Infinicaps in
both audio circuits and power supply regulators, high-performance soft-recovery rectifiers, Holco resistors in key
locations, gold tube sockets, proprietary Audio Research damping rings, extended chassis damping, and more. The sonic
improvements are significant in every respect, yielding better soundstage focus, more musical bloom and richness,
greater dynamic expression and more impact and control at the frequency extremes. A factory upgrade program for
standard PH3 owners is also available.