Onkyo Grand Integra P-308 (c. 1987)

Name: Integra P-308
Brand: Integra

Documentation on the Integra P-308 is thin, but the period record does show what it was: a full-featured preamplifier in Onkyo's "Grand Integra" series, sold alongside the M-508 power amplifier as a matched pair. Onkyo's own advertising in Audio (May 1987, p.5) pitched the pair as control flexibility and sound quality at a reasonable price - "superb sound quality" with the M-508's 200W/channel output.

The one genuine review of the P-308 ran in Audio's Auricle column (September 1987, p.102). The reviewer put the P-308 and M-508 in Onkyo's push toward a high-end line. They wore the "high-end character" - strong styling and feel - while staying at "relatively moderate" prices. The P-308 was listed at $630 and described as a full-featured audiophile preamp with a phono pre-preamp stage. The review doesn't cover dimensions, weight or circuit topology, and no production year range has surfaced.

The known facts, such as they are:

Preamplifier with built-in phono "pre-preamp" stage (Audio, Sept 1987, p.102)
Original price: $630
Part of Onkyo's Grand Integra series, paired with the M-508 power amplifier; the M-508 shared design concepts with Onkyo's flagship M-510 (Audio, May 1987, p.5)
A later 1992 preamp directory in HiFI-Stereo (p.135) shows the Integra line continuing with a P-301 model