Onkyo P-308

Later, more affordable siblings to the Grand Integra M-510, but bearing the same basic audio engineering design - with a build quality a few of kilos down...

The Integra P-308 sports a Subsonic Feedback Loop between its inputs and outputs to cancel spurious DC, ELF (no Jenna Elfman here, alas, only Extremely Low Frequency) signal components along DC drift and intermodulation distortion - without using coupling caps.

Cardans are set inside to keep short signal paths, and regulated, separate, trafo windings feed each block independently : phono EQ, linear gain, headphone.
Eight inputs are available, with two dedicated to Phono MM cartridges or Phono MC cartridges, each with two-position trims. A contra-bass switch is added for those in need of more (light) guts down below - but only at 200Hz.

The export models had the Line 2 inputs located front, below the attenuator - strange move. The Tape 1 button was however (worldwide) labeled D.A.T. - Onkyo was one year ahead.
Albeit adorned with many a dispensable function, build-quality of the P-308 is tremendously clean.

As in the Grand Integra M-510, Signal In-Phase Filters and Charging Noise Filters iron out differences in current and load between the P-308 and the amplifier - the Integra M-508.

Also gold-plated terminals and a Grand Integra badge. Said badge in the original japanese versions was however placed elsewhere and only said... Integra :)


The P-308 at Onkyo.