Denon PMA-915

Documentation on the Denon PMA-915 is thin, and no production years, original price, or market context have surfaced in the research.

The PMA-915 was rated at 110W + 110W into 8Ω and 150W + 150W into 4Ω, with THD figures of 0.05% at 8Ω rated output and a notably tighter 0.005% at 4Ω. Power bandwidth is listed at 5Hz–30kHz. It's a heavy, solidly built unit at 15.8 kg, measuring 434 × 144 × 438 mm. Audio (October 1996, p.88) listed it among amplifiers of the period, confirming its place in Denon's contemporary range.

The feature set is what you'd expect from a Denon integrated of this class: CD, tuner, aux, and two tape loops (TAPE-1 and TAPE-2/MONITOR), plus a phono input for MM cartridges with a direct phono option. There's a tone defeat switch, tone controls that can be actively bypassed via a Linear Switch, pre-output/main-in terminals for separating the preamp from the power amp, and A/B speaker selection.

What's most interesting from the surviving documentation is the engineering language. The circuit was designed with "meticulous consideration of resistance," and the wiring layout was arranged to directly serve power supply transmission. Denon compressed the structure around the power transformer, treated the chassis itself as a sound-quality mechanism, and reflected the "special twin power structure" even in the switch design. A non-adjusting DC circuit was adopted. These details point to an amplifier where Denon was thinking hard about grounding, power delivery, and mechanical resonance — the kind of obsessive attention that defined their better components of the era.

No reviews, owner impressions, or collectibility data have been found. What's known: