Harman/Kardon 730 ft. Onkyo Model 931 | Harman kardon, Hifi, Audio room
stereonomono - Hi Fi Compendium - 13 years on-line: Onkyo Model 931
Onkyo Europe - The Integra 931 power amplifier, released in 1972, was part of the Integra 725 system and attracted considerable attention with its steam-locomotive-like design featuring an exposed transformer and heat