The Luxman L-530 is an integrated amplifier that was released in October 1981. It features the DUO β circuit, which eliminates the pre-drive stage of the power amplifier circuit. Utilizing a low-noise FET parallel push-pull input connected to a differential cascode, the amplifier displays excellent bare characteristics, including a high signal-to-noise ratio and a low distortion factor. The output stage employs parallel push-pull Ring Emitter Transistors (R.E.T.) for high-speed switching, allowing for a Class A operation range of up to 15W per channel and a Class AB maximum output of 120W per channel. The amplifier includes a robust Sky-Fin type heat sink for effective heat dissipation. It has an open-loop gain switching type equalizer compatible with both moving coil (MC) and moving magnet (MM) cartridges, enhancing user convenience. A phono straight function enables effortless switching to disk playback. The tone control provides six selectable turnover frequencies for both low and high frequencies, and unique NFB circuit characteristics allow for sound quality adjustments without generating additional noise. The power supply contains a large transformer of 320 VA capacity and 30,000 μF block capacitors for extended performance. Additional features include a warm-up indicator for stable sound quality, and a line phase sensor to unify AC power polarity.
