Akai AM-A301 (1986)
Japanese-built integrated amplifier from Akai's mid-range A-Series, with a hybrid IC design and heavy construction.
Overview
The Akai AM-A301 is a stereo integrated amplifier made in 1986 by Akai Electric Co., Ltd. in Japan. It belongs to Akai's A-Series and sits between the AM-A201 and AM-A501. It has a clean, detailed sound and a solid build, and vintage audio enthusiasts like it for its reliability and performance. The design is a direct-coupled OCL DC amplifier, and there is a loudness control for listening at low volumes.
Design
The AM-A301 uses a direct-coupled OCL (Output Capacitorless) DC amplifier topology built around STK30x2/STK10x0 hybrid ICs. The power supply is heavy-duty, with a large toroidal transformer. The heat sinks are massive, and the input and output terminals are gold-plated. The driver device is the STK3042-III and the output device is the STK1050A. A loudness control handles tonal shaping at lower volume levels.
Market
A used AM-A301 was listed for $142 with $85.20 shipping, in very good condition and noted to work perfectly after cleaning. Fully restored units can sell for $300-$500 on the vintage audio market. Common problems are failing power supply capacitors, aging solder joints, and heat failure of the STK3042-III and STK1050A devices. Recapping the power supply and adding a heat sink to the STK30x2 chips are recommended for long-term reliability. The NTE1878 from Mouser is a known replacement for the STK3042-III.
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