Yamaha A-520 (1985–1986)
A solid-state integrated stereo amplifier from Yamaha’s mid-1980s lineup, delivering 75 watts per channel with low distortion.
Overview
The Yamaha A-520 is a natural sound stereo integrated amplifier produced from 1985 to 1986. It belongs to a series that includes the A-320, A-420, A-720, and A-1020, sitting between the earlier A-500 and its successor, the AX-500. Designed for high-fidelity audio reproduction, the A-520 features Yamaha’s ZDR (Zero Distortion Rule) technology and delivers clean, warm sound favored by users for driving demanding speakers. It includes a Direct-MC input, likely indicating a dedicated moving coil phono stage.
Specifications
| Power output | 75 watts per channel into 8Ω (stereo) |
| Frequency response | 20Hz to 20kHz |
| Total harmonic distortion | 0.01% |
| Damping factor | 150 |
Design
The amplifier features a Direct-MC input, as noted in the Yamaha PDF manual header, suggesting specialized circuitry for moving coil phono cartridges.
Context
The A-520 was part of a broader Yamaha amplifier family that included the A-320, A-420, A-720, and A-1020. It replaced the A-500 and was succeeded by the AX-500, positioning it as a mid-tier model in Yamaha’s 1985–1986 integrated amplifier range.
Market
Originally priced at $272.99, the A-520 has seen recent resale interest, with one unit listed for $2,000 on Facebook. A service manual is available, often containing technician notes with repair tips and pricing. Some units in circulation have been modified, including capacitor upgrades.
eBay Listings
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