Accuphase E-212 (1981)
Integrated stereo amplifier introduced in 1981 with current feedback topology, dual-mono design, and modular option board support
Overview
The Accuphase E-212 is an integrated stereo amplifier from Accuphase Laboratory, Inc., introduced in 1981. It has a current feedback circuit, a parallel push-pull output stage, and a discrete Class A preamplifier section. Logic-controlled relays handle signal routing. The volume control is motor-driven. Tone controls cover bass, mid, and treble, and there is a loudness switch and a subsonic filter. Option boards add either digital signal input or high-quality analog disc reproduction. The front panel carries INPUT, VOLUME, and SP/TONE/BAL/TAPE knobs, a headphone jack, and POWER, TONE, ATT, and MONO push-buttons. The rear panel has XLR (Canon) receptacles. The E-212 succeeded the E-202 and sat above the E-205 in the product lineup.
Specifications
| Power output | 90 watts per channel into 8 ohms |
| Power output | 105 W/ch into 6Ω (both channels driven, 20–20,000Hz) |
| Power output | 115 W/ch into 4Ω (both channels driven, 20–20,000Hz) |
| Frequency response | 20Hz to 20kHz |
| Total harmonic distortion | 0.05% |
| Signal to noise ratio | 110dB |
| Damping factor | 50 |
| Dimensions (W x H x D) | 475 x 145 x 365 mm |
| Weight | 19.5 kg |
| Inputs | Phono MC, Phono MM, Tuner, Aux, Tape 1, Tape 2 |
| Outputs | Rec Out, Pre Out, Headphones |
| Phono overload | 180mV (MM), 18mV (MC) |
| Phono S/N ratio | 86dB (MM), 76dB (MC) |
| Voltage selector | 100V, 120V, 230V |
| Remote control model | RC-23 |
| Remote control battery type | R6/UM3 |
Design
The E-212 is a dual-mono design with two power transformers and four 15,000µF power supply capacitors. The power amplifier stage is DC-coupled. The preamplifier section is a discrete Class A design. The amp is built from separate assemblies: Power Amp, Volume, Input Selector, Logic, Tone Volume, Power Transformer, Protection, and Thermal Switch. To change the voltage, you switch and solder wires and replace the fuse. That supports 100V, 120V, or 230V operation.
Context
Accuphase positioned the E-212 above the E-205 as a "Classic Model," and it succeeded the E-202. It was designed for high performance, with modular expandability and the high gain typical of Accuphase integrated amplifiers.
Market
A fully working E-212 in good condition was expected to cost around GBP 1400-1500 in the UK as of early 2021. Some units may face regional service restrictions. Components sold in Portugal, for example, are eligible for service only through Accuphase Portugal.
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Service Manuals, Schematics & Catalogs
- Service Manual — audiocircuit
- Catalog — archive.org
- Catalog (1991) — archive.org
- Catalog (1992) — archive.org