Accuphase E-213 (2005)

Integrated pre-main amplifier released in April 2005 with MCS circuitry and 115W/ch output into 4Ω.

Overview

The Accuphase E-213 is an integrated amplifier. Preamp and power amp share one chassis. It came out in April 2005 as part of the E-200 series. It delivers 115 watts per channel into 4 ohms, with total harmonic distortion of just 0.04% across a 4 Ω ~ 16 Ω load. It takes high-level, balanced, and main inputs. The tone controls give ±10 dB adjustment at 300 Hz and 3 kHz, and the loudness compensator adds +6 dB at 200 Hz when volume is set to -30 dB.

Specifications

Power Output	115W/ch (4 Ω), 105W/ch (6 Ω), 90W/ch (8 Ω)
THD	0.04% (4 Ω ~ 16 Ω load)
Frequency Response	20 Hz ~ 20 kHz ±0 -0.2 dB (rated output); 2 Hz ~ 150 kHz +0 -3.0 dB (1W output)
Input Sensitivity / Impedance	High Level: 213mV/22.5mV / 20k Ω; Balanced: 213mV/22.5mV / 40k Ω; Main: 1.07V/113mV / 20k Ω
Dimensions	475 mm (W) × 150 mm (H) × 422 mm (D)
Weight	18.8 kg
Power Supply	100 VAC, 50/60 Hz
Power Consumption	43W (no input), 230W (regulatory), 345W (at 8 Ω rated output)

Design

Both the preamp and the power amp use Accuphase’s MCS (Multiple Circuit Summing-up) circuitry. Two independent amplifier circuits process the same signal with shared feedback, and their outputs are summed. The preamp uses parallel amplifiers in a complete MCS configuration. The power amp uses a current feedback design with multi-emitter power transistors in parallel push-pull. Signal switching is done by gold-plated, closed-type communication relays under logic control. The tone control is a fully additive active filter system. The meter is an analog logarithmic peak power meter with dB/% display. Power comes from a large 400 VA transformer and two 22,000 μF filter capacitors, mounted with heat-conductive, anti-vibration filler. There is an EXT-PRE switch and power amp input terminals for using an external preamp. The unit also has a large speaker terminal, high carbon cast iron insulators on the feet, and a wireless remote control (RC-23). An optional board adds digital input and analog record playback.