The E-650 Integrated Amplifier boasts a robust amplification section that provides ample power to drive even the most demanding speakers. Whether you enjoy classical symphonies, rock anthems, or jazz classics, this amplifier effortlessly reproduces every note with stunning fidelity.
Accuphase's dedication to audio purity is evident in the E-650's advanced signal processing and filtering. Its ultra-low distortion and noise levels ensure that your music remains faithful to the original recording, allowing you to hear the artist's intentions with unprecedented clarity.
The E-650 has a Pure Class A operation (30 watts into 8 ohms). It's guaranteed linear power: 120 watts into 2 ohms, 60 watts into 4 ohms, 30 watts into 8 ohms; and the preamplifier and power amplifier sections can be used separately.
Balanced AAVA volume control
One of the key features of the E650 is its Dual Balanced AAVA volume control system. AAVA stands for "Accuphase Analog Vari-gain Amplifier," which is a proprietary technology that provides precise and accurate volume control with minimal noise and distortion. The Dual Balanced AAVA system uses two separate AAVA circuits for left and right channels, which helps to maintain perfect channel balance and stereo imaging.
Output stage with power MOS-FETs in triple parallel push-pull configuration
Triple parallel push-pull output stage with power MOS-FETs and power amplifier stage mounted on a large heat sink. Two identical units are arranged on the left and right sides of the chassis.
Balanced I/O
Instrumentation amplifier principle in power amplifier for fully balanced signal transmission, complemented by MCS+ topology and current feedback amplification circuitry
Strong power supply with massive high-efficiency toroidal transformer and large filtering capacitors.
The E-650 uses a massive power transformer with high output capability. Highly effective filtering is realized with two custom-made aluminum electrolytic capacitors, each with a large 50,000 μF rating.
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Rated Continuous Average Output Power (both channels operating simultaneously, 20 - 20,000 Hz): 150 W/ch 1-ohm load (music signal only), 120 W/ch 2-ohm load, 60 W/ch 4-ohm load, 30 W/ch 8-ohm load
Total Harmonic Distortion (both channels operating simultaneously, 20 - 20,000 Hz): 0.05% 2-ohm load, 0.03% 4 to 16 ohm load
Intermodulation Distortion: 0.01%
Frequency Response: HIGH LEVEL INPUT, At rated continuous average output: 20 - 20,000 Hz ＋0, –0.5 dB, MAIN IN, At rated continuous average output: 20 - 20,000 Hz ＋0, –0.2 dB, At 1 watt output:3 - 150,000 Hz ＋0, –3.0 dB
Damping Factor: 800 (with 8-ohm load, 50 Hz)
Input sensitivity and impedance (rated output/1W output/Impedance): High Level input -77.7mV/14.2mV/20kΩ, Balanced Input -77.7mV/14.2mV/40kΩ, Main In Line-0.617V/113mV/20Ω, Main In Balanced -0.617V/113mV/40kΩ
Output Voltage and Impedance: PRE OUTPUT 0.617 V, 50 ohms (at rated continuous average output)
Gain: HIGH LEVEL INPUT → PRE OUTPUT :18 dB, MAIN IN → OUTPUT: 28 dB
Tone Controls - Turnover frequency and adjustment range: BASS; 300 Hz ±10 dB (50 Hz),TREBLE; 3 kHz ±10 dB (20 kHz)
Loudness compensator: ＋6dB（100 Hz)
Attenuator: ─20 dB
S/N Ratio, Input-converted Noise (SN ratio at rated output/SN ratio EIA): High level Input - 102dB/97dB, Balanced input - 102dB/97dB, Main In - 117dB/101dB
Bar Meter: Represents output voltage value (dB) using 26 points With meter on/off switching function
Output Load Impedance: 2 to 16 ohms
Stereo Headphones Suitable impedance: 8 ohms or higher
Power Requirements: 230v AC, 50Hz
Dimensions (WxHxD, mm): 465 x 191 x 428
Weight: 25.3kg net, 32kg shipped