
Accuphase E-650 - Integrated Stereo Amplifier
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Innovative engineering and top-grade parts and materials come together in this product featuring the superb Balanced AAVA type volume control and a triple parallel arrangement of power MOS-FETs in the output stage. The power amplifier section employs the latest instrumentation amplifier configuration for balanced signal transmission, resulting in an integrated amplifier with fully balanced configuration from the inputs right through to the output. The massive power supply and low-impedance output circuitry deliver 150 watts per channel (into 1 ohm, with music signal) and a damping factor of 800.
1 year manufacturer's warranty
INTEGRATED STEREO AMPLIFIER
Innovative engineering and top-grade parts and materials come together in this product featuring the superb Balanced AAVA type volume control and a triple parallel arrangement of power MOS-FETs in the output stage. The power amplifier section employs the latest instrumentation amplifier configuration for balanced signal transmission, resulting in an integrated amplifier with fully balanced configuration from the inputs right through to the output. The massive power supply and low-impedance output circuitry deliver 150 watts per channel (into 1 ohm, with music signal) and a damping factor of 800.
Balanced AAVA volume control
As a first in an integrated amplifier, the E-650 features the sophisticated balanced AAVA type volume control incorporated in Accuphase's top-of-the-line preamplifier model C-3850. Balanced AAVA uses two AAVA circuits driven in a fully balanced configuration. This completely cancels out any external noise and results in an unsurpassed S/N ratio.
The 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 the power amplifier for fully balanced signal transmission, complemented by MCS+ topology and current feedback amplification circuitry
Strong power supply with a 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.
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 |
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 |
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 |