Accuphase E-650 Class-A Precision Integrated Stereo Amplifier

• First integrated amplifier featuring Balanced AAVA volume control
• Pure Class A operation(30 watts into 8 ohms)
• Guaranteed linear power: 120 watts into 2 ohms, 60 watts into 4 ohms,30 watts into 8 ohms
• The output stage with power MOS-FETs in triple parallel push-pull configuration
• 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 massive high-efficiency transformer and large filtering capacitors
• Preamplifier and power amplifier sections can be used separately
• Numeric indication of volume level

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.

AAVA uses a volume control knob that looks similar to conventional controls. However, Accuphase also paid careful attention to volume sensor construction. The rotary mechanism is assembled with high accuracy and mounted to a highly rigid frame extruded from a single aluminum block. The solid brass shaft has a diameter of 8 mm and gives a pleasingly massive yet responsive operation feel to the volume knob. Floating suspension technology developed by Accuphase for its SA-CD/CD players is used to mount the volume sensor mechanism to the main chassis. Furthermore, utterly smooth and quiet operation is assured also when adjusting the volume with the remote commander, thanks to insulators that dampen any vibrations of the drive motor.

High-efficiency toroidal transformer