Accuphase :: E-470 Integrated amplifier

Inheriting outstanding technology from Accuphase's 40th anniversary commemorative models, the E-470 represents a full model change from the E-460. Internally, the preamplifier and power amplifier sections are kept entirely separate, in order to allow each to develop their full potential, rivalling the performance and sonic excellence of separate type components. With a simple flick of a switch, the POWER IN feature allows individual use of the two sections. At the heart of the preamplifier section is a further evolved AAVA type volume control, and the power amplifier block is configured with the latest instrumentation amplifier topology, enabling fully balanced signal transmission throughout. The MCS+ approach improves crucial performance parameters by employing multiple identical circuits in parallel, and current feedback provides optimum stability. As a result, the low impedance output stage achieves a damping factor of 500. MOS-FET switches are used in place of relays for speaker protection, helping to ensure superb electrical characteristics and improve long-term reliability. Power MOS-FET devices arranged in triple parallel push-pull pairs for each channel greatly enhance the ability of the amplifier to drive low-impedance loads.

TECHNOLOGY

• Revolutionary AAVA volume control
• Output stage with triple parallel push-pull power MOS-FETs delivers high quality power: 180 watts x 2 into 8 ohms
• Instrumentation amplifier principle for power amplifier input stage allows fully balanced signal transmission, amplifier stage uses current feedback and MCS+ topology
• Logic-control relays for straight and short signal paths
• Robust power supply with large high-efficiency toroidal transformer and filtering capacity

GUARANTEED SPECIFICATIONS (with AD-20 installed)

• Continuous average output power: 180 W/ch (8 ohms, both channels driven, 20 - 20 000 Hz, THD 0,05%)
• Frequency response (1 W output): 3 Hz - 150 kHz +0 -3,0 dB , Damping factor: 500 (EIA  8 ohm, 50 Hz)
• Input sensitivity: 0,15 mV (DISC MC), 3,0 mV (DISC MM), 190 mV (HIGH LEVEL), 1,51 V (MAIN)
• S/N ratio: 123 dB (MAIN), 110 dB (HIGH LEVEL)

MAIN FEATURES

• Recorder switch
• Copy switch
• Tone controls
• Loudness compensator
• Meter operation switch
• EXT PRE selector
• Speaker selector
• Balanced inputs
• Two sets of speaker outputs
• Supplied remote commander
• Maximum dimensions: 465 (W) x 181 (H) x 427 (D) mm 
• Mass: 24,4 kg