Amplificator integrat Accuphase E-470

Full Description

Overview

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.

 

Specs

Rated Continuous Average Output Power (both channels operating simultaneously, 20 – 20,000 Hz): 260 W/ch 4-ohm load; 180 W/ch 8-ohm load

Total Harmonic Distortion (both channels operating simultaneously, 20 – 20,000 Hz): 0.05% 4 to 16 ohm load

Intermodulation Distortion: 0.01%

Frequency Characteristics:

HIGH LEVEL INPUT At rated continuous average output: 20 – 20,000 Hz 0, -0.5 dB

POWER 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: 500 (with 8-ohm load, 50 Hz)

Output Voltage, Output Impedance: PRE OUTPUT 1.51 V 50-ohm (at rated continuous average output)

Gain: HIGH LEVEL INPUT →　PRE OUTPUT: 18 dB; POWER 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 Compensation: ＋6 dB（100 Hz）

Attenuator: －20 dB

Power Meters: Logarithmic peak level indication, shown in dB and %

Load Impedance: 4 – 16 ohms

Stereo Headphones: Suitable impedance: 8 ohms or higher

Power Requirements: 120 V/230 V AC, 50/60 Hz (Voltage as indicated on rear panel)

Power Consumption 92 watts idle; 420 watts in accordance with IEC 60065 611 watts for rated output into 8 ohms