Accuphase E-407 - User Manual

INTEGRATED STEREO AMPLIFIER
E-407
m Triple parallel push-pull output stage delivers quality power: 180 watts × 2 into 8
ohms m Current feedback principle combines superb sound with total operation stability
m Logic-controlled relays for shortest signal paths m Separator switch allows
independent use of pre/power sections m Large toroidal power transformer m Balanced
inputs m Option board available for playback of analog records

Accuphase E-407 Specifications

General

Type	Integrated Amplifier
Power Output	170 watts per channel into 8 ohms (stereo), 240 watts per channel into 4 ohms (stereo)
Total Harmonic Distortion (THD)	0.05%
Input Sensitivity	0.5mV (MC), 4mV (MM), 250mV (line)
Signal-to-Noise Ratio	76dB (MC), 90dB (MM), 107dB (line)
Dimensions	440 x 170 x 420 mm
Weight	22.5kg
Speaker load impedance	4 to 16 ohms
Output	Speakers

Summary

Accuphase E-407 Amplifier Overview

Key Performance Features

Highlights of the E-407's advanced technologies and power capabilities.

Front Panel Controls

Description of the controls and indicators on the front panel.

Amplifier Design and Technology

Triple Parallel Push-Pull Output Stage

Details on the output stage design for high-power audio delivery.

Current Feedback Topology

Explanation of the current feedback principle for sonic performance.

Discrete Line Amplifier

Describes the discrete-component line amplifier for sonic purity.

Logic-Controlled Relays

Relays ensure short signal paths and reliable switching.

Power Supply and Audio Control Features

Large Toroidal Power Transformer

Details the high-capacity power supply for ample reserves.

Tone Controls and Loudness

Explains the summing active filter tone control and loudness compensation.

Analog Peak Power Meters

Describes the logarithmic compression meters for dynamic range monitoring.

Headphone Amplifier

Dedicated amplifier for the headphone jack providing superior sonic performance.

Connectivity and Specifications

Versatile Input Configuration

Details the input selector and balanced connectors for versatile use.

Option Boards

Describes available optional input boards for expanded functionality.

Guaranteed Specifications

Lists the technical specifications measured according to EIA standards.

Front and Rear Panel Layout

Diagrams and labels for front and rear panel components.