Accuphase E-4000 Integrated Stereo Amplifier



The E-4000 integrated amplifier is the successor to Accuphase's highly regarded E-480. Noise levels are significantly lower, with the E-4000 being around 20% less than its predecessor, thanks to a revised AAVA volume control system and ANCC circuit.

Power is nothing without control though, and a guaranteed damping factor of 800 gives full command of your speakers to realise their full potential. The E-4000 delivers an impressive 33% DF increase over the already excellent E-480. 

Accuphase E-4000 Integrated Stereo Amplifier

Option Boards

A range of sophisticated option boards opens up even more possibilities. The Accuphase DAC Input Board features a USB port and support for high-bit, high-sampling frequency signals up to 192 kHz/24 bits. The newly developed Analog Disc Input Board AD-50 is also available, ideal for high-grade reproduction of analog records using either MC or MM phono cartridges.

Accuphase E-4000 Integrated Stereo Amplifier

Balanced AAVA Volume Control

Conventional preamplifiers use variable resistors to adjust volume, which causes contacts to deteriorate and create grit as well as increase noise at normal volume levels. AAVA, however, produces multiple, widely varying signals from the input signal and controls volume by changing the combination of those signals. This achieves minimum noise at all volume levels without any grit. The E-4000 with its balanced AAVA circuits delivers exceptional noise suppression performance.


• Improved AAVA volume control for ultra low noise levels

• Power transistor, 4 parallel push-pull Class AB operation

• Damping factor of 800

• High power of output 180W/8Ω, 260W/4Ω

• Speaker output protection circuit to prevent short circuits

• Strong power supply with a massive high-efficiency toroidal transformer and large filtering capacitors

• Play high-resolution audio sources from digital devices with the digital input board  DAC-60 (sold separately)

• Play analog records with the  AD-50 analog disk input board (sold separately)

Continuous Output RMS (20-20,000 Hz): 260 watts per channel into 4 ohms, 180 watts per channel into 8 ohms

Total Harmonic Distortion (20-20,000 Hz): 0.05% with 4 to 16 ohm load

Intermodulation Distortion: 0.01%

Frequency Response: 20 - 20,000 Hz (+0, -0.2 dB)

Damping Factor: 800 (8-ohm load)

Output Voltage and Impedance (Pre Output): 1.51 V, 50 ohms

Gain (High-Level Input > Pre Output): 18 dB

Gain (Main 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

Output Load Impedance: 4 - 16 ohms

Stereo Headphones: Suitable impedance: 8 ohms or above

Power Requirements: AC 230V 50/60 Hz

Power Consumption: 54 watts, idle 410 watts

Maximum Dimensions (W x H x H): 465 mm x 181 mm x 428 mm

Mass: 24.4 kg (Net)

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