Accuphase E-380 - Class AB Integrated Stereo Amplifier 120w/ch

- Key Features
  
  Incorporates the advanced “AAVA” (Analog Vari-gain Amplifier) volume control, which avoids using traditional resistive attenuation and helps maintain the full signal integrity through the volume range.
  
  Power-amplifier section uses bipolar transistors in a double parallel push-pull configuration and is arranged as an instrumentation amplifier for very low noise and excellent signal-to-noise ratio.
  
  The output stage is designed for low output impedance, giving a damping factor of 500 (8 Ω, 50 Hz), which aids in driving demanding loudspeaker loads.
  
  Rated output: 120 W per channel into 8 Ω, and 180 W per channel into 4 Ω (both channels driven) — representing about a 20 % increase in power over its predecessor.
  
  Strong power supply design: large high-efficiency transformer, big filter capacitors (~33,000 µF), and MOS-FET-based speaker protection switches to enhance reliability and signal purity.
  
  Modular functionality: includes MAIN IN to allow use of the power amplifier section alone, and slots for optional boards (phono, DAC) depending on model/region.

Description

The E-380 realizes a 20% increase in rated output power thanks to a reinforced power amplification stage and power supply. The further evolved AAVA volume control system allows music enjoyment at any level without even the slightest degradation of signal quality. The power amplifier section utilizes the instrumentation amplifier principle to achieve an outstanding S/N ratio. The low impedance design of the output circuitry results in a damping factor of 500, ensuring that the potential of every speaker can be brought out to the fullest. Enjoy a musical performance of amazing transparency and dynamism.

Warranty:

1-year manufacturer’s warranty

Features:

AAVA volume control
Power amplification stage with bipolar transistors in a double parallel push-pull configuration
Rated for 180 watts into 4 ohms and 120 watts into 8 ohms
The high damping factor of 500
Power amplification stage configured as an instrumentation amplifier
Current feedback amplification topology in the power amplification stage
Logic-control relays for shortest signal paths
Strong power supply with a massive high-efficiency transformer and large filtering capacitors
Protection circuitry using MOS-FET switches

INTEGRATED STEREO AMPLIFIER
The E-380 realizes a 20% increase in rated output power thanks to a reinforced power amplification stage and power supply. The further evolved AAVA volume control system allows music enjoyment at any level without even the slightest degradation of signal quality. The power amplifier section utilizes the instrumentation amplifier principle to achieve an outstanding S/N ratio. The low impedance design of the output circuitry results in a damping factor of 500, ensuring that the potential of every speaker can be brought out to the fullest. Enjoy a musical performance of amazing transparency and dynamism.

Power supply circuitry designed for optimum stability
The large transformer and massive 33,000 μF filtering capacitors with 10% more capacitance provide rock-stable, high-quality power

Power amplification stage with bipolar transistors
The power amplification stage features bipolar transistors in a double parallel push-pull configuration

Option Boards
The rear panel expansion slot allows for use of one of the available AD-30 (phono preamplifier) or DAC-40 (digital to analog converter) option boards

Technical Specifications:

Continuous Average Output Power (20 – 20,000 Hz)	(both channels driven)	8-ohm load 4-ohm load	120W 180W
THD (20 – 20,000 Hz)	(both channels driven)	4 to 16 ohm load	0.05%
Intermodulation Distortion	0.01%
Frequency Response	HIGH-LEVEL INPUT At rated continuous average output: 20 – 20,000 Hz ＋0, –0.5 dB MAIN IN At rated continuous average output: 20 – 20,000Hz (+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)
Input Sensitivity and Impedance	Input Input sensitivity For rated output for 1 Watt (EIA) Input impedance HIGH LEVEL INPUT 155 mV 14.2mV 20 kilohms BALANCED INPUT 155mV 14.2mV 40 kilohms MAIN IN 1.23V 113mV 20 kilohms
Output voltage Impedance	PRE OUTPUT 1.23 V 50 ohms (at rated continuous average output)
Gain	HIGH LEVEL INPUT → PRE OUTPUT: 18 dB 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 compensator	#ERROR!
Attenuator	-20dB
S/N Ratio, Input-converted Noise	Input S/N ratio at rated output (A-weighted, with input shortened) S/N ratio (EIA) HIGH LEVEL INPUT 109dB 99dB BALANCED INPUT 98dB 98dB MAIN IN 124dB 102dB
Power Meters	Logarithmic type peak level display of output in dB or percent
Output Load Impedance	4 to 16 ohms (terminals A or B driven) 8 to 16 ohms (terminals A and B driven simultaneously)
Stereo Headphones	Suitable impedance: 8 ohms or higher
Power Requirements	120 V/220 V/230 V AC (Voltage as indicated on rear panel), 50/60 Hz
Power Consumption	46W idle 292W in accordance with IEC 60065
Maximum Dimensions	Width 465 mm ( 18.31″) Height 171 mm ( 6.73″)a Depth 422 mm (16.61”)
Mass	22.8 kg (50.3 lbs) net 29.0 kg (63.9 lbs) in shipping cart