Accuphase E-380

Introduction to the Accuphase E-380 Stereo Integrated Amplifier

The Accuphase E-380 is a high-end stereo integrated amplifier designed to deliver exceptional audio performance. As the successor to the highly acclaimed E-370, this new amplifier features numerous technical enhancements aimed at pushing the boundaries of high-fidelity even further.

An Optimized Power Amplification Stage

The heart of the E-380 lies in its power amplification stage, which uses bipolar transistors in a double parallel push-pull configuration. This topology allows it to deliver a generous power output of 2x120W at 8 Ω and 2x180W at 4 ohms, while maintaining an extremely low distortion rate of less than 0.05%.

This power stage is configured according to the principle of an instrumentation amplifier, ensuring an exceptional signal-to-noise ratio. Additionally, the very low impedance design of the output circuit results in a damping factor of 500. This means the amplifier exercises extremely precise control over the speakers, fully exploiting their potential.

Next-Generation AAVA Volume Control

The Accuphase E-380 benefits from the latest evolution of the AAVA (Accuphase Analog Vari-gain Amplifier) volume control system. This exclusive technology eliminates any variable resistance from the audio signal path. Instead, it uses a combination of 16 voltage-to-current converter circuits.

Unlike traditional potentiometers, AAVA introduces no impedance changes, thus preserving an optimal signal-to-noise ratio without altering frequency response, regardless of the chosen listening level. On the E-380, this system has been refined with four parallel AAVA modules (instead of two on the E-370) to further reduce background noise.

Comprehensive and Expandable Connectivity

In terms of connectivity, the Accuphase E-380 offers 5 RCA line inputs and 2 XLR line inputs. The CD input is also complemented by an additional balanced input. There is also a recorder input and output in RCA format.

But the versatility of this amplifier doesn’t stop there. Thanks to its Pre-Out and Main-In jacks, the preamplifier and power amplifier sections can be used separately. This allows for the addition of an external preamp or power block.

Finally, two slots at the rear allow for the insertion of optional extension cards, such as a high-resolution USB DAC or an MM/MC phono preamp. This enables the E-380 to evolve according to needs.

Premium Construction for Performance

The build quality of the Accuphase E-380 commands respect. Its robust chassis houses an oversized power supply with a high-efficiency transformer and large filtering capacitors. Everything is designed to provide an unshakeable foundation for amplification.

Inside, the symmetrical design and ultra-short signal paths, enabled by switching relays, preserve the integrity of delicate signals. MOS-FET transistors ensure speaker protection without degrading sound quality.

Even the headphone experience is not overlooked, with a dedicated amplifier and a 6.35 mm jack on the front. A true testament to versatility.

Sound Reproduction of Rare Transparency

When listening, the Accuphase E-380 impresses with its ability to reproduce the finest details of recordings with remarkable transparency and coherence. The soundstage extends in all dimensions with striking realism.

This amplifier knows how to fade into the background to let the personality of the speakers and other components shine. The timbres are exemplary in accuracy, and the attacks are impressively lively. When the music demands it, the E-380 delivers its full power with sovereign ease, never losing control.

It is this perfect blend of finesse, transparency, and authority that makes the Accuphase E-380 one of the very best integrated amplifiers in its category. A true conduit of emotions in the service of music.

Frequently Asked Questions

What are the main differences between the Accuphase E-380 and its predecessor, the E-370?

The E-380 stands out from the E-370 with increased power (2x120W at 8 Ω compared to 2x100W), an improved signal-to-noise ratio by 2 dB, and a 25% higher damping factor reaching 500. The AAVA volume control has also been refined with 4 parallel modules instead of 2.

Does the Accuphase E-380 allow for connecting different sources, including digital ones?

Absolutely. In addition to its 7 analog inputs, the E-380 has two slots that can accommodate optional cards, such as a 32-bit / 384 kHz USB DAC and 11.2 MHz DSD or an MM/MC phono preamp. This allows it to adapt to all types of sources.

Is it possible to use the preamplifier and power amplifier sections of the E-380 separately?

Yes, the Accuphase E-380 is equipped with Pre-Out and Main-In jacks that allow the preamplifier and power amplifier sections to be separated. This enables the addition of an external preamp or power block for even more flexibility.

What are the advantages of the Accuphase E-380’s amplification stage?

The power stage of the E-380 uses a bipolar transistor configuration in double parallel push-pull. It delivers 2x120W at 8 Ω with very low distortion (< 0.05%). Designed as an instrumentation amplifier, it offers an optimal signal-to-noise ratio. Its very low output impedance ensures precise speaker control with a damping factor of 500.

Is the Accuphase E-380 suitable for headphone listening?

Yes, the E-380 includes a dedicated headphone amplifier with a 6.35 mm jack on the front. Regardless of the headphone impedance, it will bring out the best, benefiting from the quality of the upstream stages (AAVA volume control, balanced input stage, etc.). A commendable versatility.

How is the sound reproduction of the Accuphase E-380 characterized?

The Accuphase E-380 is distinguished by its highly transparent reproduction, which faithfully respects the musical message. The soundstage is expressed in all its dimensions with breathtaking realism. This amplifier combines finesse, accurate timbres, and dynamics, while delivering abundant power when necessary. A true conduit of emotions.

Technical Specifications

Architecture

• Power amplification stage with bipolar transistors
• High damping factor of 500
• AAVA volume control
• Dedicated headphone amplifier with 6.35 mm front jack output
• Two expansion slots on the rear panel for optional cards

Audio Performance

• Output power:
  • 2 × 180 W / 4 Ω
  • 2 × 120 W / 8 Ω
• Total harmonic distortion: 0.05% (4 to 16 Ω)
• Intermodulation distortion: 0.01%
• Frequency response: 20 - 20,000 Hz (+0, -0.5 dB)
• Signal-to-noise ratio: up to 124 dB

Features and Settings

• Tone controls: bass (300 Hz ± 10 dB), treble (3 kHz ± 10 dB)
• Loudness compensation: + 6 dB (100 Hz)
• Attenuator: - 20 dB
• Phase and speaker selector
• Volume level display with mode selector
• Separate preamplifier and power amplifier sections

Connectivity

• Inputs: 5 × RCA connectors, 2 × XLR connectors, 1 × RCA recording, 1 × RCA main input
• Outputs: 1 × RCA recording, 1 × RCA preamplifier output
• A/B speaker binding posts
• Compatible with speakers from 4 to 16 Ω and headphones of 8 Ω or more

Physical Characteristics

• Dimensions (W × H × D): 465 × 171 × 422 mm
• Weight: 22.8 kg

Supplied Accessories

• Power cable (2 m)
• RC-250 remote control