A390 Integrated Amplifier — Precision Power with VCIA™ Technology

A390 is more than an integrated amplifier; it represents our ongoing exploration of amplification technology and the reproduction of music itself.

VCIA™ is not about adding complexity, but about bringing the amplifier closer to an ideal state of operation.

Through its Voltage & Current Isolated amplification architecture, the A390 allows each amplification stage to operate under optimal conditions, achieving a purer, more precise, and more refined musical performance.

Maximum Performance, Minimal Size

Eleven Audio proudly introduces the new A390 integrated amplifier.

The A390 is more than an integrated amplifier; it represents our continued exploration of amplification technology and the reproduction of music itself.

Built upon Eleven Audio’s proprietary VCIA™ (Voltage & Current Isolated Amplify) architecture, the A390 rethinks the traditional approach to amplifier design. By separating voltage and current amplification stages, it enables each stage to operate under optimal conditions, resulting in a purer, more precise, and more stable musical performance.

Whether paired with bookshelf speakers, desktop systems, or more demanding high-end audio setups, the A390 delivers a refined, natural, and emotionally engaging musical presentation.

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39 Watts, By Design

The A390 is rated at 39W × 2 into 8Ω.

This is not a specification driven by power competition, but a deliberate design choice based on real-world listening environments.

In typical home audio systems, the average listening power is far below an amplifier’s maximum output. What truly defines sound quality is performance at low power levels — where linearity, control, and fine detail matter most.

For this reason, the A390 is designed around the region where music actually lives:

the “first watt.

”Through VCIA™ architecture and precision circuit design, the A390 maintains excellent channel balance, ultra-low distortion, and full musical detail even at low listening levels.

The 39W output provides sufficient dynamic headroom, while avoiding unnecessary compromises in sound purity made for the sake of higher numbers.

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Core technologies VCIA™
Voltage & Current Isolated
Amplify

Traditional amplifiers typically handle both voltage and current amplification within the same circuit stage.However, the interaction between voltage and current during operation can cause nonlinear distortion, intermodulation distortion, and additional interference.The Eleven Audio VCIA™ architecture completely separates these two stages:

▸ Voltage amplification stage focuses on precise gain and linearity
▸ Current amplification stage focuses on drive capability and load control

Through voltage and current isolation, each amplification stage operates closer to its ideal state.

The result is:

▸ Lower distortion
▸ Higher transparency
▸ More accurate musical detail
▸ More stable speaker control

Even with complex musical signals or reactive speaker loads, the A390 maintains a natural, stable, and highly realistic sound.

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VCIA™ Technological advantages

1. Reduce voltage and current coupling interference

In traditional architectures, simultaneous changes in voltage and current can easily lead to mutual interference.

VCIA™ separates the two operating regions, allowing each amplification stage to perform its own task, significantly reducing interference and nonlinear errors.

2. Improve linearity and sound purity

The voltage amplification stage can be optimized for gain accuracy.

The current amplification stage can focus on output control and load driving.

This division of labor allows the A390 to deliver a more detailed and transparent sound.

3. Reduce intermodulation distortion (IMD)

Music signals contain a large number of different frequency components.

When different signals interfere with each other during amplification, intermodulation distortion can easily occur.

The VCIA™ architecture reduces signal coupling, preserving musical details and allowing complex arrangements to still present clear layers.

4. Excellent thermal stability

Current amplification is typically accompanied by high heat generation.

Through its independent architecture, VCIA™ effectively manages thermal effects, enabling amplifiers to maintain stable performance during extended operation.

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Precision Engineering Design

The A390's amplification core utilizes over 300 carefully selected components per channel.

The entire unit comprises over 1000 parts, rigorously configured and calibrated.

Through modern control theory analysis, the circuit zeros and poles are precisely set, enabling the A390 to maintain high stability even under complex speaker loads.

This is not merely a design choice for power output, but a pursuit of sonic precision.

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Technical Highlights

1. Class AB + VCIA™ Unique amplifier architecture

Combining the proven reliability of traditional Class AB with Eleven Audio's proprietary VCIA™ technology, it delivers a pure, accurate, and musical sound.

2. High-resolution, low-distortion sound quality

The A390's low distortion and high linearity design allow it to fully reproduce the subtle changes in music.

From delicate airy sensations to powerful dynamics, everything remains natural and fluid.

3. R-2R Electronic volume control

The preamplifier employs high-precision R-2R electronic volume control.

Compared to traditional carbon film potentiometers:

▸ Lower distortion
▸ Better left and right channel consistency
▸ Higher reliability

Maintains precise balance even at low volumes.

4. Individual input memory settings

Each Input Channel can independently remember:

▸ Volume Settings
▸ Gain Settings

More intuitive and smoother switching between multiple devices.

5. Compact body, highly flexible system

The A390 features a compact design, delivering high-performance driving capabilities within a limited size.

It can be flexibly matched with desktop systems, small speakers, and even large loudspeakers.It also comes with intuitive infrared remote control operation.

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Specification