Rebec ES2S 2-Channel Class AB Amplifier

Product Overview

The Rebec ES2S is a flagship 2-channel Class AB amplifier from the Rebec Legend Series. Developed as one of the highest-positioned amplifier models in the Rebec product range, the ES2S represents the company’s approach to combining substantial output capability with detailed musical reproduction and precise signal control.

Built around a Class AB amplifier architecture, the ES2S is designed for audio systems that demand both power and refinement. Rather than focusing solely on output figures, the amplifier is engineered to preserve musical information throughout the amplification process while maintaining stability under demanding operating conditions.

With 250W RMS per channel at 4Ω, 500W RMS per channel at 2Ω, and bridge capability up to 750W, the ES2S offers the power reserves required for advanced car audio systems while maintaining the sonic characteristics associated with the Legend Series.

The Legend Series Philosophy

Within the Rebec product lineup, the Legend Series occupies the highest amplifier tier. Products in this series are developed with a stronger emphasis on musical expression, detail retrieval, dynamic capability, and overall system control.

The ES2S reflects this philosophy through a dedicated two-channel configuration, substantial power output, and a sound character that prioritizes structure and organization within the musical presentation.

Rather than pursuing complexity through additional channels, the ES2S focuses on maximizing the performance of a dedicated two-channel amplifier platform. This approach allows the amplifier to concentrate its available resources on power delivery, signal stability, and musical reproduction.

Key Features

• Legend Series flagship amplifier

• Class AB amplifier design

• 250W × 2 RMS @ 4Ω

• 500W × 2 RMS @ 2Ω

• 750W × 1 bridged output

• Frequency response from 20Hz to 35kHz

• Signal-to-noise ratio ≥99dB

• THD+N ≤0.01% (1kHz)

• Power transistor output stage

• High-current power design

• Bridgeable architecture for system flexibility

Design and Engineering

The ES2S utilizes a Class AB amplifier circuit combined with a power transistor output stage. This amplifier topology has long been valued in car audio applications for its ability to balance power delivery with musical reproduction.

Operating from 10V to 16V, the amplifier accepts low-level input signals ranging from 0.63V to 11V, providing compatibility with a wide variety of source units, DSP processors, and audio system configurations.

The amplifier delivers a frequency response of 20Hz to 35kHz, allowing it to reproduce signals well beyond the primary audible range while maintaining consistency throughout the audio spectrum.

A signal-to-noise ratio of at least 99dB helps preserve low-level musical information, while THD+N below 0.01% contributes to accurate signal reproduction and low distortion performance.

The physical construction of the ES2S reflects its position within the Legend Series. Measuring 421 × 240 × 63mm and utilizing a 25A × 3 fuse configuration, the amplifier is designed to support its higher output capability and operational stability.

Power Delivery and Control

One of the defining characteristics of the ES2S is its combination of output capability and control.

At 4Ω, the amplifier delivers 250W RMS per channel. When operating at 2Ω, output increases to 500W RMS per channel, providing additional headroom for systems requiring greater drive capability.

For applications requiring higher single-channel output, the ES2S can be bridged to produce 750W. This flexibility allows the amplifier to be integrated into a variety of system architectures while maintaining the sonic character of the Legend Series.

The focus is not simply on producing higher output levels, but on maintaining consistency and control as output demands increase.

Sound Performance

The ES2S is characterized by a presentation that is majestic and vigorous while remaining organized and controlled.

Its sound signature emphasizes progression and structure within the music. Individual elements of a recording are reproduced with clarity and remain distinct from one another, allowing musical information to be presented in an orderly manner.

The amplifier is designed to reveal detail without creating an exaggerated or analytical presentation. Low-level information remains audible, while larger dynamic passages retain their impact and authority.

This balance contributes to a listening experience where musical detail, dynamic expression, and overall coherence are preserved simultaneously.

The ES2S also demonstrates a strong sense of control during complex musical passages. Rather than allowing dense arrangements to become congested, the amplifier maintains separation and organization across the soundstage.

As a result, the listener is able to follow individual musical elements while still appreciating the performance as a whole.

Product Positioning

Within the Rebec amplifier range, the ES2S serves as one of the brand’s flagship amplifier models and a core member of the Legend Series.

Compared with the RE Series and A Series amplifiers, the ES2S occupies a higher performance position, offering increased output capability, a larger power platform, and a sound presentation focused on detail, dynamics, and structure.

The amplifier is intended for systems where amplifier performance is expected to play a central role in the overall listening experience.

Its bridgeable architecture further extends its versatility, allowing it to be used in a range of advanced system configurations.

Design Philosophy

The ES2S was developed around a straightforward objective: to reproduce music with authority, detail, and control while maintaining the natural character of the recording.

By combining a high-power Class AB architecture with low distortion performance and a structured sonic presentation, the amplifier seeks to preserve both the energy and the information contained within the music.

This philosophy defines the role of the ES2S within the Rebec lineup and explains its position as a flagship model in the Legend Series.

Rebec ES2S

Legend Series Flagship. Powerful Dynamics. Organized Musical Detail.