Rebec A1800D Mono Class D Subwoofer Amplifier

Product Overview

The Rebec A1800D is a high-power mono Class D amplifier developed specifically for passive subwoofer applications. As the most powerful model in the Rebec A Series mono amplifier lineup, the A1800D is designed for systems that require substantial low-frequency output and increased power reserves.

Delivering up to 1800W RMS at 1Ω, the amplifier provides the capability needed for larger subwoofer systems while maintaining the efficiency advantages of a Class D platform. The A1800D combines high output power with dedicated bass tuning controls, allowing it to support a wide range of low-frequency system configurations.

Positioned above the A1200D, the A1800D is intended for users seeking greater output capability and support for more demanding subwoofer applications.

Key Features

• Mono Class D amplifier design

• 700W × 1 RMS @ 4Ω

• 1100W × 1 RMS @ 2Ω

• 1800W × 1 RMS @ 1Ω

• Frequency response from 10Hz to 150Hz

• Signal-to-noise ratio >95dB

• THD+N ≤0.05% (100Hz)

• Adjustable Subsonic Filter (10Hz–50Hz)

• Adjustable Low Pass Filter (50Hz–250Hz)

• Variable Bass Boost (0–12dB)

• Dedicated high-power subwoofer amplifier platform

Design and Engineering

The A1800D utilizes a Class D amplifier architecture with a power transistor output stage. This design allows the amplifier to deliver high output capability while maintaining efficient operation and manageable installation requirements.

Operating from 10V to 16V, the amplifier accepts low-level input signals from 0.3V to 6V, allowing compatibility with a wide variety of source units, DSP processors, and audio systems.

To support different subwoofer configurations, the A1800D includes an adjustable subsonic filter, adjustable low-pass filter, and variable bass boost control. These features allow the amplifier to be configured according to the characteristics of the subwoofer and enclosure being used.

Compared with lower-power mono amplifiers, the A1800D utilizes a larger chassis and increased current capacity to support its higher output platform.

Power Delivery

Power capability is one of the defining characteristics of the A1800D.

The amplifier delivers 700W RMS at 4Ω and 1100W RMS at 2Ω. At 1Ω, output reaches 1800W RMS, providing substantial power reserves for larger subwoofer systems and applications requiring higher amplifier output.

This increased power capability allows the amplifier to support a broader range of subwoofer sizes and system requirements while maintaining stable operation across different load conditions.

Compared with the A1200D, the A1800D provides significantly higher output power and is designed for applications that demand greater low-frequency authority.

Sound Performance

The A1800D is designed as a high-power single-channel bass amplifier with a low-frequency presentation that combines strong energy with a loose and elastic tonal character.

Its substantial power reserves allow the amplifier to support deep bass reproduction while maintaining the dynamic qualities of the music. Low-frequency passages are reproduced with weight and presence, while changes in bass intensity remain clear and controlled.

The amplifier is designed to extend low-frequency performance while preserving the sense of movement and flexibility that characterizes its bass presentation.

With dedicated low-frequency controls and increased output capability, the A1800D is able to support both everyday listening systems and larger subwoofer installations requiring greater bass output.

Product Positioning

Within the Rebec amplifier lineup, the A1800D occupies the highest position among the A Series mono subwoofer amplifiers.

Compared with the A1200D, it offers greater output capability and is intended for larger subwoofer systems. The amplifier extends the performance range of the A Series while maintaining the same focus on dedicated low-frequency amplification and system tuning flexibility.

For applications requiring additional power and support for larger subwoofer configurations, the A1800D represents the most capable mono amplifier in the series.

Design Philosophy

The A1800D was developed to provide high-output low-frequency amplification while maintaining flexibility and control.

By combining a dedicated Class D architecture, adjustable bass management tools, and substantial power reserves, the amplifier is designed to support demanding subwoofer systems and deliver consistent low-frequency performance across a wide range of listening conditions.

Rebec A1800D

1800W RMS Power. High-Capacity Bass Amplification. Built for Larger Subwoofer Systems.