Bowers & Wilkins SA250 MK2 Rack-Mount Amplifier

250W Class-D Power Output for Strong and Clean Performance

Rack-mount amplifier with built-in subwoofer EQ perfect for use with ISW-4 and ISW-3 subs. Delivering a robust 250 watts of efficient Class-D amplification, this unit ensures powerful and controlled bass performance. The high-efficiency design minimizes heat while maintaining clean output, allowing the subwoofer to perform with authority even during demanding movie scenes or dynamic music passages.

Built-In Subwoofer Equalization Optimized for B&W In-Wall Subs

The amplifier features integrated equalization specifically engineered to complement Bowers & Wilkins in-wall subwoofers. This tailored tuning enhances low-frequency accuracy, ensuring tight, balanced bass that integrates seamlessly with the main speaker system.

EQ Selection Switch (ISW-3 / ISW-4 Compatibility)

A dedicated switch allows users to select the appropriate equalization profile based on the connected subwoofer model, whether ISW-3 or ISW-4. This ensures optimized performance and accurate bass response tailored to each specific subwoofer design.

Adjustable Low-Pass Filter with Bypass Option

The adjustable low-pass filter provides precise control over crossover settings, enabling smooth integration with your main speakers. For systems that utilize an external AV receiver’s bass management, the bypass option allows for direct signal routing without additional filtering.

Phase Control (0° / 180° Settings)

With selectable 0° or 180° phase settings, the amplifier allows proper alignment of the subwoofer with the rest of the system. Correct phase adjustment improves bass coherence and impact, especially in complex room environments.

Movie/Music Mode Switch

A dedicated Movie/Music mode switch adapts the bass profile to suit different listening preferences. Movie mode enhances impact and cinematic depth, while Music mode delivers tighter, more controlled bass for accurate and enjoyable music reproduction.

Technical Specifications