The ATC C6 Sub is a high-performance active subwoofer that delivers deep, tight, and accurate bass for stereo and home cinema systems. It extends low frequencies while keeping ATC’s focus on speed, control, and musical detail.
In addition, the C6 Sub gives you flexible control settings for easy system matching. Therefore, you can tune it to different rooms and speaker setups while keeping clean and natural bass performance.
High-performance bass driver
The C6 Sub uses a full “SL” specification 15˝ (375mm) bass driver. In addition, ATC designs it for high control and low distortion. As a result, it produces deep bass with strong accuracy and fast response.
Built-in amplification
The subwoofer uses a 450W Class G amplifier. Furthermore, this design gives strong power delivery and tight control over low frequencies. Therefore, the C6 Sub keeps bass clean even at high volume levels.
Flexible tuning and system matching
The C6 Sub offers variable gain, phase control, and adjustable crossover frequency. In addition, it includes stereo inputs for easy connection. As a result, you can match it precisely to different systems and rooms.
System integration and performance
The C6 Sub works as an extension for ATC full-range speakers. Therefore, it adds deep bass without changing the tonal balance. In addition, it keeps timing and clarity consistent across the system.
Build and reliability
The C6 Sub is hand built in the UK and designed for long-term use. In addition, ATC supports it with a 6-year warranty.
Main Features
- High-performance active subwoofer
- 15˝ (375mm) “SL” specification bass driver
- 450W Class G built-in amplifier
- Variable gain control
- Adjustable phase control
- Variable crossover frequency
- Stereo inputs for flexible setup
- Deep, controlled bass with high accuracy
- Custom veneer finishes available (Yew featured)
- 6-year manufacturer warranty





