ATC C1 Subwoofer

Built to provide a dynamic low-distortion bass foundation for ATC’s Entry Series speakers, its C1C and C3C centre speakers, HTS Series on-wall speakers and all but the largest satellite speaker systems, the new C1 Sub Mk 2 is a compact design, incorporating a hand-built 12” (314mm) ATC bass driver and a ATC 200W class A/B power amplifier.

Designed for both music and cinema applications and replacing the Mk1 version, the new C1 Sub promises a quality of low frequency reproduction that belies its price point. The re-engineered design incorporates ATC’s customarily transparent circuits boosted by larger power supplies, the latest ATC grounded-source 200 watt Class A/B discrete MOSFET power amplifier and improved overload protection circuitry (with front-panel indicator) for greater control at full output. The low-pass filter circuits have been comprehensively re-worked to facilitate the best possible integration with partnering speakers from ATC and other manufacturers.

Controls include a continuously variable low pass filter, a continuously variable all-pass filter and polarity switch, speaker level L/R inputs, independent L/R RCA line inputs and a summed line output RCA connector to facilitate the daisy-chaining of multiple subwoofers.

Retained by the Mk2 C1 subwoofer is the hand-built 12" ATC bass driver using a massive motor assembly and 3" ribbon voice coil. It’s precision pairing with the new C1 Sub amplifier will deliver clean and dynamic low frequencies down to 25Hz (-6dB).  ATC recommends that a single C1 Sub partners ATC speaker models up to the SCM19 and HTS11, and that two subs partner SCM40 and HTS40 (although not essential in all room sizes).