ATC C1 Sub Mk2

AudioStereo logo
ATC C1 Sub Mk2 side view
ATC C1 Sub Mk2 side view ATC C1 Sub Mk2 front view ATC C1 Sub Mk2 lateral view ATC C1 Sub Mk2 back view


ATC launches C1 Sub Mk2 active subwoofer

Built to provide a dynamic low-distortion bass foundation for ATC’s Entry Series speakers the new C1 Sub Mk 2 is a compact real wood veneered design, incorporating a hand-built 12” (314mm) ATC bass driver and a fully discrete ATC 200W MOSFET 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 module 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.

The C1 Sub is available now in four real wood finishes: Cherry, Black Ash, Satin Black, Satin White to match Entry Series speakers. The recommended UK retail price is £1650 (inc. VAT).

Enhanced by ATC’s traditionally robust engineering and scrupulous attention to detail, the new C1 Sub Mk2 active subwoofer will generate a reliably accurate performance over a very long life, backed by ATC’s standard six year warranty.


ATC C1 Sub Mk2 Features:

  • Compact 12″ Sub suitable for both music and cinema applications
  • Ideal partner to ATC loudspeakers: SCM7, SCM11, SCM19, SCM40
  • Handmade ATC long coil 12″/ 314mm bass driver 
  • Massive optimised motor assembly
  • In-house, hand wound precision ribbon voice coil
  • ATC 200W class A/B amplifier
  • High Level and Line Level Inputs
  • Comprehensive user controls to ensure best possible integration with partnering loudspeakers
  • 6 Year warranty
ATC 314mm Bass
ATC 12″/ 314mm bass driver 


Driver:  LF 12″/ 314mm bass driver
LF Cut Off (-6dB): 25Hz–250Hz
Max SPL: 103dB
Amplifier Output: LF 200 Watts RMS
User Controls: Gain, Low Pass Frequency, Polarity, Phase
Input Connectors - Line Level: 2 x (Stereo) ViaRCA/Phono Connectors
Input Connectors - Hi-Level (Speaker): 2 x (Stereo) Pairs Via Binding Posts
Outputs: Mono Summed Line Level Via RCA/Phono Connectors
Power Requirements:  230V, 50/60Hz
Cabinet Dimensions (HxWxD): 450 x 360 x 400 mm (inc. feet and heatsink)
Weight: 26.2kg
Veneer: Cherry, Black Ash, Satin Black, Satin White

ATC C1 Sub mk2 back detail
ATC Entry full range user manual
Entry Series Manual
ATC Subwoofers:
ATC C6 Sub ATC C4 Sub mk2 ATC C1 Sub
©2008-2024 AudioStereo