ATC SCS70iW Pro Active 12″ Studio Subwoofer for Soffit Mounting


SCS70iW Pro

12”/300mm in-wall professional active subwoofer


The ATC SCS70iW Pro is a 12”/300mm active subwoofer, designed to be mounted in-wall (flush mount).  It is the ideal partner to in-wall mounted mid-size ATC monitors in stereo, multi-channel, and immersive audio applications.

Key Features

  • In-Wall (flush mount) cabinet design with reduced depth and remote mounted amplifier.
  • ATC hand-built high-excursion 12”/300mm SS75-314SC subwoofer driver.
  • R1-300 7U/19” remote rack mount amplifier.
  • Amp – Sub connection via NL4 speaker & 5-pin XLR LED cable*
  • Stereo balanced inputs & stereo ‘Link’ balanced outputs.
  • Level, Low-Pass Frequency & Phase user controls.
  • Remote muting via footswitch**.
  • Hand-built in England and covered by a 6 year warranty.

*Cables supplied separately prices according to length.
**Footswitch supplied separately, latching type, ¼”/6.35mm jack connection.

Acoustic/Subwoofer Specifications

Drive Unit – Bass: 1 x SS75-314SC 8Ω.Ω
Low Frequency Cut-off: 22Hz (-6dB, half space, low pass filter set at 80Hz).
Low Pass Filters: 50Hz, 65Hz, 80Hz, 320Hz. (-6dB, 4th order Linkwitz Riley).
MaxSPL: 110dB continuous, 116dB peak (IEC Weighted Pink Noise, 1m, half space, low pass filter @ 80Hz).
Sensitivity: +4dBu ref 88dBC (single channel driven, Gain +6dB, Level 0dB, pink noise, low pass filter @ 80Hz).
Speaker Level Input: 1 x Rear Panel Mounted Neutrik NL4.
Power/Clip & Mute LEDs Input: 1 x Rear Panel Mounted 5-Pin Female XLR.

Electronic Specifications R1-300 (Remote Amp)

Amplifier type: Grounded Source MOSFET based Class A-B, convection cooled.
Output Power: 300W in to 8Ω.
THD+N: <0.003%/-90dB, at 100Hz, 300W into 8Ω over 90kHz bandwidth.
Balanced Inputs: 2 x Front Panel Mounted Female XLR, pin 2 hot.
Balanced Outputs: 2 x Front Panel Mounted Male XLR, pin 2 hot.
Frequency Response: <2Hz (-3dB) – 320Hz (-6dB, set by panel-controlled LP filter).
Low Pass Filters: 4th Order Linkwitz Riley
Gain Control: 0, +6dB, +10dB.
Level Control: 0dB -11dB in 1dB steps. Total range 21dB with use of Gain switch.
Phase Control: 0-180° ref. Input.
Polarity Control: In-phase/Out-of-phase ref. Input.
Speaker Level Output: 1 x Rear Panel Mounted Neutrik NL4.
Power/Clip & Mute LEDs Output: 1 x Rear Panel Mounted 5-Pin Female XLR.
Power Consumption: Idle 8W/14VA. 1/8th Power 170W/230VA. Full Power 500W/600VA.
Additional: Mute via ¼”/ 6.35mm front panel mounted Jack socket, controlled via latching footswitch
(supplied separately)

Physical Specifications – Subwoofer

Dimensions: (H x W x D): 568 x 464 x 450mm / 22 5/16 x 18 1/4 x 17 11/16 inches (allow a further 25mm / 1 inch at rear for cable clearance). See data sheet for a detailed drawing.
Net Weight: 44kg / 97lbs.

Physical Specifications – Amp

Dimensions (H x W): 7U x 19” (rack mount). Depth 133mm / 5 ¼ inches. Allow a further 90mm/3 ½ inches at rear for cable clearance. See data sheet for a detailed drawing.
Net Weight: 12kg / 26.4lbs

Additional information

Weight 44 kg
Dimensions 56.8 × 46.4 × 45 cm


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