ATC SCS70 Pro 12" Active Subwoofer (In-Wall)

The ATC SCS70 Pro subwoofer delivers an extended low-frequency response without employing electronic equalisation, quite unlike many subwoofers available today. Instead, the more elegant combination of exceptional transducer engineering and a marginally larger cabinet volume is used. The simplicity of this approach reduces phase shift and group delay, aiding the integration of the sub with the partnering monitor loudspeakers. Ultimately, it delivers a more balanced and coherent experience for the listener, extending the low-frequency response without masking details or changing the tonal character in the upper bass/lower mid-range.

Drawing on 34 years of experience in amplifier design and development, ATC's electronic engineering team have delivered an all-new amplifier for these two new subwoofers. The 300W Class AB design is hand-built by ATC at their UK facility and precisely optimised to the requirements of the drive unit, resulting in fast, dynamic bass with minimal colouration. Two balanced inputs provide connectivity suited to both stereo and multi-channel/immersive audio systems plus two balanced outputs provide connections to monitor loudspeakers or to 'daisy-chain' multiple subs. Low-pass filters are analogue, 4th order Linkwitz-Riley and filter frequency options ensure optimal integration with a wide range of studio monitors. An industry-standard 80Hz low-pass and an 'off' option (for use with external processing) are also provided. A polarity switch plus a continuously variable 180° phase adjustment allows further optimisation of the subwoofer crossover and a stepped attenuator with a 21 dB range provides precise level matching.

ATC SCS70 Pro Features:

High-performance sealed box design using 12”/314mm ATC proprietary sub driver.
An ideal partner to the ATC SCM12, SCM20, SCM25A Pro, SCM45A Pro, SCM50A Pro.
Suitable for use in stereo, surround and immersive audio applications.
On-board 300W convection cooled discrete MOSFET class A/B amp.
2 x balanced XLR inputs
2 x balanced XLR outputs (un-filtered/processed).
User-adjustable gain, low pass frequency, polarity and phase settings.
Remote sub muting via latching footswitch*
In-Wall variant with remote amplifier also available – the SCS70iW Pro.

Acoustic Specifications:

Drive Unit – Bass: 1 x SS75-314SC 8Ω.
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).

Electronic specifications

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.
Input CMRR: 90dB at 200Hz.
Balanced Inputs: 2 x Rear Panel Mounted Female XLR, pin 2 hot.
Input Impedance: 20kΩ (differential).
Balanced Outputs: 2 x Rear Panel Mounted Male XLR, pin 2 hot.
Output Impedance: 100Ω (differential).
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.
Limiter: ATC Active FET Momentary Gain Reduction, active limiter indicated via front panel LED.
Sensitivity: 6dBu / 1.55Vrms for full power (single channel driven, Gain 0dB, Level 0dB)
Mains Input: 220-230V or 115V – Factory set. Please observe panel markings and labels!
Power Consumption: Idle 8W/14VA. 1/8th Power 170W/230VA. Full Power 500W/600VA.
Additional: Mute via ¼”/ 6.35mm Jack socket, controlled via latching footswitch (supplied separately

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ATC SCS70 Pro 12" Active Subwoofer (In-Wall)