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ATC LOUDSPEAKERS

SCS120 Pro

Subwoofers

15" sealed subwoofer, 300W Class A/B amp, 20Hz low cut-off, 113dB SPL, XLR I/O, adjustable gain, phase, polarity, low pass filters to 320Hz.

$9,785.00 CAD
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Description

The ATC SCS120 Pro is a 15" active subwoofer built for precise low-frequency performance in professional audio environments. It features a sealed-box design and a proprietary 375mm driver, offering accurate and controlled bass response. Designed to pair seamlessly with ATC’s range of professional monitors such as the SCM45A through SCM300A, the SCS120 Pro supports stereo, surround, and immersive audio setups.

Equipped with a 300W convection-cooled Class A/B amplifier, it delivers reliable performance with low distortion. The subwoofer provides dual balanced XLR inputs and outputs, along with adjustable gain, phase, polarity, and selectable low-pass filters to tailor the response to the room and system configuration. A remote mute function is available via a latching footswitch connection. An in-wall version with a remote amplifier, the SCS120iW Pro, is also offered for installation-specific needs. The SCS120 Pro combines power, precision, and flexibility for studios that require dependable and clear low-end monitoring.

Features

Powerful Subwoofer Design
Delivers deep, accurate bass using a high-performance 15” ATC custom driver.

Versatile Audio Compatibility
Pairs perfectly with ATC’s professional monitor range and works well in stereo, surround, or immersive setups.

Built-In High-Power Amplifier
Features an integrated 300W Class A/B amplifier for strong and reliable output.

Flexible Connection Options
Includes two balanced XLR inputs and two unfiltered XLR outputs for easy integration.

Customizable Sound Controls
Adjust gain, low-pass filter, polarity, and phase to match your room and system.

Remote Mute Function
Supports a footswitch (sold separately) to mute the subwoofer from a distance.

Alternative In-Wall Version
Also available in an in-wall model (SCS120iW Pro) with a remote amplifier.

Durable and Professional Build
Designed for studio use with a sealed box construction for accurate low-end response.

Heat-Efficient Cooling
Uses convection cooling for silent operation without fans.

Protective Features
Built-in limiter and amplifier protection ensure safe, distortion-free performance.

Specifications

General Specifications
Device Type: Professional Active Subwoofer
Design: Sealed Box
Driver: 15" / 375mm ATC SS75-375SC, 8Ω
Amplifier Type: Discrete MOSFET Class A/B, Grounded Source
Amplifier Cooling: Convection Cooled
Amplifier Power Output: 300W into 8Ω
Application: Stereo, Surround, Immersive Audio
Compatibility: SCM45A, SCM50A, SCM100A, SCM110A, SCM150A, SCM200A, SCM300A Pro Monitors
Remote Control: Mute via ¼” (6.35mm) jack, latching footswitch (not included)
Variant: In-wall model with remote amplifier (SCS120iW Pro)
Construction: ATC Proprietary Driver and Amplification
Form Factor: Floor-standing Subwoofer
Weight: 44.5kg / 98.1lbs
Dimensions (H x W x D): 498mm x 630mm x 568mm (excluding projections)

Acoustic Specifications
Drive Unit: 1 x ATC SS75-375SC, 8Ω
Low Frequency Cut-off: 20Hz (-6dB, half space, LPF at 80Hz)
Low Pass Filters: 50Hz, 65Hz, 80Hz, 320Hz (-6dB, 4th order Linkwitz-Riley)
Max SPL: 113dB continuous, 119dB peak (IEC weighted pink noise @ 1m, half space, LPF at 80Hz)
Sensitivity: 85dBC, ref. -17dBu (Gain +6dB, Level 0dB, LPF at 80Hz)

Input/Output
Inputs: 2 x Balanced XLR (female, pin 2 hot)
Outputs: 2 x Balanced XLR (unfiltered/processed)
Input Impedance: ~20kΩ (differential)
Output Impedance: ~100Ω (differential)
Input Sensitivity: 1.12Vrms for full power (Gain 0dB, Level 0dB)
Input CMRR: 90dB at 200Hz

Controls
Gain Control: 0, +6dB, +10dB
Level Control: 0dB to -11dB in 1dB steps (total range 21dB with gain switch)
Polarity Control: In-phase / Out-of-phase
Phase Control: 0–180°
Low Pass Filters: 4th Order Linkwitz-Riley
Limiter: ATC Active FET Momentary Gain Reduction (indicated on front panel)

Performance
Frequency Response: <2Hz (-3dB) to 320Hz (-6dB, LPF dependent)
THD+N: <0.003% / -90dB @ 100Hz, 300W into 8Ω, 90kHz BW

Power
Power Consumption (Idle): 16W / 60VA
Power Consumption (1/8 Power): 170W / 230VA
Power Consumption (Full Power): 500W / 600VA
Mains Input: 220–230V / 115V (factory set)
Heat Output (Idle): 47.8 BTU/hr
Heat Output (1/8 Power): 458.9 BTU/hr
Heat Output (Full Power): 682.4 BTU/hr

Protection
Amplifier Protection: D.C. Offset and Over-temperature (indicated on rear panel)

Optional Accessories
Remote Mute Footswitch: Latching type, ¼” / 6.35mm jack connection.

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