ATC SCS120 Pro Sub

£5490

Overview

The ATC SCS120 Pro is a 15”/375mm active subwoofer, designed to deliver the exceptional levels of performance required by audio and music professionals and support ATCs range of active monitors. The subwoofers high dynamic range makes it ideally suited to critical monitoring in larger rooms and when paired with larger mid-field and main-monitors and across a very wide range of applications and audio formats including stereo and multi-channel surround plus immersive audio formats such as Dolby Atmos.

Building on the success of the 12” SCS70 Pro, it features a new hand-built 15”/375mm sub-bass driver, developed and manufactured by ATC at their facility in Gloucestershire, England. All driver components and parameters – from the drive system to the suspension – have been precisely optimised using the latest analysis tools available, at both small and large signal level. The result is an advanced transducer that combines a powerful short-coil motor system featuring optimised airflow and cooling, with a carbon-paper composite cone, resulting in deep, clean bass from 120Hz down to below 20Hz — with minimal distortion and maximum impact.

The SCS120 Pro subwoofer delivers an extended low-frequency response without complex electronic equalisation or processing, instead employing the more elegant combination of exceptional transducer engineering and a marginally larger cabinet volume.  Such simplicity 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, combining an extending low-frequency response with outstanding clarity in the upper bass.

The new subwoofer is powered by a 300W class AB amplifier, hand-built and optimised for fast, dynamic response. Versatile connectivity & control includes balanced stereo inputs, balanced (full-range) outputs, and analogue 4th order Linkwitz-Riley filters with multiple crossover options — including an industry-standard 80Hz setting and bypass setting for external processing. A polarity switch, variable phase control, and stepped attenuator allow precise system tuning.  For added convenience, the amp features mute control via footswitch, with daisy-chain capability for linking multiple subs.

This new subwoofer is the perfect match to the ATC SCM100/110/150A Pro studio monitors and scale effortlessly to larger systems featuring the SCM200/300A Pro main monitors. Multiple subs can be employed to elevate performance and to fill larger rooms.

Surround and Immersive Audio formats such as Dolby Atmos can be demanding of subwoofers, and these two new designs both offer significant performance gains over the smaller ATC SCS70 and the outgoing SCM0.1/15.

Thanks to employing advanced transducer and amplifier technology, the new SCS120 Pro sub offer increased dynamic range and low frequency extension, strengthening the upper range of ATC’s Professional Product line.  They offer improved subwoofer solutions to users of mid-to-large format monitors and/or to those working in larger control rooms.  The increased dynamic range on offer is particularly useful in in immersive audio and post-production applications where low frequency effects (LFE) content places large demands on subwoofers.

ATC SCS120 Pro Sub Features:

• ATC hand-built high-excursion 15”/375 mm SS75-375SC subwoofer driver
• exceptional balance of high SPL capability, low cut‑off and low distortion
• ATC discrete MOSFET class AB power amplifier
• 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
• * footswitch supplied separately, latching type, 1/4” / 6.35 mm jack connection

ATC 15-inch SS75-375SC sub-bass driver

ACOUSTIC SPECIFICATIONS

Drive Unit - Bass: 1 x SS75-375SC 8Ω

Low Frequency Cut-off: 20Hz (-6dB, half space, low pass filter @ 80Hz)

Low Pass Filters: 50Hz, 65Hz, 80Hz, 320Hz. (-6dB, 4th order Linkwitz Riley)

MaxSPL: 113dB continuous, 119dB Peak (IEC Weighted Pink Noise, measured at 1m, half space, low pass filter set at 80Hz)

Sensitivity: 85dBC, ref. -17dBu (single channel driven, Gain +6dB, Level 0dB, pink noise, low pass filter set at 80Hz

ELECTRONIC SPECIFICATIONS

Balanced Input: 2 x Rear Panel Mounted Female XLR, pin 2 hot.

Input Impedance: Approx. 20kΩ (differential).

Input CMRR: 90dB at 200Hz.

Input Sensitivity: 1.12Vrms for full power (single channel driven, Gain 0dB, Level 0dB).

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.

Low Pass Filters: 4th Order Linkwitz Riley.

Output Impedance: Approx. 100Ω (dif ferential).

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.

Frequency Response: <2Hz (-3dB) - 320Hz (-6dB, set by panel -controlled LP filter).

Limiter: ATC Active FET Momentary Gain Reduction, active limiter indicated on front panel.

Electronic Amp Protection: Amplifier D.C Of fset and over-temperature (both indicated on rear panel)

Power Consumption: Idle 16W/60VA, 1/8th Power 170W/230VA, Full Power 500W/600VA.

Mains Input: 220-230V, 115V - Factory set. Please observe panel markings and labels.

Heat Output: Idle 47.8 BTU/hr, 1/8th Power 458.9 BTU/hr, Full Power 682.4 BTU/hr.

Additional: Mute via 1/4”/ 6 .35mm Jack socket, controlled via latching footswitch.

PHYSICAL SPECIFICATIONS

Net Weight: 44.5kg

Cabinet Dimensions (H x W x D): 638 x 498 x 568mm (heatsink protrudes a fur ther 40mm from rear). See data sheet for a detailed drawing