
Stroud, Gloucestershire, UK: ATC is proud to unveil two new flagship 15″/375mm active subwoofers — the SCS120 Pro and SCS120iW Pro — designed to elevate professional monitoring systems to new levels.

Engineered to support ATC’s larger mid-field and main monitors, these subs deliver exceptional low-frequency extension, expanded dynamic range, and seamless integration for stereo, surround, and immersive formats including Dolby Atmos. The SCS120 Pro has been designed for use free-standing, and the SCS120iW Pro includes features ideal for flush/in-wall mounting.
Building on the success of the 12” SCS70 Pro, but both models feature 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 subwoofers deliver 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.

Both new subwoofers are 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.
The SCS120iW Pro (In-Wall) variant offers all the above-mentioned performance but is optimised for flush in-wall mounting, featuring a shallower cabinet, and recessed rear input connector panel, maximising floor space. The accompanying R1-300 Pro remote-mounted 7U/19” amplifier offers the user the flexibility to install the amplifier in a suitable wall close to the subwoofer, in a control room rack, or in a machine room, with connections made via NL4 speaker and 5-pin XLR cables.

These two new subwoofers are 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 and SCS120iW Pro subs 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.
The SCS120 Pro and SCS120iW Pro are available now.
The recommended UK retail price for the SCS120 Pro is: £4575+ VAT.
The recommended UK retail price for the SCS120iW Pro is: £5408 + VAT (inc. R1-300 Pro remote amp, excluding cables).
Contact your local ATC dealer or distributor to arrange a demonstration.
For a list of authorised international ATC distributors and dealers, and for pricing in your country/region, please see Where To Buy
For further information on the SCS120 Pro & SCS120iW Pro, please visit the Product Webpage.