The ATC SCS120 Pro is a 15-inch active subwoofer built to deliver tight, accurate low-end performance, whether you're mixing stereo, surround, or immersive audio formats. This sub is part of ATC’s renowned Pro Series and is designed to complement their larger active monitors, including models like the SCM45A through SCM300A.

Its sealed cabinet design houses ATC’s own 375mm sub driver, optimized for clarity and punch at low frequencies. Paired with a powerful 300W convection-cooled MOSFET class A/B amplifier, the SCS120 Pro delivers up to 119dB peak SPL with minimal distortion, ideal for professional studio environments where precision matters.
The unit offers a wide range of user-adjustable controls, including low-pass filter options at 50Hz, 65Hz, 80Hz, and 320Hz. Gain settings can be adjusted between 0, +6dB, and +10dB, while phase control ranges from 0° to 180°, with a polarity switch to help you achieve perfect integration with your monitoring setup.
Inputs and outputs are fully balanced via XLR connectors, and users have the flexibility of processed or unfiltered output routing depending on their system configuration. A particularly useful feature is the remote mute control, which is accessible via a latching footswitch using a standard ¼" jack, making it easy to silence the sub when needed during critical listening or adjustments.
ATC also offers an in-wall version of this model, the SCS120iW Pro, equipped with a remote amplifier. This is ideal for custom studio installations or immersive post-production rooms where space and acoustic integration are key.
Physically, the SCS120 Pro weighs 44.5kg (98.1 lbs) and comes with detailed dimensions for fitting into racks or custom spaces. Its power consumption ranges from 16W at idle to 500W at full output, and the built-in amplifier includes protection against DC offset and over-temperature, ensuring long-term reliability.
With its refined engineering, flexible integration features, and trusted ATC build quality, the SCS120 Pro is a strong addition for professionals looking to extend their monitoring system with musical and controlled low-end response.