SCM300ASL

About the SCM300ASL

The ATC SCM300ASL is a professional active three-way studio monitor designed for high-fidelity sound reproduction with extended bass and high maximum volume. It features proprietary ATC drivers including a 1.25-inch (34mm) soft dome tweeter, a 3-inch (75mm) Super Dome midrange driver, and twin full-spec 'SL' 15-inch (375mm) bass drivers housed in a large 300-liter enclosure. The system delivers a maximum continuous SPL of 121dB at 1 meter and covers a frequency range from 25Hz to 20kHz with ±2dB amplitude linearity. The crossover frequencies are set at 380Hz and 3.5kHz. The loudspeaker uses even order critically damped filters and includes active FET momentary gain reduction plus thermal tweeter protection for overload safety. It is powered by a rack-mount P4 grounded source amplifier delivering 275W + 275W to bass, 200W to midrange, and 100W to high frequencies. The input is via balanced XLR with 2V sensitivity and input impedance greater than 10kΩ. The cabinet dimensions are 884 x 925 x 460 mm (HxWxD) and it weighs 87 kg. The design incorporates a dual-suspension midrange dome to avoid ferrofluid use, ensuring long-term consistency. The SCM300ASL is covered by a 6-year warranty and is regarded as a flagship model for professional monitoring applications.