The RCF HDL 20-A (HDL20-A, HDL 20A) is a self-powered 2-way line array module with two 10-inch woofers and a 3-inch voice coil compression driver, driven by a built-in 1400 W peak (700 W RMS) Class-D bi-amplifier. It reaches 135 dB max SPL, plays from 55 Hz to 20 kHz with 100° x 15° coverage, and weighs 66.6 lb (30.2 kg). It is built for