The MITUS 121SA is 21" large vented bass reflex subwoofer is the perfect low-frequency extension for the MITUS range and the ideal companion for the FBT MITUS 206LAline array for ground stack applications with optional metal base. The MITUS 121SA shall meet the following performance criteria, frequency response of 29Hz to 100Hz, maximum SPL of 137dB peak, class D amplifier 1200W RMS. The MITUS 121SA provides a DSP with 8 presets-cardioid and infra configurations. The FBT MITUS 121SA feature 0.70" Baltic birch plywood construction covered in a scratch resistant black paint with M20 top-mounted stand adapter and six FBT design aluminum handles. The control panel provides XLR in &link, volume control, preset, delay, phase 0°-180° and GND lift.