34 dB maximum gain with 2 x 50 watt output. Three operating modes: stereo mono or bridged mono. Three user selectable inputs: balanced stereo (euroblock) stereo unbalanced mini jack or high level euroblock. External 12-32 V trigger. Signal detecting auto standby to con- serve energy. Dual concentric gain controls for inde- pendent channel control. 20 Hz- 20 kHz frequency response. 120 Hz high pass switch. Small size- 1.2″ x 3.9″ x 4″. Rugged aluminum housing.