Class AB sound quality doesn't have to be expensive and the ST series amps are a proof of that. Ready for both old-school passive systems and active setups as well, these provide reliable AB power for daily builds. Manufacturer provided specs: Output power RMS @ 4 Ohm, 14.4V: 90W x 4 Output power RMS @ 2 Ohm, 14.4V: 130W x 4 Output power RMS @ 4 Ohm bridged, 14.4V: 260W x 2 Damping factor >100 Frequency response: 5-38000 Hz THD: 88dB Input: 4x RCA, 4x high level Input sensitivity: 500mV-9V Power on options: 12V remote / high level auto detection Low pass filter options: 50Hz-4000Hz (independend between channels 1-2 and 3-4) High pass filter options: 15Hz-400Hz (independend between channels 1-2 and 3-4) Bass boost dial: 0-12dB @ 45Hz (on channels 3-4) Internally fused with 2x35A fuses Dimensions: 360x230x52 mm What's included: 1x Amplifier 2x high level input harness 2x spare 35A fuses 2x Hex keys for power and terminal tightening 4x Amplifier mounting screws 1x Instructions