DB Drive A775.4 Okur A7 Series 4-Channel Class AB Amplifier: * 2-ohm stereo capability * Continuously variable low level RCA inputs * Large gauge power input terminals * DRIVESINK heat management system * 18 dB per octave high pass and low pass crossover network * Continuously variable bass boost at 45Hz * Internal multi-link module for easy multi-linking of 2 like amps * Unregulated DC-DC PWM power supply * Speaker short circuit protection * RCA pre-amp outputs for easy daisy chaining of multiple amps * 500W max * 125W x 4 at 2 ohms * 75W x 4 or 250W x 2 at 4 ohms