AudioControl's ACX-300.4 all-weather amplifier delivers honest power levels to the sound system in your boat, utv, motorcycle, and more. for a two or four channel system, the ACX-300.4 will ensure your open-air speakers deliver plenty of punch and clarity, all day long. Installer-friendly, heavy gauge quick-connect wiring makes installation quick and painless, making the ACX-300.4 all-weather amplifier the perfect solution for your next adventure. * 4 x 75 watts @ 2 ohms * 4 x 50 watts @ 4 ohms * 150 watts @ 4 ohms bridged * IPX6 Rated * GTOTM Signal Sense * High and low input modes: 4 and 2 channel input modes * Linkwitz-Riley Crossover * Bulletproof 5 year warranty (when installed by an authorized AudioControl dealer) * inputs * Preamp/Speaker Level Inputs: 4 * Input Voltage Low: 500 mV - 6 Vrms * Input Voltage Range High: 1 Vrms - 12 Vrms outputs * Rated Continuous (RMS) Power at 14.4V: * 4 Ohms - 50 W x 4 RMS * 2 Ohms - 75 W x 4 RMS * Bridged 4 -Ohms - 150 W RMS * Frequency Response: 26 Hz - 22 kHz * Signal to Noise: 106 dBA, Ref 50 W @ 4 Ohm * THD+N: