500-Watt Monoblock Class A/B Prime Series Car Amplifier Rockford Fosgate amplification at an unbelievable value. The R500-1 mono amplifier pumps out 500 watts into a 2-ohm load, perfect for a pair of R1S410 10" or R1S412 12" woofers. General Features: 12dB/octave crossover 4 Gauge power/ground connections with built-in ATC fusing MOSFET power supply RCA pass-thru 320 Watts RMS x 1 @ 4-Ohms 500 Watts RMS x 1 @ 2-Ohms Dimensions: 2.40 x 7.67 x 16.65 (in)