R300-4 Class A/B 4-Channel Amplifier 4 x 50/75 Watts/RMS @ 4/2 Ohms 2 x 150 Watts/RMS @ 4 Ohms bridged Dimensions: 196 x 61 x 434 mm 2/4-CHANNEL AMPLIFIERS • High-Pass 80Hz @ 12dB/oct • Low-Pass 50Hz-250Hz @ 12dB/oct • Bass EQ 0dB to +12dB @ 45Hz (R150-2) • Bass EQ 0dB/+6dB/+12dB @ 45Hz (R300-4) • 2/4 channel switch (R300-4) • Frequency Response 20Hz-20kHz +/-1dB • MOSFET power supply, RCA pass-thru