The Punch P500X1BD is a mono amplifier capable of 500 Watts into a 1-Ohm load. The Class-BD technology produces bass more efficiently over traditional amps, and its frequency response allows it to be optimized for subwoofers.
 

• Class bd Mono Amplifier
• 1 x 200 / 400 / 500 Watts @ 4 / 2 / 1 Ohms
• Highpass / Lowpass 35-250 Hz
• Punch EQ 0-18 dB Bass Boost (45Hz)
• Dimensions: 197 x 61 x 280 mm