Equivalent air volume (Vas): 9

HiFonics offers different quality levels depending on the strength of the system or requirements: With the HiFonics ZEUS 100dB and ZEUS 120dB AluButyl insulation material

This amplifier is extremely efficient thanks to its class D technology

The SounDigital 400

PM1000X1bd Packaging unit:Single Equivalent air volume (Vas): 9Rockford Fosgate Punch Marine Amplifier With its highly efficient Class BD circuit topology, the PM1000X1bd provides maximum BOOM for your money! Due to its special low frequency response, this amplifier is optimized for mid bass speakers or subwoofers only. No need to worry though, its 1 ohm capability will easily drive a pair of 4 ohm DVC subwoofers or a quad configuration of 2 ohm DVC subwoofers. Features 12 dB octave Butterworth crossover RCA pass