American Bass VFL120.1-1 Channel 4400W AMP Class D American Bass 2200W RMS 2200W RMS, 1 OHM stable D-class Monoblock amplifier. Frequency response: 20Hz-350Hz. Variable subsonic: 10Hz-50Hz at 24dB/oct; Variable low pass filter: 35Hz~250Hz AT 24dB/oct; Variable bass boost: 0-9dB AT 45Hz. Remote gain controller; Two amplifiers linkable connector and selector. External fuses and fuse blocks.