- mono subwoofer amplifier - 150 watts RMS x 1 at 4 ohms - 250 watts RMS x 1 at 2 ohms - Class AB amp technology - variable low-pass filter (30-250 Hz, 12 dB/octave) - selectable bass boost (0, 6, 12 dB at 45 Hz) - variable subsonic filter (15-50 Hz, 12 dB/octave) Memphis Audio's Street Reference SRX250.1 amplifier can send up to 250 watts RMS to your sub without breaking the bank. In order to produce great bass tone, this mono subwoofer amp features a low-pass crossover, selectable bass boost, and a variable subsonic filter that give you the control you need for superior low-end punch. Remote control and more The package includes a wired remote, so you can control the bass level from the front seat. Bright LED accent lighting lends a touch of style to your installation.