Taramps CRX4 Compact Car Audio Crossover Processor with Bass Boost

BASS BOOST Variable Central Frequency: 20 ~65Hz (Fixed Gain 6dB). MAXIMUM INPUT LEVEL 8V RMS. LOW WAY (MONO) Frequency cut / Variable (LPF): 40Hz ~275Hz (-12dB/8th). LOW MID WAY (MONO) Minimum frequency of HPF cut / Variable: 25Hz ~ 140Hz (-12dB/8th).

eBay