Car Home Amplifier Subwoofer Equalizer Crossover RCA Adjust Line Level Volume : Amazon.ca: Electronics
2*50w+100w Power Subwoofer Bluetooth Amplifier Board Sound Class D Home Theater Audio Stereo Equalizer Aux Amp | Fruugo PT
High Low Level Impedance Adaptor - Car Audio System RCA Line Output Converter Adapter w/ Adjustable Level Control - Works on Vehicle Amplifier, Equalizer, Home Theater Setup - Legacy LN60 | Walmart Canada