Review on Kicker CWCD104 CompC Subwoofer Voice by Matt Woodward

This is a fantastic outdoor subwoofer. I mounted it on the back of my 2018 Audi S4 to replace the included B&O subwoofer. The subwoofer fitted perfectly with a 3/4" spacer ring underneath. The bass comes out very deep and clean. The frequency response is very flat from 28Hz to 80Hz with 27Hz at -3dB and 25Hz at -10dB. I use a factory amp, but if you want the system to hum, consider adding an amplifier. I did the T/S calculations prior to purchase and the actual measurement specs match the calculations exactly. This is not considered "shallow" depth viewed, but it's flat - just enough not to take up too much trunk space.