Fixed] Realtek HD Audio Issues | Realtek Audio Troubleshooting
EDGE 10" EDB10A Active Subwoofer | Halfords UK
Amazon.com: Lanzar 12in Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Stamped Steel Basket, 4 Ohm Impedance, 1000 Watt Power and Rubber Suspension for Vehicle Audio Stereo Sound System - MAX12 : Electronics
SOLVED: Subwoofer bad power suppply or amp? - Subwoofer - iFixit