2.1Channel Car Audio Stereo Amplifier 12V 400 Watt Speaker HIFI Power Subwoofer 600609714515 | eBay
REL 3 Wire Sub Speaker Cable. Neutrik Speakon. Subwoofer Lead | eBay
New Mini Audio Cable Adapter Audio Converter 6 Pin Iso Aux Line Out 4 Chinch Kabel 4 Rca Plug For Vw Seat For Skoda For Audi - Cables, Adapters & Sockets - AliExpress
Hifi RCA to 2RCA Cable Hi-End Copper and Silver One Sub-2 Splitter Y Audio Cable | eBay