VCELINK RCA Splitter 1 Female to 2 Male (8 Inch), Stereo Audio Y Cable, Gold Plated Dual RCA Male Adapter for Car Audio, Subwoofer, TV, CD Player, Home Theater and so on, 2 Pack
Why are these pre out / main in just connected like this? And also, would you use this to hook up a powered subwoofer? Technics SA-R921 receiver. : r/BudgetAudiophile
Pre Out vs Line Out And When To Use Each One - BoomSpeaker
RCA Y Cable - RCA Mono Female to Two RCA Male - Dedicated Audio
Pre Out Vs Line Out - Find the Difference?
Pre Out Vs Line Out - Find the Difference?
Subwoofer cable
The Five Cs of Subwoofer Setup | Wirecutter
Vtopek Universal Car Radio RCA Output Wire Cable With Microphone Video Output/input Audio Subwoofer 1m/3m microphone optional|Cables, Adapters & Sockets| - AliExpress
How to Connect Subwoofer Pre-Out Cable to Speaker Wires? - BoomSpeaker