ToneWinner 600W home theatre subwoofer 12 inch woofer technics wooden speaker super bass AV concert powered soundbar subwoofers - AliExpress
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
Technics SB-AS40 Powered Subwoofer Photo #1681314 - US Audio Mart