I have a SANWU audio TDA7492P (the red one with aux input and buttons) which works perfectly through bluetooth. But when I plug in a 3.5mm jack it instantly becomes quieter. Even if I play from bluetooth and connect a cable that goes to a device that plays nothing. Generally, playing through the aux cord is quiter with any device that I've tried (always testing on 50% volume). My TV (and laptop for some reason) don't have bluetooth and if it's an easy fix, I don't want to buy an adapter.