Review on 🎧 QOFOWIN Wireless Bluetooth Audio Receiver Adapter, Car & Home Stereo Music Kit for Speakers (with Aux Input) (Yet-M1) by Pavan Cormier

So I got it yesterday and have been testing it all day. I drive a VW Jetta 07 with stock head unit and speakers and aftermarket AUX input with ground fault isolator. Inline. This product works. Automatic connection with low gain, plug and play, ready to use. However, I have noticed that some audio quality is lost when Bluetooth is connected. Especially low frequencies. For testing, I tried the Steve Aoki song and the Skrillex song. Both sounded good with this product but I wanted more in the bass sections. When I used an extra cable, I encountered quieter sounds. I tried using some hip hop songs as well as heavy metal, blues and punk. The biggest difference was mostly the bass. So I think if you play bass this product may not be for you.