Quote:
Originally Posted by MarcoZandrini
Your car's head unit outputs only analog signals. The head unit has a crappy digital to analog converter circuitry. You might look into the Audiotech-Fischer MATCH BMW 7UP amp. I installed one in my 2018 M240i. It's very tune-able. You can also install either a Bluetooth or a USB module in the amp.
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Thanks! That's what I suspected.