Selling an Audiotec-Fischer USB HD module for the MATCH 7UP-BMW amp for $100. This module allows you to send digital music directly to the Audiotec-Fischer 7UP-BMW amp.
Basically, you run a 15 foot ling (10 foot long is a bit too short) USB cable from the console to the amp. Your digital music player sends the digital audio stream via this cable to the USB HD module in the amp. The amp applies digital sound processing (DSP) to the digital audio and then runs the results through the amp's digital to analog converters which are far superior to those in the factory head unit. The sound improvement is phenomenal. The music is clear, deep and rich.
If your digital audio player has a lightning (Apple) connector, you'll need the Apple Digital AV Adapter. This adapter has a USB-A female connector and a lightning port that (only) charges the Apple device. It has a male lightning connector that plugs into your iPhone or iPod.
https://www.apple.com/shop/product/M...tal-av-adapter The price is $49, but I'll sell you mine for $30 when you buy the USB module.
Module:
https://www.audiotec-fischer.de/en/m...p-7bmw/up-7dsp
Specs:
https://www.audiotec-fischer.de/medi...-INTERFACE.pdf