This Audi adapter harness is for cars with quadlock connectors at the rear of the original head unit and with fully amplified audio systems, normally Bose branded.
The quadlock adapter has 4x phono pre-out connectors to integrate with the original amplifier in the car. This will allow audio from the new radio to work with all the speakers and original sub woofer.
The adapter harness has a loose wire for the ignition supply to the head unit, this needs to be hardwired into the vehicle.
(20-265) Audi Quadlock to ISO and phono adapter harness for fully amplified cars
£14.99Price
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