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Xtrons Ak/inib/nrcbl Iso Cable 40pin Iso Harness Adapter With High To Low Impedance Converter - Diagnostic Tools - AliExpress
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No sound from rear speaker after installing aftermarket with this head | Audi-Sport.net
Rear Speakers/Amp not working after new HU - AudiForums.com
No sound in rear speaker for aftermarket radio in Audi a3 - AudiForums.com
Audi A3 - rear speakers not working with 'AUX-OUT' from Apline HU - AudiWorld Forums