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Nyxeris is right on the money as always, the Harmon Kardon amp is digital, so uses fibre optic. Would have to do a decent chunk of work to get it to function as the factory, but anything is possible!

I have one of the Focal 4.320 amps new in the box. I’m tempted to go for the Audiotec-Fischer MATCH UP 7BMW amp, so I would be happy to sell the 4.320. If you can be tempted by the Focal, let me know. 😁
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