E65/e66 L7 amps aren't a matter of if they will fail, but when. If you have thoughts or a solution to bypass the sardine can digital junk, bring it on!
Alternatively, I have 2 cores on the shelf and would be glad to send them for testing in search of a solution.
The biggest problem experienced with failed L7 cans on e65/e66 is noise out of the subs and the driven speakers, generally no music. I presume the signal is digital to the amp so direct input into an aftermarket amp is not an option. Maybe using a DSP amp from e39/e38 to get the signal into analog would be the ticket. Those are cheap and plentiful.
No, I'm not hosting a car club meet. I really like BMWs and have virtually zero self-restraint.