I knew I spoke too soon. Made a call last night and the CK3000 locked up when the person answered with the mute line active.

Nothing seems to be able to unlock it, including removing the key from the car. I can only hope the battery isn't drained today. Sort of glad I never added the extra wiring and relay to power the amp if the mute line is asserted.

Grumble.

Notably, that means no music in the car at all right now. Gotta go dig through the dash and see if a hard reboot of the unit fixes it, otherwise, a speakerphonedectomy is in order.

Luckily, I wired in harnesses that makes that somewhat less annoying.

-brendan