it's the 6500.2 set up with no extra mids. the amp was an addition to run a 10" sub & 4 polk db651's; one ch per speaker. the amp ran fine last year & this yr until i installed the 6500.2.
it is mounted to carpet on wall under the spotter seat.
the wire is 4 ga.
the internal crossover on the speakers is set to 0db.
the gain on the amps are just past the mid way mark; sorry i'm on iphone updated post & not at home to look. i can look this eveing.
let me know if i need to look at anything else.
Gain is a bit too high for my liking. Back them down to the 11 oclock position (not quite half way) if the problem still is present.