Sigh...
Hit a large bump on the freeway, now one channel of my MS-8 sends a loud crack through Channel 1 if I hit a bump. Parked the car, swapped Channels 1 and 2 at the MS-8 output and the crack moved sides - the static/crack could be triggered by lightly hitting down on my stealthbox.
Bypassed the MS-8 and just used the crossovers in my JL amps to run the front doors, underseats, and stealthbox. Way more output at the sacrifice of the beauty of the front stage that the MS-8 puts together.
Glad I bought that MS-8 under warranty....