my A1 amp about 9 months old being used to power a B2 cabinet is sounding like a zipper when I turn the power off. I started turning the A1 power off separately from the rack when I noticed it popping all by itself without having any audio a few weeks ago. I removed the other device a DBX crossover to make sure it wasn't that. You can confirm my suspicions that the amp is going bad though. Thank you.
T1 to the L1C to the DBX to the A1 to the B2 to my ears is a formula for a good acoustic box.