Afternoon, I turned on my amp last night and when i played through it it sounded like i'd blown a speaker - crackly and distorted. This was strange as i'd been playing it quietly the night before and it had sounded fine. But when I ran the head to a speaker that was definitely not blown, the same thing happened. I put a new battery in my bass to no avail, then suddenly it just stopped making distressing noises and has been pretty much fine since. Was wondering if anyone has had a similar experience or could shed any light before i go ask at the shop/contact Hartke (i hear their customer service isn't so hot.) The amp was bought new no more than six months ago. cheers!