Both of those amps blew out the Main Fuse's. And I don't play them that much and only at home in practice. I don't know why the fuses blew. They blew when the amps were not being played. I have never had any of my other Marshalls blow a fuse. Just these two. They only take a 4 or 5 amp main fuse. I replaced them both. The DSL is back to normal and plays fine. The TSL keeps blowing the fuses. THe TSL blew the 5 amps fuse as soon as I replaced it and powered it back on. THen I put a 10amp fuse in and it blew that one. I finally put a 20 amp fuse in it and it didn't blow. But I'm too nervous to play it with going that much over the normal amperage. I don't know why it is acting like that. Or even why they both blew the main fuses when they weren't turned on. But the DSL is okay again. Not sure why the TSL is still acting like that..