My friend had a Marshall Valvestate head and it used to make a rumbling noise. He found out that a large percentage of them had a manufacturing problem. I'm pretty sure it was made in the mid nineties. Now, a coworker of mine wants to buy her kid a Valvestate 100 combo amp. I don't know how old the amp is. Are any of you guys aware of problems with these Marshall Valvestate amps?
The Valvestats where made in the mid 90's 95 or 96 , they where not made long. I have 2 100watt heads , I have had no major problems with mine. not to rattle any chains , but Joe I work on amps everyday , and I see more Solid State than tube amps , on failures , most of the tube amps are mods. Rock On
Sometimes I also find blown output transistors and very infrequently some blown TDA1514, very hard to find. I have made a replacement mini-board with an LM3886, which is cheap, available, and far stronger, and wire it to the corresponding pins (+-B, ground, etc.) on the original board.