#1
Yeah, so my amp(Carvin SX-100) broke a while ago and i got it fixed at the start of January. The problem was a faulty mosfet causing the volume to die and the amp sounded all muddy. Anyway, Yesterday i turned on my amp, and the EXACT same problem came back. Thing is i had owned it for about 2 and a hhalf years with no problems at all and now its happened twice.

Yeah, so im pretty angry and wondering if anyone has experienced this. I think it may be a problem with the board in it causing it to burn out the mosfet, but it broke 1 month after being fixed.
#2
Actually, does anyone know anything about Mosfet's and if they are all about the same quality because i'll tell them to put an expensive one in to replace it.
#3
I would not tell them to put a high priced mosfet in.

80% chance is there's something else causing that mosfet to burn up. Until you find out what that is I would suggest saving your money on replacement mosfets...

Just my opinion.


Another way to go is sell the amp on eBay for parts/repair and get another amp...
#4
After just one month Carvin should fix that under an "implied warranty", which means that there's no way it should fail after just a month so they should fix it for free. Be sure to give them the entire story so they can diagnose the actual problem rather than just swap out parts.
It's a fine line between clever and stupid.
#5
Well, the amp is never mistreated in anyway at all. It is a 100 watt amp, never turned up past 5 (only happens once a week during jams), and hardly gets used during the week because i use my bro's marshall combo. I think it is a problem in the amp itself thats burning the mosfet out, or the tech did a dodgy job with the replacement.