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GK MB200 Go Boom. Pants go Brown.

Correct, there could be other issues which is why we don't just replace modules without verifying that the rest of the circuitry works correctly and there are no additional issues. I have test fixtures for my products to do this... there's nothing worse than buying a new module, popping it in with "high confidence" and it fails again because there was indeed something else wrong. That's when a simple repair gets expensive in a hurry.
Just keep trying! Eventually you'll find one that works!
 
  • Wow
Reactions: agedhorse
Hey all...
Here's a new one...I plugged in a BRAND NEW, straight from the factory, out of the carton GK MB200, and POW! Literally almost turtled myself....familiar smell. Not me; the amp! Power Amp go boom. Anyone ever replace one before, and was it difficult? I did some snooping, and found the power amp here:

View attachment 7569282
This ever happen to anyone before? And, YES, before y'all comment to " Send it back", as I already did... I explained the situation to Sweetwater, and they took care of me, 100%. Replaced, free of charge!
I would have a qualified tech do this.
I get the Phil Hemdrie reference.
 
I know there are lots of GK fans here. And I used to be an enthusiastic one. I Love the tone of GK amps - especially their Contour.
But I had 2 identical combos that both fried. After one, they still had a strike left, but after two, that was it. Never again.

There lots of ring of death threads here.
I've also had terrible luck with the MB stuff. I have a 700rb2 I've played 1000 gigs with but I'll never own another GK MB series amp.
 
3 total. Terribly loud intermittent noise for 2. A third just died. All had scratchy pots, apparently a known issue. I love GK, rocking a full GK rig since 2008.
Thanks for the quick reply. I have an MB210-II and LOVE the sound. I may also be getting an MB115-II sometime this week if the deal goes through. So I'm naturally concerned about the reliability of this series.

EDIT: I play at home and never crank any of my gear to "live" levels. But I do buy most of my stuff used so someone else may have cranked it to the hilt.
 
Man, I've only had one issue in near 20+ years of various GK amps. I had an MB112II combo that I got used, used pretty hard for about 4 years, that crapped out on me. Otherwise I've had several others over the years and now an MB200 and Legacy head that haven't let me down yet, both about 3 years in, and they get worked.🤞
 
I've also had terrible luck with the MB stuff. I have a 700rb2 I've played 1000 gigs with but I'll never own another GK MB series amp.
I bought my MB112ii new and it died with barely any hours on it. I had it fixed (this was post-warranty) but I don't trust it anymore for gigging.
 
Decades ago I worked with an young EE. He designed a board that used a rather expensive custom hybrid chip. We ordered 6 of the chips for engineering prototypes.

He put the first chip into his new board and POP went the chip. Hmm, must be a bad one. He put in the 2nd one. POP. It was only after trying and destroying all 6 that he finally checked the board only to find a layout error and power was going to some non-power pins.

Expensive lesson that I'm sure he never forgot. I didn't even do it and I've never forgotten it.