HELP. my GK head is DEAD!

[Chef]

I had a problem with my MBFusions mute button. GK serviced no charge and covered shipping one way.
I had no probs with MB200, MB800, 1001RBII.
My 700RBII had a "pop when shutoff" problem. Gk was familair with this mis-behaviour, sent a parts list to my local auth serv ctr; and for $110 it as fixed, that was about evenly parts and labor. I bought that head used; fair enough.

 

[bumperbass]

I think GK is a good company. I have no qualms with Bob Gallien.
I think these threads are very destructive to any manufacturer. GK sells 250,000 amps, and someone says there's blew up and then the complainers are ready to pile on. I don't know where the line is with this. Obviously, there are some very unreliable brands on the market, and it's nice to know who they are. I'm glad there were some positive comments as well.

 

[the yeti]

I think GK is a good company.

I'm glad there were some positive comments as well.

me too. don't know if my comment was perceived as negative... it's pretty reasonable to expect damage when the amp gets dropped i think.

 

[Downunderwonder]

what's wrong? did you buy it? no? then don't worry about it.

And what if he had been the misfortunate one? What would you have to say for yourself then? "I'm alright Jack" is a disease bringing no good to anyone.

 

[ljazz]

I don't believe weather affects our gear the way some people believe it does. As someone else here once pointed out, you never hear of our car stereos or speakers crapping out on us because of the weather or changes in it. Amps also do a fine job of going from 140 degres in a trunk, to 50 in air conditioned room in a moments notice.

Materials used in automobiles are spec'd to be used in those conditions. Use of dissimilar materials that are fused together is typically a big concern during design reviews and up front failure mode analysis.

The effects jack oxidation issue with GK is well known (if I remember correctly, it is a materials issue)..... You certainly don't want to speed up that process by exposing your amp to condensation. The temp extreme you're speaking of really might not be a problem because available moisture in the air of a air conditioned room is probably pretty low. I'd be more concerned about going from 140 degrees to 75 degrees when the humidity is up over 80%. In my day gig, we fight with oxidation issues the most in the summer months.

 

[tonynoriega]

In 20 years of owning and using GK's (an '86 400rb and a much newer 700rb) I've only had two problems and both sounded similar to the symptoms the OP posted.

In both cases there were weak soldering joints that were repaired, and both techs said the same thing: GK's are prone to having problems with solder points.

In any event it's time to take yours to a reputable tech for evaluation.