I've been looking for a list of all the guitar amplifiers GK has produced over the years and cannot find a single resource on the net that lists them all chronologically (or in any other fashion). I own a 250RL which I dearly love and was wondering about the others that came before or after. Are there other gems in the GK stable?

Hello all!

I have just registered at ssguitar.com although I have been visiting this site for some time now. I have been eyeing a locally advertised MGP 9004 preamp for some time now and have a few technical questions I hope some of you forum experts and EE's will be able to give me some advice on

1. I have attached what I believe are the schematics of the preamp. I was wondering if the preamp bears any resemblance to another marshall preamp design, and how different is it from the preamp circuit of the 8100 Valvestate mk1 head (I can tell the 9004 lacks the contour control of the 8100)? I have been looking for an 8100 at a good price locally to no avail.

2. In your opinion and from an engineer's perspective, is this a good example of a solid state guitar preamp? Is it worth more than 50 dollars on a rainy day?  :lmao: The example I'm being offered comes with original wall-wart PSU, the rack ears have been removed however by a previous owner in order to cram the poor thing into some combo enclosure Seller is asking 60€ shipped for the unit. Or is this just another stompbox crammed into a rack enclosure to make it more appealing to "professionals"?

Thank you in advance all replies and opinions are appreciated.  :dbtu: