Old Seymore Duncan Gear

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Hey guys thought someone here might be able to give me some advice about my amp.

Firstly - My rig: Im running an old Seymour Duncan KTG-1 Guitar Pre into a Seymour Duncan KTG-2100 Power Amp. These drive a Seymour Duncan 4x12 cab. I play Epi Les Paul Standards and I plug in thru my Yamaha Magic Stomp and an Ibanez Smashbox Distortion pedal.

I have 2 major problems, both of which I attribute to dodgy tubes. Firstly, when you push the volume up on the power amp (past about 1/3) you loose any tightness in the sound, it doesnt distort as such just becomes flabby and loose. It is particularly noticable when using the distortion pedal or the distortion of the magic stomp

Secondly, When playing at moderate volumes the clean channel of the preamp is really beautiful and full of life and colour but at any settings the overdrive channel is basically un-usable. It is incredibly bass heavy, loose and "farty"

As I said above I think that I need to replace the tubes pretty much across the board but I would really like to hear from anyone who owns one of these and get their experiences opinions. Also, if you're a tube nut you could point me in the right direction as to which brands/models would get the hard rock/metal tones that im looking for. The power tubes are KT88's and the pre tubes are 12ax7's and 12au7's.

Thanks guys!
 
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Re: Old Seymore Duncan Gear

I have no idea, i have owned the thing for about 6 months and its had 2 owners before me as far as i know. The guy i bought it off told me that he never serviced it at all :(

I did take the lid off it today to have a look. In the Power amp its got 2 German ProComm 12AU7's and 2 unbranded/unlabled tubes which im assuming are the 12AX7's and 4 RAM KT88's.

In the pre is has 3 tubes - An unbranded tube, a RAM 12Ax7 and a GE 12AU7.
 
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