XLR Footswitch available for my Dumble Modded Fender Twin?

[Jack Gould]

Hi,

I am totally new to the site but I have a couple of questions. When I last had my amp tuned up, my tech told me that the little engraving above the serial number which read Dumble 4 22 77 meant that my '72 Fender Twin had in fact been Modded by Mr. Dumble and was therefore worth a lot more money. The guy who I bought the amp from back in '83 told me that it had once belonged to Stephen Stills, which once I had done some web research on Dumble's doings and his rarified clientele made sense. I do know that the dirty channel on my twin sounds much better than just about any other twin I've ever heard. My question has to do with the XLR output on the back panel of the amp. Until my latest round of Dumble research, I had always thought that the XLR output was for running straight into a live mixing board and/or direct studio recording (it does indeed work that way if you do it BTW). Now however from looking at a lot of the pictures posted of actual Dumble amps the XLR out is clearly labled as for a footswitch, so does an XLR footswitch exist? and what will it do? I'm hoping of course that it will tap into a long unused extra gain circuit. Also provided that I find a working footswitch there's no way I could harm the amp by engaging it right?

[Stanz]

My educated guess is that is an output as you stated, and not a foot switch. The 150 ohm, -30 dbm engraving to the left of the jack is probably a reference to its output level. Foot switches, assuming they are merely flipping relays, would not be carrying any signal. If it is carrying a signal, you are going to increase noise as it travels long runs outside of the chassis. Something tells me Mr D would not do that, but who knows.

I do know that the dirty channel on my twin sounds much better than just about any other twin I've ever heard.

A question, you say the twin has a dirty channel. Could you explain that a little further. Is there an extra gain knob, or just the standard one volume for the channel? Are there four input jacks?

Edit: a double post. I was confused for a second.