Amp switchers

keninsyr

Member
Messages
175
Does anyone run 2 amps together with an AB/Y switcher without having the tone suffer. I have 2 Allen Old Flames and have tried linking the channels and I picked up a Startouch AB/Y switcher which is a quality pedal but there is still a loss in overall tone from both amps. I seem to lose low end and output. I'm usin all Klotz cables so I don't think its line loss. Would love some advise.
 

Steve Dallas

Member
Messages
8,344
Well, you have a 1M grid leak on each input. Running 2 inputs in parallel halves those to 500K, which will leak a little signal to ground assuming you have not isolated the grounds with your switcher.

I'm not familiar with the switcher you are using, but I don't have this problem with my Lehle Dual.

You need a switcher that either optically isolates the grounds or uses a transformer design to do the same.

If you don't want to buy a more expensive switcher, you can try running a buffer in front of it to make up for the loss.
 

keninsyr

Member
Messages
175
Well, you have a 1M grid leak on each input. Running 2 inputs in parallel halves those to 500K, which will leak a little signal to ground assuming you have not isolated the grounds with your switcher.

I'm not familiar with the switcher you are using, but I don't have this problem with my Lehle Dual.

You need a switcher that either optically isolates the grounds or uses a transformer design to do the same.

If you don't want to buy a more expensive switcher, you can try running a buffer in front of it to make up for the loss.
What would I use as a buffer?
 

Steve Dallas

Member
Messages
8,344
Or any good boost pedal or OD pedal set clean should work.

I think I a lot of guys like the S Duncan Pickup Booster.
 

Tonefish

Member
Messages
5,281
Definitely sounds like a phase issue. There are a few pedals; Tonebone Switchbone, Framptone, Switchazel, Lehle, and maybe others that will have a phase switch to take care of this problem. It opens up a whole new world with the two amps together.

A regular whirlwind or other ABY will not work with this situation. Although, maybe a phase switch on the amp could fix it. I know with 2 channel amps, like the London 65, the phase switchable switch-pedal was a must.
 

sfarnell

Silver Supporting Member
Messages
10,260
I use a Voodoo Lab amp switcher and can switch between four amps or blend any of the four together. I'm not sure if it has a buffer in it, but it doesnt' seem like I'm losing tone.
 

keninsyr

Member
Messages
175
Thanks for the input. I'll probably have to experiment with the Lehle or something equivalent. I don't use any pedals so adding an overdrive or boost wouldn't be what I was looking for. Appreciate the replys.
 




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