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  #1  
Old 11.21.11, 11:57 PM
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duel amp hook up

Hey to all! I’m looking for some help with running two amps together? I have two 4x12 cabs both at 8ohms and two 100 watt tube heads. I’m seeing a lot of different ways to run them and some having a chorus or delay pedal between them. also channel switching is there a way to due both amps at samre time or do i need to custom wire the original foot switch? does any one has any ideas on What’s the best way to run this set up? Thanks!
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  #2  
Old 11.23.11, 1:17 PM
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"Dual" for the spelling check

And to run both, you can use a stereo pedal to run both amps as mentioned, like a Chorus pedal, or a Delay pedal. Or they make ABY switches, which will select either amp "A" or amp "B", or run both in "Y".

If you prefer the sound of one amp over another, you can slave out the preamp as well of one of them, into the effectsloop return of the other amp. If you like the sound of both blended together though, this may not get you that, but the sound of the first amp, through the second amps power stage.
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Old 11.24.11, 1:09 AM
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Big problem with 2 amps is the hum you'll get when using em together...... by using two amps you'll get two main grounded machines that'll cause hum and problems......

Only solution is to use an isolated A/B box so both signals don't tend to overlap!

DON'T USE THE GROUND LIFT!!!!!!! IT KILLS!
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Old 11.24.11, 4:10 AM
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Nah, man, the spelling is right. They're gonna fight over the hook up.
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Old 11.24.11, 1:12 PM
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Try something like the product above.
Ground lift works pretty well.....but only if you are in the "Y" mode all the time.
I assume you will always be connected to a load.? That is to say.......you will be using a 4x12 for each amp head........?
Good Luck
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Old 11.24.11, 1:15 PM
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Originally Posted by asatbluesboy View Post
Nah, man, the spelling is right. They're gonna fight over the hook up.
I needed some good, clean, humor Thanks
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Old 11.24.11, 3:12 PM
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Try a Boss LS-2 for a cheap solution, it works for me, plus the volume feature means you can dial in as much/little of one or t'other amp as you like (plus it's a pretty good clean boost).
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Old 11.25.11, 2:08 AM
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Quote:
Originally Posted by trem View Post
Tonebone Switchbone - introduction

Try something like the product above.
Ground lift works pretty well.....but only if you are in the "Y" mode all the time.
I assume you will always be connected to a load.? That is to say.......you will be using a 4x12 for each amp head........?
Good Luck
Even in Y mode I would not recommend a ground lift!!! When the voltages start to pump it'll also hit you!

Just be safe guys
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  #9  
Old 11.25.11, 7:56 AM
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Quote:
Originally Posted by berarduur View Post
Even in Y mode I would not recommend a ground lift!!! When the voltages start to pump it'll also hit you!

Just be safe guys
How does the "voltage hit you".?
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Old 11.25.11, 8:38 AM
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Quote:
Originally Posted by trem View Post
How does the "voltage hit you".?
When you become the ground, instead of the plug.........
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Old 11.25.11, 12:58 PM
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Quote:
Originally Posted by Supergrunged View Post
When you become the ground, instead of the plug.........
I think there may be some confusion with the term/meaning of "Ground Lift".
I have never "lifted" the Mains Ground......it is the signal ground that loops with the chassis current of another device.....whether through proximity or just plain redundancy.
That has always been my understanding anyway. I would never suggest somebody remove the chassis/safety ground. Even an amp with a 2 wire cord can ground loop.
It is kind of the same principle as using shielded cable at the Main Input. You only ground the end at the input, and you "Lift" the ground at the tube end of the cable.
Best

Last edited by trem; 12.03.11 at 8:29 PM.
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  #12  
Old 11.25.11, 3:45 PM
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This subject seems to come up regularly as of late. There are many ways of doing it. I have been using multiple amps for over 40 years. The simplest, easiest way to isolate the amps is to have a stereo pedal that has isolated grounds last in your pedal chain. Personally, I almost always use a transmiter on my guitar(s). I dont trip over cables and I dont get the blue flash of death from a mic. You never know what the AC mains ground situation is at a venue. You could have brand new 3 wire plugs from a remodel with no grounds. As far as your channel switching goes. Just use the 2 footswitches, you could make it more complicated but why? Btw, hum is part of life. My rig is whisper quiet. I had a gig last week with a horrible hum un stage. It was just in that club. It was from the massive lighting rig and I use a Strat with a lot of gain. Nature of the beast.
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  #13  
Old 12.06.11, 4:40 AM
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hey thanks for the replies! I am still doing research and hopefully i don't ruin anything! I guess the ground thing has me confused. so if i run the two amps individually with their own cabs i still will have a ground issue?
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  #14  
Old 12.07.11, 1:41 AM
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Quote:
Originally Posted by arnoldtheduck View Post
Try a Boss LS-2 for a cheap solution, it works for me, plus the volume feature means you can dial in as much/little of one or t'other amp as you like (plus it's a pretty good clean boost).
I've recently tried using my LS-2 to split the signal between 2 amps and I got hum. It may have been the particular arrangement of amps, cables etc but I don't know as I never bothered getting to the bottom of it. Must try again soon.
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Old 12.08.11, 12:51 PM
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Quote:
I've recently tried using my LS-2 to split the signal between 2 amps and I got hum. It may have been the particular arrangement of amps, cables etc but I don't know as I never bothered getting to the bottom of it. Must try again soon.
I get hum when I split between my Orange TH30 and my Roland, but not when I go between my Roland and my solid-state Vox AC30... I wonder why that is? Surely solid-state circuitry isn't the solution, since they're all powered off the same mains?
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