Issue running 2 amps out of HX Stomp

[loydall]

Hi - I run my HX stomp in 4CM into an orange terror stamp. My aim is to get a second amp (maybe another terror stamp) and run that in 4CM as well, splitting the output of the FX Send and then running 2 chains through stereo effects out to the 2 amps giving me potential for stereo setup and wet/dry set up.

 

I haven't yet purchased the second amp but I thought, just out of interest, I'd try hooking the Right output of the Stomp directly to a FRFR speaker I have, just to get an idea of stereo sound etc. But - when I attached the speaker to the right output of the HX Stomp it just created a fluttering sort of sound in both the terror stamp/cab and also the FRFR. At first I thought it might be the FRFR as there was no guitar sound at all coming out of it, just the fluttering sound so I tried another FRFR and got the same issue. After a bit of messing around I found that if I switched the terror stamp off the FRFR stopped fluttering and the sound of the guitar came through nice and clear.

 

This wasn't just a slight hum but a proper pulsing created by adding the FRFR to the right output of the HX Stomp.

 

Now I'm concerned this issue will be the same if I buy a second amp.

 

Is it a realistic expectation to be able to run 2 amps out of HX Stomp both in 4CM? I would have thought it was given there is a right/left fx loop and output from the Stomp.

 

Any thoughts what the fluttering was? Like I say, there was no guitar sound from the FRFR (right output) when the terror stamp was turned on, just the fluttering sound. But, when I turned off the terror stamp, the fluttering stopped and the FRFR produced the guitar sound, nice and clear.

[loydall]

Update on this one, there's definitely some sort of electric interference going on. I thought I might get hum attaching 2 amps but the fluttering sound was really unexpected. I just tried it again but without the FX loop so - guitar > HX Stomp > Left main out to terror stamp, Right main out to FRFR and I get the same thing.

 

But - I noticed that even when I switch the FRFR off I still get that issue so there's something going on with the electric circuit.

 

Is there anything I can do about this?

[rd2rk]

To split the FX Loops you need to use an INSERT cable:

1/4" TRS to dual 1/4" TS.

Use the LEFT (TIP) Send and Return to one amp, RIGHT (RING) Send and Return to the other.

You'd need two S/R Blocks, one in Path A and the other in Path B, with the mixer panned as in the attached demo preset.

 

Dual 4cm.hlx

[loydall]

1 hour ago, rd2rk said:

To split the FX Loops you need to use an INSERT cable:

1/4" TRS to dual 1/4" TS.

Use the LEFT (TIP) Send and Return to one amp, RIGHT (RING) Send and Return to the other.

You'd need two S/R Blocks, one in Path A and the other in Path B, with the mixer panned as in the attached demo preset.

 

Dual 4cm.hlx 4.29 kB · 0 downloads

 

Thanks but that's not the issue. The issue is simply having 2 amps attached to the helix. If we forget about the FX loop for a moment and just take a simple setup with the main output L/R of the helix running into 2 amps (one being FRFR). As soon as one of my amps is turned on (the terror stamp) it introduces a pulsing/flutter into the signal. Some sort of ground/interference issue I would guess.