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Posted by: herrb Nov 16 2009, 11:58 AM

Hey guys!

I got the following probem: When i turn my Marshall 100Watt Hybrid amp to OD 2, there is a constant piiiiiieeep tone. When i turn on my Boss MT2 serials in front of the amp, there is an additional schhhhhhhh tone ( damn whats that word in english??^^)

Do you know anything i could do against that tones? i have thought of a noisekiller from boss, but would that kill the ppiiiiieeeep tone of OD 2 too? because this annoying tone only appears on OD2 it's less loud on OD1 and not there at CLEAN.

thank you guys!

cheers, peter

Posted by: ZakkWylde Nov 16 2009, 01:56 PM

Is it feedback from your guitar?

Go to OD-2 and turn the volume of your guitar down, if the peep-noise vanishes then we are talking about feedback which results from the gain and volume resonating with your guitar strings...

You can try to use less gain, step away and turn away from your amp when playing. Oh and you shouldn't use the MT-2 over the od channels, only through the clean channel as it is a distortion pedal not a booster or OD.

The Boss MT-2 has a built in noisegate which reduces some of the noise, the shhh sound is your amps distortion-humming. That's normal for an amp when runnig it on high gain, the MT-2 is just surpressing it when turned on

Posted by: MickeM Nov 16 2009, 02:11 PM

piiiiiieeep could be feedback from your guitar
schhhhhhhh is probably since you run the MT2 from the wall socket instead of batteries.

Posted by: ZakkWylde Nov 16 2009, 02:35 PM

Sorry to hijack the thread but MickeM, is there a wayto power my pedals from the wall socket and NOT to get that annoying humming noise?

I can't power all of my pedals with batteries since they don't last long enough...

Posted by: MickeM Nov 16 2009, 02:59 PM

I havn't tried these "fuel tanks" myself, that quite a few companies produce, but that could be worth a try.
I bought a simpler model with a chain of plugs for the pedals, can't even recall the brand, which I use when we're rehearsing. It's not silent.
For gigs I always use batteries.

There are rechargable 280mAh 9V batteries at reasonable price. 300-300mAh are still a bit too expensive I think, 280mAh is reasonably prices. Will last you quite a while.

There are "purifiers" that'll remove the hum but I havn't tested one of those either.

Posted by: herrb Nov 17 2009, 11:21 AM

hey! i tried the feedback thing, but im sure it's not the feedback from my guitar. the sound appears even with the guitar turned off. i think it comes from the amp with a modulated signal from my pedals...

Posted by: MickeM Nov 17 2009, 01:13 PM

Preamp tube running bad maybe or just a noisy preamp.

If your pedals are causing it that shouldn't bee too tricky for you to sort out which one. You could add a noise gate in the chain of pedals to rid of it.

Posted by: herrb Nov 18 2009, 08:48 AM

ok great, so what can i do agains a bad running preamp tube? i guess not much : (

greetz , peter

Posted by: MickeM Nov 18 2009, 11:33 AM

Exchange the tube for a new one. But mind that preamp tubes run for many years in the normal case so unless your amp is old it's not likely.

Posted by: Ivan Milenkovic Nov 18 2009, 11:36 PM

Sure there is, just get a power adapter that has a filter built in. There are many out there, even Boss BSB60 pedalboard adapter has one, and there is no hum.


Not much is correct - all you have to do is buy 12AX7 tube and replace the old one. You can do it yourself even. Unscrew the amp, pull out old tube, and insert new one. Try to get a good 12AX7 tube. (12AX7 name is the same as ECC83 name, it's a standard preamp tube, you won't go wrong buying any of the tubes named like this. Try to take a good one. I recommend Groove Tube, or JJ tubes, they are quite good and standard).

Posted by: herrb Nov 19 2009, 01:14 PM

thanks a lot ivan! i will think about buying one of these tubes. what do you think of a mesa boogie tube? it costs the same as the groove tube, about 25€. As i'm playing metal, a very high gain tube would be brilliant. now, i have to push the amp with the mt-2 in front of it so i get enough distortion. only OD 2 with high gain is not enough.

what you said about the Boss pedalboard (i suppose you meant the BC-60) was a bit irritating, i use this pedalboard and my boss MT-2 makes hum when it's turned on : (

greetz, peter

Posted by: MickeM Nov 19 2009, 02:54 PM

You could put a Rocktron Hush right after the MT2. Or a EH Debugger (I think it's called that) for silencing the 50-60 cycle hum.

Posted by: herrb Nov 19 2009, 05:10 PM

what is a 50-60 cycle hum? sorry i really don't know^^

Posted by: Daniel Realpe Nov 19 2009, 06:34 PM

I had a similiar problem with a Fender I used to have, I had it fixed, I think it was the tubes

Posted by: Ivan Milenkovic Nov 19 2009, 11:12 PM

You're welcome mate. Mesa Boogie tube will work as well, no problem there. You won't get that much extra distortion out of it tho.

BCB60 pedalboard has a filtered power adapter that is working just fine. If there is hum, it is not from the adapter, the pedals you have or the guitar is noisy. The hum from MT2 is normal if you are using the pedal cranked, as it is probably amplifying the noise that is in the signal anyway.

However, there IS some degree of hum that Boss Pedalboard is producing, but it should be a very minor thing, definitely not something that should be audible that much. So the problem is elsewhere.

Posted by: MickeM Nov 19 2009, 11:21 PM

It's the hum from the electric outlet, like a constant eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee sound.

The Hush- or EH Degugger (and others) pedal will reduce this and other unwanted sounds from pedals. Put it after your distortion pedal and it runs silent, no matter if it's the dist pedal that noisy or the outlet.