Any mods to make an ac15 play nicely with a big muff

wayneirie

My amp has to go in for service can anyone point me in the direction of any mods, that will allow it to play nicely with a big muff?. (Top boost channel)

uncledick

I find my AC15 a bit fussy with overdrive pedals.  Fulltone OCD is my choice.

ecc83

Forgive my ignorance but which of the many schematics is it and what is the problem ?

Dave.

wayneirie

http://thefretboard.co.uk/discussion/109796/ac15-help#latest No idea of the model there's no normal channel. I use the big muff a lot, it does something weird to the vox, in the mid range. I was just wondering whether I could get him to clip a cap or something while he was in there.

bbill335

Mod the big muff instead. 

Cirrus

Only problem I've came across with big muff and vox (albeit 30-watters...) is not having enough clean headroom to get unity volume or a volume boost vs the bypass sound in a band mix - because the pedal's so scooped. Run it into a low headroom amp and all the bass eats up the headroom so you get a mushy, whooomphy sound with no punch that's no good to anyone, with a bit of harsh treble on top if you're lucky.

Big muffs like clean headroom, and especially clean bass.

So my suggestion for a mod would be, turn the amp down for more headroom, get a different amp, or get a different pedal.

Exorcist

This explains why my russian muff sounds SO huge through my Laney AOL 100w, masses of clean headroom and bass. Sounds Godly...

Modulus_Amps

Assuming it has a normal 100k/250pf cap in the tone stack your amp tech could change it to a 56k/500pf cap for mod low and high mids, will would work better with the big muff, but then it won't be a VOX anymore.

but without a schematic to look at who really knows, the AC15's of today are not the AC15's of yesterday

guitarfishbay

Cirrus said:

Only problem I've came across with big muff and vox (albeit 30-watters...) is not having enough clean headroom to get unity volume or a volume boost vs the bypass sound in a band mix - because the pedal's so scooped. Run it into a low headroom amp and all the bass eats up the headroom so you get a mushy, whooomphy sound with no punch that's no good to anyone, with a bit of harsh treble on top if you're lucky.

Big muffs like clean headroom, and especially clean bass.

So my suggestion for a mod would be, turn the amp down for more headroom, get a different amp, or get a different pedal.

Agree with Cirrus.

I love both Big Muffs and AC30s but I didn't find they played that well together when I had both.

ecc83

I doubt if it is early enough but I see some AC xx's have an EF86 front end? If that IS the case the valve will overload very quickly.

Dave.

stickyfiddle

You probably need too get some more miss out of the muff. Try a clean boost before it, or mod it to get rid of the massive scoop.

or just buy a Rat

ThePrettyDamned

No. Don't bother.

Buy a zoom ultra fuzz if you want an awesome fuzz that plays well, but muffs don't play with ac15.

Which is a massive shame as my favourite pedal has two muff circuits inside... 

Sassafras

Modding an amp to play nicely with a pedal seems like cutting off your nose to spite your face.
I'd try to find a pedal that plays nicely with the amp.

thermionic

What fuzz pedal works well with an AC15 then? Mine is a mid-90s Marshall-built AC15.

mal1971

I have a couple of ac30s and they are picky about overdrives, distortion, muffs.  I get best results from a hybrid boost/od to push the amp harder.... tubescreamers and muffs somehow make the amp sound less.

ThorpyFX

The fallout cloud plays nicely with both an AC15 and an AC30.