Tone Stack Position?

[LooseCannon]

Hey all.
I have a seymour duncan convertible amp and i've read about a mod that makes it sound more like a marshall. The mod involves changing the tone stack from before the preamp to after the preamp. Is this like pre and post distortion eq difference? Will putting an eq pedal in the effects loop give me the same effect as the mod?
It also said that fenders uses tone stack before the preamp and marshalls after the preamp. What about other amps like Soldano, Bogner, VHT, Splawn?

 

[AdmiralB]

Re: Tone Stack Position?

The tone stack will always be in the preamp. I think what you're getting at is whether it is before or after overdrive. Marshalls and most tweed Fenders place it 'late' in the preamp, so the tone controls shape the clipped signal.

BF/SF Fenders place it very 'early' in the preamp, which does a couple things - first, it reduces overdrive available (assuming the same number of gain stages) because the tone stack 'throws away' a lot of signal in the process of doing its job. Second, it also tends to make for flabbier bass once it's distorted.

Boogie Mark Series amps are essentially BF Fenders with a couple cascaded gain stages placed after the tone stack. This is why most guys turn the bass off (or close to it) on these, then boost it back with the graphic EQ.

 

[joelap]

Re: Tone Stack Position?

The tone stack will always be in the preamp. I think what you're getting at is whether it is before or after overdrive. Marshalls and most tweed Fenders place it 'late' in the preamp, so the tone controls shape the clipped signal.

BF/SF Fenders place it very 'early' in the preamp, which does a couple things - first, it reduces overdrive available (assuming the same number of gain stages) because the tone stack 'throws away' a lot of signal in the process of doing its job. Second, it also tends to make for flabbier bass once it's distorted.

Boogie Mark Series amps are essentially BF Fenders with a couple cascaded gain stages placed after the tone stack. This is why most guys turn the bass off (or close to it) on these, then boost it back with the graphic EQ.

Precisely.

I didnt like the gain on the Mesa Mark IIB I had for 3 days. Bass was flubby and highs were piercing. couldnt dial it out. I've always been more of a Marshall guy myself though anyways:banana:

 

[LooseCannon]

Re: Tone Stack Position?

other thoughts?

 

[LooseCannon]

Re: Tone Stack Position?

Can anyone tell me which frequencies to cut or add on the eq I put in the effects loop of my SD convertible to make it sound more like a marshall? (It's voiced like a Boogie)