ROG Tonemender

[El Heisenberg]

would this be a good replacement for two JFET fetzer stages with a fender stack n between? I getting fed up with all the problems with the second JFET and thinking of just going op amp. Could I run this on 12 or 18v?

[Pakaloabob]

Can anyone compare the performance of the Tonemender to Mr. EQ which is also from Runoffgroove. I see that Mr. EQ gives preset levels for bass, mid, treb. Is it possible that the tonemender could create the same boosts as Mr. EQ but also have more flexibility due to using pots instead of switches... or is there more to the story?

[oldrocker]

Well I noticed on the ROG website that the Tonemender is a tonestack and the Mr. EQ is more of a graphic eq.  Shelving type tone manipulation as opposed to frequency band manipulation.  I could be wrong but they're not going to be used the same way.  I have built the Mr. EQ and use it to get the mid and hi frequencies to stand out more (hi E, B and G strings).  I haven't built the Tonemender yet but I would use it as an overall tone shaper like an amp has (bass, mid, treble knobs).  As for replacing the switches with pots.  It sounds like a redesign of the circuit.  I guess it's possible.

[Pakaloabob]

I wasn't actually talking about changing Mr. EQ to have pots. I was just asking if there was more distinguishing the 2 circuits than pots. vs. switches, which I guess there is. I guess I don't really understand the concepts of "Shelving type tone manipulation as opposed to frequency band manipulation."
If anyone could enlighten me...

[B Tremblay]

As outlined in the project write-up, the Mr. EQ circuit adds peaks (or an optional notch, in the case of the MID switch).  The Tonemender is a clean boost with a three-knob tonestack.  If you download and run Duncan's Tonestack Calculator software (looking at either the Fender, Marshall, or Vox models), you'll see how the three-knob tonestack affects frequencies differently than the Mr. EQ, as shown in the response graphs.

[Pakaloabob]

...so Tonemender boosts the overall signal while allowing varying levels of hi/lo/mid to pass, whereas Mr. EQ boosts specific frequencies separately?
Still not sure if I totally understand the difference. I guess it would be a good idea for me to checkout the software to be able to visualize more clearly.
Thanks for the tip!

[oldrocker]

I'm going to try the Tonemender when I have time.  In the mean time I highly recommend the Mr.EQ though.  It really adds sparkle to a dull sounding guitar rig.