Peavey Mace Mods

[skynyrd]

Here ya go, the tone pot for the bridge is the stock pot, have switched everything else out with CTS pots going to pick up a new pot for the bridge, This will give you an idea of how she sounds now.
YouTube - soundcheck1.wmv

[iwantmypie]

very cool. i've been thinking about getting some new pots for my ax as well. what about the mods you had done on the amp? care to share?

[skynyrd]

These mods will work for the Mace VT or the Deuce VT
change
C52 and C30 from 270pf to 500pf to boost the highs
C53 and C31 from .033uf to .001uf for less mud
R45 and R81 from 47K to 100K to smooth out the mids.

[iwantmypie]

These mods will work for the Mace VT or the Deuce VT
change
C52 and C30 from 270pf to 500pf to boost the highs
C53 and C31 from .033uf to .001uf for less mud
R45 and R81 from 47K to 100K to smooth out the mids.

so i finally decided to try out these mods, i just wanted to double check with you the values you listed were correct. i don't know if you've ever heard of it but there is a cool program out there called "duncan amps tonestack calculator". it lets you plug in different values and shows a frequency response of your adjustment. you can use the fender preset and plug in the mace values from your schematic, they are almost exactly the same design.

reason i'm asking you if you don't mind double checking is because i tried out the values to shared and i got some weird results, especially when changing C53 and C31 from .033uf to .001uf, it almost makes the Mid control completely unusable. if you plug those values in on the tonestack calculator you'll see the dramatic change that occurs to the frequency response. could it possibly be a .01uf cap? that would make more sense.

[Enzo]

REmember to put the tone stack in question in the context of the amp it came from. The exact same stack that sounds great in a Fender Twin might not sound so great in this PV Mace VT.

[skynyrd]

Those are the values given to me by a local amp tech, when I was running the Texas Heats in the cab it made a very nice difference as they are very low end aggressive, low to moderate mids and subdued high end. Now that I have the Celestion 70/80 speakers I am having to put the lows and mids on 10 and the highs on 6 to get a fairly even tone, so I will be modding the tone stack back to stock since the speakers completely changed everything. I would play around with the values, maybe leave the bass at .003 and change the mids out to a 60K or 70K and see if that helps. I would find out what the EQ dynamics are on your speakers then decide what ends of the amps tone stack need to be modified and then experiment with different values. Without knowing what kind of guitar and pups you have and what kind of speakers you are running and what their character is I doubt anyone could give you a exact value of each componant to change to get it where you want. Just use the values I listed as a starting point and let your ears decide what needs to be what next. Mod the tone stack to your guitar and speakers is the best advice I could offer, wish I could be more help. Let me know what you end up with.