- Dec 7, 2009
- Reaction score
- The Great White North
I agree with the above. The Plexi circuit is about blending the high and low side.
Look at my image to your left.
That's what is referred to as Jumping the 4 Holes. You can reverse it and run your instrument cable into the low side. I suggest you do both and adjust the amp's controls without looking at the numbers. A Les Paul or any humbucker begs for the high side. That being said, i run a Strat into the high side as well. Speaker types also matter.
A Tele bridge pickup is already kind of spikey so try to roll off some highs on your guitar. Plexi type amps require using your on board guitar circuits to match what you are playing.
Set the amp up however you want, but I would suggest begin the initial set-up on Low Power (5 watts) and then try Jumper A (high input) and Jumper B (low input) and each time place all the knobs on 0 (minimum) then simultaneously increase the High Treble and Normal side until the amp begins to break up.
Don't use any of the EQ or Presence until the High side and Normal are close to sounding okay. Rarely does anyone ever crank these gain channels and they usually end up between 11 and 2 on the clock dial. Adjust to taste, etc.
Once you have some gain and the amp is breaking up but isn't excessive, then begin SLOWLY increasing the EQ. Once the EQ is close, then add some Presence. EQ settings rarely go above noon. Usually less. This is speaker and cabinet dependent, but you get the idea.
At this point you are getting close, but then go back to tweaking both gain knobs. The EQ side activates those circuits to complement the natural tones of the preamp/gain side. Also note, the SV20h is a "power amp" focused amp. The tones everyone chases are on the power amp side. The preamp and EQ helps push it, but isn't the primary basis for the final tone. This is hard to explain.
Everyone does this different, but a Plexi type amp requires a different approach to get THAT sound.
Make sure the amp is set to run on the neck pickup and not sound too muffled. When you switch to the bridge pickup, expect to roll off some highs on the guitar.
Again, there's no one way to do this. Just keep experimenting, but part of the tone is rolling off the guitar volume maybe 10-30% and always leaving enough room on the volume for that extra push.
A good boost pedal or mild drive pedal goes a long way with the SV20h. Hitting an amp that's already into break up doesn't require much to push into that glorious Plexi sound.
Speakers make a difference in taming the spike of a Tele, Strat, etc.
This is great, thanks. As soon as I actually have toime to mess around with it, I will follow this advice.