Fender Normal/Vibrato channel phase

[evil79]

Hello gang, I've got a question about the phase issue when bridging any Fender with reverb. I already know that they are out of phase, and playing both channels simultaneously w/ an ABY box will be wonky and crappy, but I found this post online and wondered if any of you guys could back this up;

[Three subjects: 1. If you plug two input into separate channels of a
> blackface Pro Reverb are they out of phase?


Yes, but an MXR Dynacomp in-line to the second channel will invert the
phase. With an A/B/Y box that gives the Pro Reverb (and most older
blackface amps) very flexible tone.


I go into the ABY with my guitar and send the straight signal to the
Vibrato channel with the tone controls set a little bright. The
compressed and slightly boosted signal goes to the "normal" channel
with the tone set a little dark. The contrast is very nice and the
boosted/compressed tone is very nice.]

Never heard this/tried this before. I have both a Dynacomp and many fenders with reverb so I'm curious. Yeah, I know, I could just try it out myself, but I figured someone here needed to either corroborate or condemn this statement officially.

[phsyconoodler]

It's the number of gain stages that makes the two channels out of phase.Add another gain stage in the form of a the Dyna-comp and they are in phase and work like jumpering plexi channels.More gain.
They still work when jumpering to a certain extent without the dyna-comp,but they get to a point and then they fight against each other and actually the gain drops.
I use normal channels to mix in Delay.Works like an effects loop.

[evil79]

I never thought about it like that before. Pretty cool. I know what you mean about the channels fighting each other only at certain points on the dial. I like your idea about using the normal ch as an fx loop. You're a clever one. So would any pedal be considered a gain stage? What If you have a pedal board with alot of pedals?

[Jerry Glass]

If you have a delay or chorus pedal that has both an inverting and non-inverting output, use that. The outputs retain the 180 degree phase relationship even when the effect is off.

[walterw]

there's also the fun trick of keeping the two channels out of polarity, tweaking them to close to the same volume (maximizing the cancellation), then firing up the tremolo; as the second channel swings closer and then farther away from identical volume with the first channel, the cancellation comes and goes, creating a nifty almost univibe kind of effect.

[strat56]

This works great for using both channels and does many other things as well.

Barber Launch Pad