I would like to make a stereo effect. I have 2 amps. I also have another pedal that have one in and two outs.


I would like to use the Clone chorus as an example, I would also like to be able to apply this to some other fx also.


1)Would I just build 2 choruses in one box each with its own intputs and outputs?

3) Since the pedal before it would have two outs.
a) Take OUT A into IN A on the chorus then likewise with B.
 b) Then run A to amp A and B to Amp B.

4) Would I have phase issuses? Would I have to make a polarity inverter for the one of the ouputs? Or just set the wet/dry mix alittle different on each amps chorus?


I really want to run these modulation Fx in stereo like delay, chorus, trem, and phaser.


I guess they would all have to have 2 ins and out to connect to eachother.

Or would some kinda mixer work?

Any solutions or suggestions?

You need to experiment, as the results may well depend on the type of effect you are working with. For example, I have an AXL chorus pedal with 'stereo' outputs. In fact, one of the stereo outputs is just the dry signal from the input. When you run the outputs to two amplifiers, it doesn't sound like one-amp-with-chorus-and-one-without - what you hear subjectively is the difference between the two channels which sounds like one big wide chorus wash between the two amps - phase effects, you see.

Second example: I built an active crossover to separate bass and mid/treble notes on my guitar to be able to process them separately. It consists of two matched filters, one low-pass and the other high-pass. It sounds great, except that I still get the bass notes coming out of the high-pass channel. No faults, it's 'psychoacoustics' - you hear all the harmonics associated with the bass notes, and your brain fills in the rest. I can get much the same effect by just using the low-pass filter alone.

You can get some very cool effects using stereo channels, but experimenting is the best way to hit the jackpot.

Check out the Splitter-Blend.

Well, true stereo actually comes down to doubling your effects so you have 2 ins and 2 outs... What is more common is having a stereo output where there is usually a phase difference in the wet signal.

If you want to run 2 chains of effects, you would need to have 2 stompboxes for each effect essentially. Build your own, and you could also choose to put them in a single enclosure.

For choruses, the phase difference in the output signal makes the 'stereo' effect. I built a stereo small clone... but I don't have two amps yet :lol: (looking ahead!), so all I can tell you is, yes the second output only adds a inverting amplifier at the end of the wet signal path. I made two seperate wet dry mix pots, but I don't know what kind of sound that will create now... I really have to get my money together to build that AX84 P1 Extreme .


I have another question though.

In 'stereo' effects (1 in 2 out) what does the switch do? Does it switch both outputs on and off? And if so, do you need to add a buffer amplifier in bypass mode since your signal is split two ways?

So should I use R.G.'s "polarity Reverse" circuit?


I thought I read in the article it wasn't complete, but I might be confused.



It happens a lot :lol:

I don't know that one, but what you need is an inverter. If you have a opamp left from a dual opamp or something, you could use it to make an inverting amplifier, with unity gain. Google for that one.

If you don't have a spare opamp, you can just add one, just takes up a little more space.

The Splitter-Blend incorporates RG's polarity reversal circuit...