Background: I like using basic SS amplifiers, the amps that are part of beginners guitar & amplifier kits. Volume levels are low and I use a few simple pedals for my sound. A friend and I get together for a guitar session every couple of weeks, he too uses a small basic amplifier. One problem with those type of amplifiers is that they tend to be very 'boxy'. I solved this problem by using two amplifiers in the room, the connections being made from my POD2, a simple stereo setup.
Question: As I understand it, both speaker cones need to be moving in the same direction to sound 'right' rather than each cone moving the opposite way to its companion. My problem is that I can't tell which way my kit is working. It might be right or wrong, there is a 50% chance either way. I have three jack sockets and can wire them up with the tip of A to B, and C to the barrel. Plug the guitar into A and plug B or C into the amp, one will be the correct polarity and the other reversed. Could this cause any problem to the amps or the POD? Apologies if I used the incorrect term to describe what it is I am looking for [polarity]. I have an isolation device which prevents hum due to ground loop.
Thanks
Insanity: doing the same thing over and over again and expecting different results. [Albert Einstein]
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Comments
https://youtu.be/0BHQT3Omqtw?feature=shared
Sometimes, if the sounds of the two amps are very different, it can actually be quite difficult to tell, but the closer you get to a simple pure tone - use the neck pickup of the guitar - the easier it is to hear.
The easiest way to reverse the phase of one amp is to swap the speaker connections, if it has push-connectors - if it doesn't, then you'll either need to solder or use a chocolate-block connector.
One problem you may find if one or both the amps have switchable clean and dirty channels is that the two channels are not necessarily in phase with each other either!
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Ultimately you really want something like an ABY box eg a Radial Twin City, Lehle, GigRig or anything of that ilk which offers, phase reversal and isolation. This will give you the best results. You can also start playing around with wet/dry setups and all that other fun stuff. Note that cheap splitters like that red Fender branded unit you see everywhere are not sufficient for the job.
https://youtu.be/LH9FO1EMIPQ?si=pozZXR18TBwsqsju
Even my SuperChamp XD with its tremolo setting, is highly noticeable when in conjunction with my really loud 60w Fender Supersonic dialled with some grunt.
Is an addictive occupation (but only when the neighbours go out).