I know how to jump the two channels with a patch cable. My question just for education's sake is this: why does this work? Signal goes from guitar to normal high input, then from low normal INPUT to top boost input. Is there a mechanism inside that switches it to an output because it assumes that's what you're trying to do? Just confuses me that the signal goes out from one input to another.

Jumping....like on an old Marshall or Fender.?
Kind of the same principle as "daisy chaining' speaker cabs. Once you parallel both inputs (with a patch cable) of ONE channel, the same signal appears on the plug of the patch cable. Wherever you insert the patch cable, it will carry your guitar signal.
Am I understanding your question correctly.?
Best

I'm pretty new to really learning the electronic workings of equipment, but I think I get it. It's not the audio signal passing through one then another then to the amp, it's simply electronic current affecting the signal which is free to flow both ways from each jack. Thus whatever jacks the signal touches are effecting the one single signal eventually going out as audio. That about right?

The audio signal IS an electric current. Its just a current with the voltage changing at the same frequency that the string vibrates (in the simplest explanation). Everything between the guitar strings and the amp's speakers is just an electric current with changing voltages (unless there's something digital in your signal chain)

For our purposes, the audio signal will behave like any other electric current through a circuit. The same thing would happen if you had 2 9V batter clips attached to the positive and negative terminals of an LED. So imagine the 2 wires from one battery connecting to the 2 terminals of the LED and the 2 wires from another battery clip connecting to the same 2 terminals of the LED at the same points. So, the 2 battery clips are effectively connected to each other as well as to the LED. Now, you could connect a battery to one clip and the LED would light up. You could connect a 2nd battery to the 2nd clip and the LED would get more power OR you could also touch another LED to the terminals of the battery clip and it would get power from the 1st battery and both LEDs would light up.

So how does this relate to the guitar and amp? A string passing over the magnet in your pick ups induces a current to travel travel out your guitar, thought your cable, and into your amp. So, in this case you could think of the pickup as a battery (since they both cause a current to travel through a circuit), you could thing of the amp input jacks as the battery clips, and the amp as the LED. Since the jacks are effectively wired directly to each other, as long as there's something causing current to flow, connected to one side, the other side can be either another input, or an output.

Is that more clear?

Its just great explained on the official Voc website.
Its a great sound i switched from the marshall JVM to the Vox ac 302c a great improvement for the allround sound the marshall stays on for the heavy stuff.

Yes you can. Basically you are feeding a signal into both channels and it gets mixed at the phase inverter in the power amp section. By setting the volume of each channel you can choose how much of each channel is going through to the power section.

At the moment I use two AC30 CC2s on stage for a stereo effect. I use a marshall panning effects pedal for one of the songs. most of the other songs i just use the two CC2s with a couple of boss pedals (Digi Reverb, Blues driver, digi delay etc.)
However one of the songs I use an accoustic and run it through the normal input for a warm clean sound then change it back to the top boost channel to finish out my set.
Is there a neat way of using a foot switch channel select for the two amps to change from top boost to normal with the tap of a foot switch then back to top boost at the end of a song?
(if so would there be a big loomed cable running out of the foot switch?)

the other issue is that normal channel is at a much lower volume than top boost so I usually increase the volume up a good bit. I presume I would just have to hit foot switch and quickly adjust the volume on amps myself.

I hope I have explained this okay?

I thought exactly the same as you gibsonsgvox, but I discussed with our Valvetronix.net techy Retrobob & he assured me it was exactly the same thing. See our detailed 'conversation' on the other thread.