Converting a JC-55 to stereo input?

[MattH96]

I've got a JC-55 with high/low impedance input jacks. I know the amp is 2x22.5W and you get the cool stereo effect when the chorus in engaged.
I'm wondering how possible/straightforward it would be to mod the input jacks to feed into the amps separately, similar to what can be done on the JC-40 model.

Is this worth pursuing further or is it a lost cause to attempt this?

[Enzo]

The problem is that ther is only stereo power amps. The preamp is only mono. So you would need another preamp.

[Mick Bailey]

That's your problem right there. The JC-40 is a much more complicated amp that's built as a true stereo amp right through the signal path - two of everything. The only stereo aspect to the JC-55 preamp is that the mono preamp splits the dry and wet signals to the individual power amps when in chorus mode. I think the best that could be done is to intercept the signal path into the power amps (which is straightforward), install a stereo socket, and use a dedicated outboard stereo guitar preamp. In effect creating the return side of a stereo FX loop, or 'Power Amp In' to use a Fender term. In my own view, I wouldn't go down this route as you lose all of the amp's controls when using the power amps in this way and end up with a much more complicated (and expensive) way to get stereo.