With this American Loopers Aux Switch you'll be able to switch two AC30C2 at the same time as it has two outputs (one for each amp) 

For example, button A will switch Reverb only on both amps, Button B will switch Tremolo only on both amps.

* you must use a TRS cable for each amp, let us know if you need one.

Dimensions:
4.51 X 2.52 x 1.02 (inch)
115 x 64 x 26 (mm)