Switch with ease. The Radial JX42 a compact switcher that is used to matrix four guitars and two amps in the studio or on a live stage. Surprisingly powerful for a unit that is small enough to neatly sit on top of your amp connecting the optional JR-5 or JR-2 footswitches lets you rack mount the JX42. If you need a compact powerful guitar and amp control centre the JX42 packs a lot of functionality into a small shell.