well thats what the boss pedal is, i wanna know if it does what i want it to do.
The BOSS pedal is a switch to switch between 2 different amps, not 2 different channels.

I'd recommend you buy yourself a distortion pedal. This way you can put your CUBE-15 on clean, and when you turn on your distortion pedal, you'll get a lead tone.

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Go to where you got the amp and buy the BOSS cube footswitch. Otherwise just buy an OD pedal.
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Get a Boss FS-5U footswitch if you want to switch between clean and distortion. You should get 2 of 'em so you can switch the effects.