I'm putting a TR-7 on my screen, but I only want the bypass to operate sometimes, mainly for tuning. I want to shut it off the rest of the time, and I understand that if you toggle a certain line it will do this. I think it's the remote in off of the headunit but I'd like to verify that.

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Alpine IVA-W200
Alpine PXA-H701 optical
Blade SE6175
Morel Elate 6 3 way active
Sony XM2000R
MTX 12" 7000 x 3 freeair

Finally moving into the 21st century...