Personally if I used an Aguilar THDI I’d likely just leave ACG engaged all the time and try to adjust the crunch with pedals in front of it. I don’t really understand the footswitch the way it is implemented as @el murdoque mentions, just seems a waste of a footswitch. I’ve personally always avoided that pedal because of the power requirements (I tend to use my amp’s DI, so phantom power wouldn’t work for me).Just to clarify:
I agree that the implementation of the AGS footswitch on the TH pedal is not ideal...and that Aguilar could have made it more useful.
I just don't agree with posts which present this great-sounding preamp as (almost) unuseable because of this "imperfection"...
I don’t think many people have called it unusable for that “issue”, just seems like a volume for the AGS channel would be an obvious/easy improvement/fix that could be implemented to make it more versatile (though it seems that’s not really how it’s intended to be used or they’d have added one). Take for example the Darkglass Ultra pedals where there is a Master Volume that affects the level all the time the pedal is engaged then a 2nd Level control that only affects the Drive channel. The Darkglass pedals also fail at this dual-channel arrangement to a degree (for me) though because of how non-transparent their drive tones are, to me Darkglass drives only work as “always on” for that reason.
I’ve yet to actually own a dirty preamp that successfully does the clean channel plus dirty channel thing the way I want to hear it, but I haven’t tried all that many dual-channel preamp pedals either- I guess the ideal way to do it is by using two identical channels with their own Gain controls (the Tech 21 Steve Harris pre did this pretty successfully, I just didn’t get along with its EQ or would have probably kept it). I have had a few drive pedals that do dual channels well, currently I’m always hyping up the Blackstone Mosfet for that purpose! That into a mostly clean preamp is a nice combo.