I posted on this but it’s not showing up? So I apologize if it shows up later.. It basically said the guys up above hit the nail on the head with their replies..but I struggled with the same thing a few months back. I ended up setting the height to where the single coil with the sustainiac switched off sounds best then messing with the drive “knob” on the circuit board to find a happy medium. I emailed Maniac Music, the manufacturers of the sustainiac, to find out their recommended height settings and they are extremely close. Almost too close..the strings barely have room to vibrate freely. So then I emailed Syn’s tech Kevin to see if he had any measurements for how he sets up Syns sustainiac guitar..he basically said he does it by ear also.
Alan at Maniac Music’s email:
“You should adjust BOTH the Sustainiac driver and also the bridge pickup
height as follows for good, strong Sustainiac performance:
Little e-string distance: 1/16 inch (1.5mm)
Big E-string distance: 1/8 to 3/16 inch (3-4mm)”
Kevin Syn’s tech email:
“Howdy Jake. I’m sorry to report that I don’t have any actual measurements to recommend. I set the pickup height by ear for each guitar, some guitars are set up for certain songs with a slightly higher or lower action depending on the style of the tune so the pickups need to be adjusted accordingly. Once you have a balanced sound from the sustainiac as a pickup you can adjust the ‘drive’ internally. The sustainiac function is different on each guitar as the effect itself needs to react differently for certain parts of solos. Lots of slight variations on the setups, that’s why we carry so many instruments on tour. Hope this helps.”
The sustainiac does work better with it close..but to me, Kevin had the best advice