Without knowing what kind of (RCA?) ICs you're using, point the arrows back to the preamp instead of toward the amp or subs. Leave the cheaters on the subs PCs and on the amp(s) PC(s). Do ground the preamp.
I'd still like to know what kind(s) of ICs you're using. Oh yeah, and make sure they cross any power cords at right angles, and don't run them right along the baseboard, they might be paralleling an AC line in the wall.
I'd still like to know what kind(s) of ICs you're using. Oh yeah, and make sure they cross any power cords at right angles, and don't run them right along the baseboard, they might be paralleling an AC line in the wall.