Re: STK-S6 vs STK-S9b?
It's been a long time since I used the SSL-6, which the Custom Stack Plus is the noiseless version of, but I remember it having a frequency spike that I just didn't like. I don't know if the STK-S6 is that way or not. I do have the STK-S9b paired up with a couple of STK-S4's and I am very happy with the setup. It's hot, but it still works well with the lower output STK-S4's. It sure makes for a diverse Strat.
I wired mine with a 500K volume, 250K master tone and no-load blend where I can blend the neck pickup in no matter where the 5-way selector is so I can get neck+bridge. It works out really well. Can't remember if I used 250K or 500K for the blend pot. I want to say 250K as I have more of those laying around. The tone pot is also push/pull. I originally had a 'Lil Screamin' Demon in this guitar and had it wired to split and disengage the lower coil in the stacks but when I changed it out I just left the stacks set up that way and added the 9b to do the same. Quite honestly, I don't hear much of an audible difference between single-coil mode and noiseless mode.