I've got one channel of what's mostly a superfilter - switchable hi, band, low, and notch filter with CVQ - on my 77 custom (doesn't have the blend control). The other channel is the "traditional" eq with qvc. Also a lot of switches that let me put the filters in series or parallel. No idea how they crammed all that stuff in the small body of my long scale bass, but I'm so glad they did.