Looks like I lost track of this thread and forgot to come back with those resistor values. I'll put this on my list of things to do over the next week. I've done a lot of mods on the 200-series to make them more recording friendly. They were designed by Tascam to do a little of everything, but you can tweak them more with recording in mind rather than live sound. Glad the op-amp swap helped. More to come shortly.