I know this is a pretty old thread but I just came across it and can offer a solution for EQ'ing LEFT/RIGHT separately. Using the parallel processing capability of Audio Hijack Pro you can split the input and pass it through two 4FX Balance plug-ins, one set full LEFT and the other set full RIGHT. You then feed those to a pair of AUParametricEQ plug-ins, and finally send those outputs back into a signal plug-in which will combine the signal paths again. The final plug-in can be bypassed so it doesn't affect the output since it's just being used as a combiner at this point. Attached is a snapshot of what it looks like in AHP. Note that the VU meters on both the front and backend are bypassed.
Ken
