I noticed when changing from 2-channel to 4-channel EQ I could not get the same sound. After playing with it for a bit I realized that the 4-channel EQ uses the same Q values as the 2-channel. This is wrong, because the 4-channel has only half the bands and therefore the Q should be half as well. This would allow each pass band to cover the frequency range up to the next pass band.

This could be fudged in Hijack to divide the Q for each band in half when in 4-channel mode. Or it is possible in the player to force a Q, but it resets whenever the gain is changed.

I thought I would mention this in case anyone notices strange behavior like I have.