OK, I've managed to clean up audio from the 1st take of an interview in Soundbooth. I saved is as a .wav file, and it sounds great in Premiere.

I repeat the procedure for the subsequent takes, but they all sound distorted in Premiere. Same EQ in the noise panel as the first take.

Any ideas?

No problem ... I figured it out. I was saving the EQ'd files as 8 bit instead of 16 bit. The default position was 8 bit and was clicking "OK" without noticing it ..