I'm working with someone today and he has a vocal track that is set to 0.0 db and I tell him to add a hi-pass filter to cut out some background crap below 80hz. So bam, do it and all of a sudden the track is clipping by .03 db. Bypass the EQ, no clipping. Turn off the hi-pass, no clipping. So I try it on tonight on one of my projects - set the channel level to to peak at 0.0 db, set hi-pass filter at around 80hz, and BAM - clipping at +2.4 db. Has this gain boost always been going on and I'm the last one to notice? Basic logic (pardon the pun) would state if you reduce frequencies, output level should drop.... Or so I always thought.