If you are getting alot of extra bass on the vocal ..move the vocalist away from the mic ..say about six to 12 inches depending on the power of the vocalist. Mics have a proximity (spelling) effect that really kicks up the bass if the singer is right on the mic...and as stated above use your rolloff ... I have rolled off low end on some vocalists up to 200hz (mostly live recordings) with out a serious hit to quality. Put a DIGI 1 band eq on the playback channel and select the highpass setting and adjust to taste. bb