Originally posted by Amelius:
a separate 1U EQ module will not help equalize separatly at least four channels, will it?
Nope - a separate EQ is needed for each source. Korg made a 1U rack EQ years ago that was intended for 4 track recording and had 4 mono, 5 band EQ's and a stereo 7 band eq. Cool piece, but WAY discontinued.
You can get more mixer for the money in a table top model.