Hooked up my bang olufsen beogram 4004 to my sound craftsman eq rp2215-r..... I get some feedback.. My McIntosh ma230 has a ph

bang olufsen beogram 4004 -> turntable
sound craftsman eq rp2215-r -> equalizer
McIntosh ma230-> amplifier

How these units are connected? Does your turntable has RIAA preamp?
 
You can't hook the TT to the EQ directly. Connect the TT to the phono input on the MA-230.
Connect the EQ in the tape monitor loop (record out to EQ in, EQ out to play). When you want the EQ just engage the tape monitor. This way it will work on any source not just phono.