geniuses help- pre into pre--gonna blow up?

unhappy with 2 channel perf. of mac home theater ( mx 135 pre/pro into 7 ch mx 207 amp but i only use 5 channels of the 207 for center and surround and have front L and R main speakers attached to 2 mac 501 monoblocks that also come out of the 135 pre/pro)-- so i got an arc ph 5 phonostage and my vinyl world of 50's jazz albums improved so much that i just bought here on agon an arc ref 3 pre as well--the tv is on 6 hours/ day so i don't want the tubes in the ph5 and arc 3 to be on all day-only want the ph5 phonostage and ref 3 amp to be on when playing vinyl or cd-how do i hook this up w/o blowing up everything?--can i go tt to ph5 to ref 3 to mac 135? (but that plugs one pre into a second pre- is that a problem?)(don't really understand home theater bypass-what gets plugged into what port?if you can do this with home theater bypass does that mean i'm not getting the benefit of the tubes in the ref 3?) i can't pull the main speakers off the mx 135 and put onto the ref3 as they are part of the tv/home theater which is on all day---you guys are way smart- your help and suggestions are most needed and welcome-thanks in advance!