My sub has the following on the back: X-OVER from 0-240 PHASE either 0 or 180 switch INTERNAL X-OVER or DIRECT switch To my understanding i should let my Kardon 325 do the x-over so the actual "X-OVER" knob is useless then. Doing this i set the "INTERNAL X-OVER or DIRECT" switch to DIRECT? Then i need to go into my receiver and put the SUB on GLOBAL and set the HZ to 80HZ? ( some people have told me 60HZ, some 80HZ and one guy said 240...so confusing!!!) Then what do i put the PHASE switch to? Finally....i set the volume on the SUB all the way down and use the receiver to turn the volume up? I set it to 80DB with a reader and Video essentials? Thanks in advance for any suggestions and letting me know if the stuff above is right or wrong. I'm a complere newbie and appreciate ANY help.