hi i got a preamp for my record player cause my receiver doesn't have a phono input which means no pre amplification right? So when i connect it there is a hum more noticibly through the subwoofer. I tried grounding it to just about everything. I'm stuck now and out of ideas, if anyone can help me I would greatly appriciate it.


if this helps the preamp is a mcm 40-630






thanx