View Full Version : Exposure Vii pre-amp hum on mc input

08-08-2013, 12:41
Hi, when selecting mc on this pre-amp there is a low frequency hum coming from speakers. When selecting other inputs there is no hum, what could it be?

I'm using an ortofon mc25e cartridge and ar eb101 turntable


Andrew B
08-08-2013, 13:43
My first thoughts are "what's it sitting beside?" MC stages sometimes pick up hum like velvet attracts fluff. I had a similar problem when siting a DAC near my preamp

13-08-2013, 10:04
I would check the tonearm grounding wire first. Is your tonearm grounding wire connected to the ground / earth terminal on the preamp?