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Thread: Exposure Vii pre-amp hum on mc input

  1. #1
    Join Date: Feb 2012

    Location: ireland

    Posts: 65
    I'm ian.

    Default Exposure Vii pre-amp hum on mc input

    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

    thanks

  2. #2
    Join Date: Apr 2013

    Location: Left AOS

    Posts: 456
    I'm Gone.

    Default

    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

  3. #3
    Join Date: Jul 2012

    Location: East Sussex

    Posts: 118
    I'm John.

    Default

    I would check the tonearm grounding wire first. Is your tonearm grounding wire connected to the ground / earth terminal on the preamp?

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