Adcom GFA-565 Slight Thump


Hello,

I recently acquired a pair of Adcom GFA-565 monoblock amplifiers which I'm using to power my Kef XQ5's. They sound really great, but there is a slight bump from the speakers (midrange) when I turn them on. Is this normal? I've read about the standard repair for a loud thump (I assume from the woofers), but I don't think I have this problem yet. Think it's time for me to perform the repair? Can I test this with a multimeter?

Thanks,
Chris
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