When I put my ear (about 2 inches from the top)to my integrated amplifier, I can hear a faint hum from both the transformers. Can't hear anything when I move my ear away from the amp. Is this normal?
I would not worry about hum that is audible only two inches from the top of an amp. Virtually any toroidal transformer, even of the best quality, will buzz to some degree if the DC level on the AC power line is high enough.
I made a DC blocker as a favor to an Audiogon member a while back. There are a could of circuits floating around the Internet. Its easy enough for anyone with decent DIY skills to accomplish, just remember you're working with electricity.
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