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?
It doesn't sound normal to me, at least I have never tried it. The bigger question is "do you often listen this way". If not I wouldn't worry about it.
Yes, it is quite normal. If you cannot hear it unless you are that close, forget about it. On big amps with modern transformers toroidal or iron core, you get humm. Many manufacturers cover transformers to reduce audible hum or soft mount them to do the same. Top quality transformers do not hum.
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