Ampliffier layout, Hum, EMI

This is my Barbaric amp amplifier. Thanks to the members of this site I have amplification that perfectly suits my needs and sounds better to me than anything that I have tried to use in my system. I know very little about this and am looking forward to learning. I currently have 60Hz hum in this system. It is similar to the sound of passive pickups in a guitar while idle. It is not extremely loud. At this point, I am so pleased with the sound of this setup that I'd rather this amp with the hum than any of my others but would like to learn about EMI and how to get around it and avoid it.
 

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    Barbaric amp.jpg
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