Slight hum in my amp. Is this normal?

Watching this post with interest. I have a Prima Luna integrated making hum. If you are successful getting your fixed, I'll send mine in (under warranty) to see if it is fixable.

Wow, I thought it was bad hearing hum from my Klipsch speakers from 12 feet. I'd be pissed if I could hear the actual transformers! I have an Emotive  CMX-2 ($127 w/tax) coming tomorrow. I'll report on its efficacy.

Received the Emotiva  CMX-2 which made no difference in suppressing the 60 Hz hum (clearly heard thru my KEF Q1 monitors 12 inches away).
No source was connected, hum did not vary with volume and mute button made no difference. I've given up hope of using this integrated with my Klipsch LaScalla IIs. I'll be content using my BAT VK-300se 150 wpc integrated which is dead silent. Sometimes you get what you pay for...

It's a beautiful unit and extremely well made (big, beefy power cord). I don't need it so may try to return. Thanks for the heads-up!

The hum in my Prima Luna Prologue Premium integrated sounds like a constant 60hz. It is in both channels equally, Its amplitude is not affected by the volume control and muting the amp does not make it go away. My guess is that it's coming from the rectification circuit or some shielding did not get installed during manufacture. I bought it to power some 105db speakers. It is useless in this application. 

I’ve worked with the national distributer trying most of what you suggest (cheater plugs, with source, without source etc.). The only thing I haven’t done is unplug everything in my house. I’d bet green money that the integrated is the source of the hum. My Balanced Audio Technology integrated is silent using the same electrical circuit. The noisy amp is under warranty. It works well with normal speakers so I may try to trade it in for some quite tubes or the new Pass Labs 25 watt SS amp. Thanks for your concern and advice.

@jea48 - It sounds most like your last link. Does the PL integrated have separate tubes per channel? Or could a single tube cause hum in both channels?

No, my system is not connected to a cable box. I've given up wanting to use this amp with my Klipsch. Will trade in for a Pass Labs XA25 SS amp ( I tried selling here on A'Gon but couldn't get a decent price).

Sounds encouraging! Think I'll roll the dice and see if Prima Luna can fix the hum in my unit.