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Anyone with experience with the effectiveness of the AVA HUMDINGER?

Just got a new amp -- Rogue ST 100 -- and have transformer hum.  First time ever in my system.  The factory says something about DC voltage on the incoming AC line.  My son the electrician says he has never heard of that happening.  He says we switched from Edison to Tesla a few years back. 

Anyway, I have tried all kinds of things to see if I could eliminate/reduce it  to no avail:  different circuits, disconnect everything else from the system (other than speakers)  disconnected the powered woofers in my speakers and the subwoofer, tightened the bolts holding the transformer down,  etc. etc.

So maybe the Humdinger is worth a try??   Some other way to handle it (other than a new transformer which the factory says it will do if its really the transformer)?.  Anyone with experience with any other solution?  Thanks for your help..  Regards,  Rich
drrnc2
joeylawn36111
574 posts
 
If you have a voltmeter, you can measure (carefully, of course) any DC Voltage on the AC line - it should read near zero when the meter is set on DCV when plugged into a live 120VAC outlet.
drrnc2 OP
29 posts
 
Yep, did that and got the zero.

 I still hear the hum and its a hassle.  So I will try the Humdinger or the
CMX-2.
drrnc2 OP
29 posts
 
A follow up note:  Got the Emotiva CMX2--while it seemed to improve the sound noticeably, the hum persists.  I have the cover off of the Rogue for increased ventilation/circulation, so hear the hum clearly at the listening position.  What to do???

I am emailing back and forth with the Emotiva folks and they will be making a Dx and hopefully Rx next.  
helomech
1,485 posts
 
Did you ever manage to solve this hum issue?
twoleftears's avatar
twoleftears
5,313 posts
 
I tried the Humdinger to eliminate Rogue transformer hum, and it didn't do a thing.  The unit is extremely well made, and I have no doubt it does exactly what they say it does, only what it was eliminating was not causing my hum.  AVA were very easy working with, both ordering and returning the unit for full refund.
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