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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
lowrider57's avatar
lowrider57
5,393 posts
 
Try it or the Emotiva and if you still have hum, then return the amp under warranty. FYI, in the past, Rogue has installed some bad toroidal transformers in their amps.
ebm
9,311 posts
 
Sounds like a great product however i have no hum in my system.

drrnc2 OP
29 posts
 
Thanks all for your responses.  I have learned some things.  Right now, I plan to take the amp to the dealer and see if it hums in his set up.  Interestingly, I took the ST 100 out of my system and put an ST 90 (the model previous to the ST 100) in its place---and NO HUM.  Suggests to me its not dirty power, but more likely a bad transformer.  I assume the dealer will hear the hum also and then it will be off to the factory for repair.

Regards,  Rich
drrnc2 OP
29 posts
 
Oops!!  Some hum at the dealer, but less than at my place.  He is a guy whose knowledge/opinions on electronics I respect,  and he is honest (therefore I trust him), and he feels the hum he heard was "typical" and not a sign of a 'bad' transformer.  He suggested it not be sent back to the manufacturer, but put back in the system and see what happens. I hope I can get used to the hum (not heard when music playing) and if not, will give a try to the Humdinger or Emotiva unit.  Anybody have any opinion re: effect of Humdinger OTHER than reducing hum, i.e., its impact on music reproduction?  I suppose AVA and Emotiva would say 'none', but wonder if anyone has experienced anything negative from the Humdinger....

Regards,  Rich
gdhal's avatar
gdhal
1,641 posts
 
I use an Emotiva CMX-2. I have no hum what-so-ever, although I did not have hum to begin with. There is no harm in using this as it does not limit current in any practical sense. Relatively inexpensive and Emotiva regularly runs 15% off sales to boot.
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