2. amps-preamps
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What is DC offset on the AC power line?

I realize this question may be more appropriate in the miscellaneous section so please accept my apologies in advance. This may be somewhat amp related though, as in "don't use it with an amp".  

Can someone comment as to the pros/cons of a  DC offset suppression device, such as Emotiva CMX-2.

https://emotiva.com/products/accessories/cmx-2

I haven't seen this feature in other power strips and/or surge suppressors.

Thanks.


128x128gdhal

Showing 2 responses by wolf_garcia

wolf_garcia
6,631 posts
 
Both my SS (for remote speakers) and tube main amp are plugged into a PS Audio Humbuster III…the tube amp wasn't humming but there was an extra outlet there so I figured it couldn't hurt…so…the SS amp had that pesky transformer hum sometimes and now it doesn't, both amps are dead quiet. The end.
wolf_garcia
6,631 posts
 
My SS amp stopped humming (note this is a physical transformer hum not audible in the speakers) on its own even before the Humbuster was added…DC gremlins taking a break? Some amp designer do put DC filtering of some sort in their stuff as my addled brain seems to remember reading about that in reviews…but hey…they certainly all should do some damn thing. I use a couple of "after market" power supplies for my DAC and phono pre that claim to have that feature.
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