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Reducing Humming Sound

Hello all!

I am using a Tripp-Lite LCR2400 AC line conditioner in my system.  I am very happy with it and the peace of mind it offers me with regards to not only protecting my equipment, but insuring the power I'm getting is clean and stable.

This unit is known to have an audible hum to it...it's not very loud, but it can be heard faintly in a quiet room. When playing music, the hum is not noticeable at all.

If I were to attempt to reduce this hum, would opening the unit up and affixing sound deadening material (like Dynamat) to the interior of the case/chasis/cover be a good solution?  Normally, I would go ahead and give this a try, but since there is such a high level of electricity being handled by this unit, I don't want to do anything that would be dangerous once I plug it in and turn it back on.

Thanks for any feedback,

Arvin
arvincastro
oldhvymec
5,101 posts
 
I have 3 2400 tripp lite, they all make noise. Yup, open one up you can get bit pretty good.  I was thinking an enclosures outside the room for me.

I haven't quite figured out what to do yet either. I do notice it.  Those thing are a bit noisy though.. I wonder if a variac would quiet them down. You know a volt or two on the input side, up or down.? Just a thought..
Second, mine you can push down pretty hard on the case and they do quiet down a bit..Bag of lead shot, stand on it, tough to get in a listening position with one foot on each conditioner, what about the third one, I don't want to go there..LOL

Regards
arvincastro's avatar
arvincastro OP
121 posts
 
Thanks all for your suggestions!

I had always been a little bit leary about opening up this unit due to well, the possibility of death, but thought there might be an instance of someone who actually did what is was suggesting. I’m glad I asked before jumping in!

I will try dampening, externally, the unit in some way. Like I said, the hum isn’t particularly loud, so if I can apply some weight/pressure effectively, it should help a lot. I will also look at that Emotiva unit...it’s not that expensive, very doable. 
Thanks again and hope you are all doing well!

Arvin
mike_in_nc
1,166 posts
 
P.S. I had a TrippLite unit about 15 years ago. I got rid of it because it hummed. Looks like nothing has changed.
minorl
1,018 posts
 
Coils and especially large transformers will hum.  Some equipment is damped and isolated much better than others.  This is why well designed, well made transformers are extremely expensive.

I have had several conditioners that hummed loudly and in every case, it was the transformers.  Had to get rid of them.

There are power conditioners in the market that are very quiet and work quite nicely.

enjoy
oldhvymec
5,101 posts
 
One thing I have noticed, the hum in mine stays the same, no matter what's plugged into it, or if nothing at all is plugged in. THEY HUM..
Maybe the DC offset thing millercarbon offered up is an option.. I'd like to quiet mine down too. I use to have Topaz, Nothing like these..

I'll open one up and look, just need to be careful and discharge the caps a FEW times. I'll take some pics...

Regards
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