2. misc-audio
  3. 155436-100034

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
 
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
lowrider57's avatar
lowrider57
5,418 posts
 
If not DC offset, it could be that the transformer is not mounted solidly in the chassis. There are members here who know how to correct this.
Or it's simply a transformer that hums.

uberwaltz's avatar
uberwaltz
13,381 posts
 
From various contributions from members who also actually own this model it does appear to just be the fact that it is a hummer, period.
Now you may be able to reduce that with damping either external or internal but if it truly bothers one it might be time to look elsewhere.

It does not appear to be DC offset at this stage.
arvincastro's avatar
arvincastro OP
121 posts
 
@oldhvymec  

While I would love to see what you find out, I do hope you know what you’re doing...please stay safe!

Arvin
arvincastro's avatar
arvincastro OP
121 posts
 
@uberwaltz  

Yes, the more I researched around other forums (including at Tripp-Lite) the more I understand this to be a unit that has a hum...some louder than others. 
The other thing is that I did read about how some users/techs eliminate such a hum by using rubber grommets to isolate the transformer from the chassis...similar to what @lowrider57 suggested. 
All in all, I can live with it...just wanted to know if an easy fix was possible. 
Again, Thanks everyone for your input!

Arvin
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