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Ground Loop Hum
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Slim Floyd
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#1
23rd February 2013
Old 23rd February 2013
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Ground Loop Hum

I am using a presonus audiobox usb going out to 2 yamaha hs50m monitors. When used on a laptop, with or without the power supply hooked up, i get no ground loop hum. When used on my desktop, i do have ground loop hum. I do not have the option of isolating the circuit because i live in a dorm. Would purhcasing an ebtech hum-x and plugging the desktop into it remove this ground loop hum or is the problem internal within the desktop? My desktop is much more powerful than my laptop so I dont have the option of using the laptop.
#2
23rd February 2013
Old 23rd February 2013
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Can't you use the "ground lifter" adapter for the AC Power? Use it on the speaker's power supply first and see if that fixes it. I would prefer the speakers over using the ground lifter adapter on the PC.

An Ebtec may do the job, but the ground lifters are cheaper if they work.
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Slim Floyd
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#3
23rd February 2013
Old 23rd February 2013
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excellent, thanks for the advice. the reason i was thinking i needed to try it on the PC itself is because the speakers had no hum when the interface was powered by my laptop.
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#4
23rd February 2013
Old 23rd February 2013
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The ebtech will be the safest and 'legal' route in case your studio burns down. A cheater plug is NOT a proper means of handling electricity and your insurance company will have a field day if they find it.

Just spend the $ and get the ebtech.
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23rd February 2013
Old 23rd February 2013
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Ebtech is nice
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