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Ground Loop Hum
Old 23rd February 2013
Gear interested

Thread Starter
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.
Old 23rd February 2013
Lives for gear
fireberd's Avatar
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.
Old 23rd February 2013
Gear interested

Thread Starter
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.
Old 23rd February 2013
Lives for gear
|-|'s Avatar
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.
Old 23rd February 2013
Ebtech is nice
Old 23rd February 2013
Lives for gear

I have Humx's for use on various offending guitar amp gear. Works like a charm
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