Questions & Answers

Connection and noise problems with Firestudio Mobile

0 votes
asked Mar 28, 2017 in FireStudio Series by merdozhatesu (150 points)

Hi, sorry to disturb you, I've found a similar question in the forum, but with no real answer, so I'll try to make my own question:

I use a Presonus Firestudio Mobile on a computer with Asus Z170 Pro Gaming Motherboard, Intel i7-6700 Processor, 32 (16x2) GB Corsair Vengeance LPX RAM, Corsair AX860 Power supply, Windows 10 home and updated presonus drivers (1.7.4).

I experience this strange problem: if I connect the firestudio mobile to the computer with the 6 pin firewire, it is very noisy (digital noise it seems), and it turns off when the computer is turned off (if I don't use his power supply); if I connect it with 4 pin firewire, it is less noisy, it need its power supply (obviously), but it disconnect when I push some light switches nearby (in other rooms too, anyway); I mean, when I turn on and off some lights in the house, the audio interface disconnect: no audio, and red-blue light blinking (sometimes, but it's rare, no audio but no blinking too, it stays blue but the audio goes away).

After some tries, I think the power supply could play a big role in this, but I don't know what to do to solve it (consider that with the 6 pin connection it doesn't have the disconnection problem, but it's really really noisy).

A last thing: I altready tried to connect all, I mean really all (computer, studio monitors, audio interface etc.) to an external "power provider" (sorry, I don't know the right word, a frind gave it too me to try this way); I mean, nothing was connected to the house's electrical system... but the problem persisted! It was only less immediate: after some light switch clicks it disconnected, even if all was connected to an external power (audio interface included).

Please help me with this, with the 6pin noise problem and/or with the 4pin/power supply disconnection problem.

Thanks in advance.


1 Answer

0 votes
answered Jun 26, 2017 by AlexTinsley (907,060 points)
Best answer
You may have some grounding issues in your home electrical wiring which are interfering with the ground in your computer which is indirectly affecting your audio interface.

Consider looking into a Hum Elimnator from Ebtech: and/or investing in a UPS from APC (available from computer and office supply stores) that gives you a transformer isolated output that would separate the electrical ground from whatever is in your wall.