You are here

White noise from Yamaha HS8 monitors with UPS

All about the tools and techniques involved in capturing sound, in the studio or on location.

White noise from Yamaha HS8 monitors with UPS

Postby aviorrok » Mon Feb 19, 2018 8:06 pm

HI,
I bought a new UPS (Advice EX1200) and new monitors (Yamaha HS8) when the monitors connected to the UPS there is a low white noise from the monitors if I connect the monitors direct no white noise.
It's ok or I need to replace the UPS or the monitors?

Thanks!
aviorrok
Poster
Posts: 26
Joined: Mon Jan 22, 2018 11:13 am

Re: White noise from Yamaha HS8 monitors with UPS

Postby Hugh Robjohns » Mon Feb 19, 2018 8:39 pm

It sounds like your ups isn't producing sine-wave mains, and/or your active speakers are sensitive to noise on the mains supply... But it might be making sure of the safety earth continuity through the ups.

Which ups model is it?

H
User avatar
Hugh Robjohns
Moderator
Posts: 21943
Joined: Fri Jul 25, 2003 12:00 am
Location: Worcestershire, UK
Technical Editor, Sound On Sound

Re: White noise from Yamaha HS8 monitors with UPS

Postby aviorrok » Mon Feb 19, 2018 8:45 pm

Hugh Robjohns wrote:It sounds like your ups isn't producing sine-wave mains, and/or your active speakers are sensitive to noise on the mains supply... But it might be making sure of the safety earth continuity through the ups.

Which ups model is it?

H

Advice Excellent EX-1200
aviorrok
Poster
Posts: 26
Joined: Mon Jan 22, 2018 11:13 am

Re: White noise from Yamaha HS8 monitors with UPS

Postby Wonks » Mon Feb 19, 2018 11:37 pm

Not a lot on the web about it at all. Do you know if it is an always on-line device or does it only kick -in when power's lost?

It doesn't appear to be a particularly expensive unit, so unlikely to be an always on-line model or provide a true sinewave output when it is. In which case, it shouldn't produce any noise (except maybe RFI) with mains power available, but might cause noise when it's running on its batteries.

If you can find a data sheet for the unit online and link to that, then we might be able to tell you more.
User avatar
Wonks
Jedi Poster
Posts: 6392
Joined: Thu May 29, 2003 12:00 am
Location: Reading, UK
Now even grumpier than Ivan in his heyday.

Re: White noise from Yamaha HS8 monitors with UPS

Postby aviorrok » Tue Feb 20, 2018 12:21 am

Wonks wrote:Not a lot on the web about it at all. Do you know if it is an always on-line device or does it only kick -in when power's lost?

It doesn't appear to be a particularly expensive unit, so unlikely to be an always on-line model or provide a true sinewave output when it is. In which case, it shouldn't produce any noise (except maybe RFI) with mains power available, but might cause noise when it's running on its batteries.

If you can find a data sheet for the unit online and link to that, then we might be able to tell you more.

I think it’s always on-line, when the monitors volume is on Min the white noise gone.
Here’s the web of the UPS company

https://www.advice.co.il/en/new-exclusi ... excellent-מערכת-אל-פסק-detail
aviorrok
Poster
Posts: 26
Joined: Mon Jan 22, 2018 11:13 am


Who is online

Users browsing this forum: No registered users