Pip
Active Member
Hey all, I pop in here from time to time and I'm always glad to see this great community still lives on.
I recently implemented 3x UPS systems at front of house, and last night during a rehearsal I was trying to track down why some of my wireless mics had a bunch of disgusting noise. Eventually I kinda recognized the feel of what I was hearing, as it reminded me of the fan noise from the UPSes. So, I killed my FOH power as a test... Lo, the mics became much cleaner.
I'm wondering if anyone else has experienced power noise issues with UPSes, and what they did to solve it.
The system is powered by a 400A company switch with isolated ground. My PD has powercon outputs which power the monitor console and the RF rack, and a 50A Hubbel for the monitor drive rack. It also has 6x 30A twistlock outputs for lunchboxes on stage. When we got the UPSes, I ran a 200' 30A cable to FOH to power the UPSes off of the same PD. The cable and lunchbox were built by an in-house electrician guy who works at our other venue. Before that FOH was powered by the wall power in the cockpit on the same audio ISO.
Would love to see if anyone has any ideas here. Part of the issue was high preamp gain, I solved it for this show with slightly lower gain and gates on the affected channels. So I have a reasonable workaround for the show tonight. However, I'm quite interested in returning to my squeaky clean RF lines as is typical. For fun, I did a scan and found I had degraded backup frequencies but primaries were fine. I deployed a new set of frequencies anyway. Unsurprisingly, this didn't solve the problem although it's interesting to note that one of the channels which was clean picked up some noise after the freq change... I have 8 channels of Axient with Showlink AP, so I'm super flexible with frequency management.
Thanks in advance for any thoughts of solutions!
Warm regards,
Phillip
I recently implemented 3x UPS systems at front of house, and last night during a rehearsal I was trying to track down why some of my wireless mics had a bunch of disgusting noise. Eventually I kinda recognized the feel of what I was hearing, as it reminded me of the fan noise from the UPSes. So, I killed my FOH power as a test... Lo, the mics became much cleaner.
I'm wondering if anyone else has experienced power noise issues with UPSes, and what they did to solve it.
The system is powered by a 400A company switch with isolated ground. My PD has powercon outputs which power the monitor console and the RF rack, and a 50A Hubbel for the monitor drive rack. It also has 6x 30A twistlock outputs for lunchboxes on stage. When we got the UPSes, I ran a 200' 30A cable to FOH to power the UPSes off of the same PD. The cable and lunchbox were built by an in-house electrician guy who works at our other venue. Before that FOH was powered by the wall power in the cockpit on the same audio ISO.
Would love to see if anyone has any ideas here. Part of the issue was high preamp gain, I solved it for this show with slightly lower gain and gates on the affected channels. So I have a reasonable workaround for the show tonight. However, I'm quite interested in returning to my squeaky clean RF lines as is typical. For fun, I did a scan and found I had degraded backup frequencies but primaries were fine. I deployed a new set of frequencies anyway. Unsurprisingly, this didn't solve the problem although it's interesting to note that one of the channels which was clean picked up some noise after the freq change... I have 8 channels of Axient with Showlink AP, so I'm super flexible with frequency management.
Thanks in advance for any thoughts of solutions!
Warm regards,
Phillip