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Author Topic: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32  (Read 949 times)

Jerome Miller

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Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« on: December 03, 2020, 10:54:53 pm »

Hi all! I am new to this forum, but wanted to see if anyone has experienced these same issue I have. I am running a Soundcraft Si Impact board and a mini stagebox 32. Anytime something is plugged into a power outlet, the stagebox drops the signal for 1-2 seconds. I have even put the stagebox on a separate breaker, but I still have this drop out. I assume this is still a power issue. Does anyone have any thoughts? Thanks in advance!
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Doug Fowler

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #1 on: December 04, 2020, 04:30:43 pm »

Read the rules, fix your display name.
Thank you for your cooperation.
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Art Welter

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #2 on: December 09, 2020, 02:59:38 pm »

Anytime something is plugged into a power outlet, the stagebox drops the signal for 1-2 seconds. I have even put the stagebox on a separate breaker, but I still have this drop out.
Jerome,

What do you mean by "Anytime something is plugged into a power outlet"?
Any AC power outlet in the building, or a specific duplex or power strip?

Have you checked your AC source(s) for proper wiring and voltage?

Art

 
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BMurray

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #3 on: May 10, 2021, 02:59:03 pm »

I realize this is an old post.  I am seeing very similar thing with my gear:

- Soundcraft Si Impact
- mini stagebox 32

The problem is that all audio is lost for a brief 1 or 2 seconds.  (feels like an eternity.)

This does not happen all the time.  I've noticed it happen in a few different venues/setups.  I can setup my system at home, and all works fine.

- I'm noticing that the dropouts seem to happen at the same moment the band hits a powerful accent.  And even sometimes when DJ music is playing and there is a powerful "bass drop" moment.  (Makes me think it's something to do with momentary Amperage draw from the subs.  Or perhaps a vibration wiggling a loose connection.)

- I also notice that the dropouts tend to only happen at venues where my Volt meters are showing low 108-111 ish.  (should be 120ish here in the states)

- I also had the thought that maybe there is EM interference possibly at play here.  Sometimes (when I'm in a rush) I will end up with a coil/reel of electrical cable, and a coil/reel of digital snake, sitting right next to each other under my desk.  I didn't notice it until near the end of a gig, but I moved the coils away from each other, and didn't have any more dropouts for the remainder of the show.  (promising... but more experimenting needed)


I'm confident that my gear is in "working order" because this problem has only happened in a few venues/gigs.  I'm convinced that the problem is something with how my gear is setup, and/or the electrical supply I am using.

My working theory at the moment is that the digital snake is more vulnerable to EM radiation that I thought... and I should take more care to keep it away from power cables, especially coiled cables.
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Dave Garoutte

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #4 on: May 10, 2021, 03:34:11 pm »

I had a similar issue at a community outdoor event (not mine) with a UI24.
Every time the music got loud it would drop out.
Turns out the 300 FEET of extension cord the park supplied was dropping the voltage down to around 85 volts (measured) causing brown outs to the UI and the Nord on stage.
The UI would reset after a few seconds when the voltage went back up.
Ended up swapping for a smaller analog board and kept the volume down.
After I suggested they put in a 20 amp outlet near the stage, the next year they ran TWO 300 FOOT CORDS!
This is the perfect application for a UPS.
« Last Edit: May 10, 2021, 03:39:29 pm by Dave Garoutte »
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BMurray

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #5 on: May 10, 2021, 04:19:31 pm »

This is the perfect application for a UPS.

Oh, good call.   I do have UPS on my stage box, and on my desk...  But I'll make sure they are still working properly.  It's been quite awhile, the batteries may be getting old.
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Caleb Dueck

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #6 on: Yesterday at 01:18:10 am »

This is the perfect application for a Generator.

Fixed it for you.  :)
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Stephen Swaffer

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #7 on: Yesterday at 12:27:19 pm »

I had a similar issue at a community outdoor event (not mine) with a UI24.
Every time the music got loud it would drop out.
Turns out the 300 FEET of extension cord the park supplied was dropping the voltage down to around 85 volts (measured) causing brown outs to the UI and the Nord on stage.
The UI would reset after a few seconds when the voltage went back up.
Ended up swapping for a smaller analog board and kept the volume down.
After I suggested they put in a 20 amp outlet near the stage, the next year they ran TWO 300 FOOT CORDS!
This is the perfect application for a UPS.

If they used the ubiquitous 16 AWG orange cords, #16 wire has 4.89 ohms resistance per 1000 feet.

300 feet of extension cord = 600 feet of wire for math purposes.  4.89*.6K=2.934 ohms.  35 Volts/2.934 ohms=11.9 amps or about 1400 watts-but that is instataneous power-not your average power taking crest factor into account.

Two cords would get you up to 103 volts-assuming an even load.  Put power amps/speakers on one cord and everything else on the other might work.

I agree with Caleb-use an inverter genny and your issue goes away-along with the trip hazard of 300' of extension cord.
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Steve Swaffer

Dave Garoutte

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Re: Drop signal - Soundcraft Si Impact and a Mini Stagebox 32
« Reply #8 on: Yesterday at 12:52:50 pm »

If they used the ubiquitous 16 AWG orange cords, #16 wire has 4.89 ohms resistance per 1000 feet.

300 feet of extension cord = 600 feet of wire for math purposes.  4.89*.6K=2.934 ohms.  35 Volts/2.934 ohms=11.9 amps or about 1400 watts-but that is instataneous power-not your average power taking crest factor into account.

Two cords would get you up to 103 volts-assuming an even load.  Put power amps/speakers on one cord and everything else on the other might work.

I agree with Caleb-use an inverter genny and your issue goes away-along with the trip hazard of 300' of extension cord.

It was a loud 5-piece rock band.  3-SOS plus sub,  three monitors, two guitar amps, one keyboard and amp.
I measured the voltage during play, so calculations aside, I did see 85 volts.
I would have happily supplied a genny, but I was only supplying the stage up until the problem.
I have been pointing out all these issues for the several years I've been supplying the stage, but to no avail.
« Last Edit: Yesterday at 12:55:03 pm by Dave Garoutte »
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Mac Kerr

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« Reply #9 on: Yesterday at 01:56:44 pm »

Oh, good call.   I do have UPS on my stage box, and on my desk...  But I'll make sure they are still working properly.  It's been quite awhile, the batteries may be getting old.

Please go to your profile and change your name to your real full name as required by the posting rules.

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« Reply #9 on: Yesterday at 01:56:44 pm »


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