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Odd problem
https://mail.karaokescene.net/forums/viewtopic.php?f=1&t=9802		 Page 1 of 3
Author:  Babs [ Fri May 11, 2007 11:42 am ]
Post subject:  Odd problem
Hi guys ! I need your infinite wisdom. :hug:

My problem starts with the first vocals of the night. I start speaking over the mic to welcome people to karaoke and the speakers cut in and out with a bit of a static sound. It happens through both mics even if I switch channels. It happens through all 3 speakers. (2mains and a monitor) When the first song starts it happens only a bit to the vocals and NOT THE MUSIC. (I use a mixer amp which is only at the most 2 years old.)
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Now this only happens to the first song maybe the beginning of the second then stops. I never hear a problem the rest of the night. I have tried to eliminate things one at a time. All cables, connections, players and mics okay.
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I had a suspision it could be my monitor because at one time it was acting up, BUT NOW it was happening through all 3 speakers.
I unplugged the monitor wed. night  for the first 2 songs. Then I pugged it back in. THE PROBLEM WAS NO WHERE TO BE SEEN THE WHOLE NIGHT. All speakers worked fine.
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Could it be my monitor is having problems and effecting the main speakers?
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It is so hard to fix the problem when you do not know the source of it. I am going to unplug the monitor for the first song again tonight and see what happens. My speakers are all only a few years old, but I know a beer was spilled on the the floor monitor about a yr ago.
Author:  karyoker [ Fri May 11, 2007 12:08 pm ]
Post subject:  Re: Odd problem
If I remember right you have a 808 and would willing to bet you are using bwireless mics...The 808 has a problem with wireless mics and ive seen 2 or 3 that way with static or cutouts. The only thing I could figure out the sensitivity was too high on the receiver and over drivng the preamp. Try turning that dowm a wee bit..
Author:  Babs [ Fri May 11, 2007 12:12 pm ]
Post subject:  Re: Odd problem
Nope -
Using wired mics
I beginning to think I have a ghost in my system.
Thank you for trying to help - do you have any other ideas?  :hug:
Or maybe something I should try to figure out what is causing the problem?
Author:  karyoker [ Fri May 11, 2007 12:22 pm ]
Post subject:  Re: Odd problem
Something like that could be hard to find Try stressing the mic connections on both ends If it occurs at the start it is possible that it is static when you walk across the carpet and grab the mic for the first time.. Touch the 808 on a screw or the heat sink and see if you get a discharge..
Author:  exweedfarmer [ Sat May 12, 2007 7:43 am ]
Post subject:  Re: Odd problem
Make sure that everything is grounded including the electrical outlet that you are plugging into.  Might not help but it couldn't hurt.
Author:  Babs [ Mon May 14, 2007 10:51 am ]
Post subject:  Re: Odd problem
Thank you for the suggestions.

I am grounded, but I'll make sure to double check it all.

I'm still thinking it is the montor causing the problem.

This is my amp http://www.mackie.com/products/808m/index.html and I am using passive JBL speakers for mains and monitor. Do any of you know if my monitor is having this problem why it would be effecting the mains. When I unplug my monitor the mains are fine, but when I plug the monitor back in they all are effected.
Author:  exweedfarmer [ Mon May 14, 2007 11:04 am ]
Post subject:  Re: Odd problem
What is the monitor plugged into?  Powered mixer?  Its own power amp?  One of the mains?  You're right.  It's an odd problem.
Author:  karyoker [ Mon May 14, 2007 11:23 am ]
Post subject:  Re: Odd problem
The monitor and main amps the only thing common betweem is the power supply and the finals and voltage regulators share the heat sink and  are the same and it would be almost impossible to feed distortion from a speaker to a different amp Try running the mains off the monitor amp and the monitor off the main amp.. What is the wattage on your jbl's ?  and monitor

What are you using for speaker wire and how are you hooking them up?
Author:  Babs [ Mon May 14, 2007 11:32 am ]
Post subject:  Re: Odd problem
I use the powered mixer I gave the link to. These are my speakers http://www.musiciansfriend.com/product/JBL-Eon-1500-Passive-Speaker?sku=600226

I have the monitor plugged to the monitor input and the mains plugged into the main input. Normal stuff. No seperate power amp. I use fairly new speaker cables for connections - the cables are definitely not the problem. That is the first thing I checked. What do ya think?
Author:  karyoker [ Mon May 14, 2007 11:38 am ]
Post subject:  Re: Odd problem
Dont know Hon its got be baffled not being there and actually checking things.. Use the process of elimination by the above suggestion and even borrowing another speaker and hook it up to the monitor amp.
Author:  Babs [ Mon May 14, 2007 11:43 am ]
Post subject:  Re: Odd problem
OOOO I like that idea of trying another speaker in it's place to see what happens. I'll keep you posted. Your the goods !
Author:  karyoker [ Mon May 14, 2007 11:52 am ]
Post subject:  Re: Odd problem
And something alot of people dont think of.. My bud borrowed my jbl eon 12 for a monitor We just hooked it up to line out...
Author:  Lonman [ Mon May 14, 2007 11:57 am ]
Post subject:  Re: Odd problem
karyoker @ Mon May 14, 2007 11:52 am wrote:
And something alot of people dont think of.. My bud borrowed my jbl eon 12 for a monitor We just hooked it up to line out...


JBL EON 12?  Do you mean 10?  Hooking into the line out also must mean it's a powered speaker, Babs speakers are the passive versions.
Author:  Lonman [ Mon May 14, 2007 11:58 am ]
Post subject:  Re: Odd problem
Babs @ Mon May 14, 2007 11:32 am wrote:
I use the powered mixer I gave the link to. These are my speakers http://www.musiciansfriend.com/product/JBL-Eon-1500-Passive-Speaker?sku=600226

I have the monitor plugged to the monitor input and the mains plugged into the main input. Normal stuff. No seperate power amp. I use fairly new speaker cables for connections - the cables are definitely not the problem. That is the first thing I checked. What do ya think?


Do you use the same speaker for the monitor every time?  If so, try switching one of the mains & the monitor speaker to see if the problem shifts position.
Author:  Babs [ Mon May 14, 2007 8:36 pm ]
Post subject:  Re: Odd problem
Lonman @ Mon May 14, 2007 1:58 pm wrote:
Babs @ Mon May 14, 2007 11:32 am wrote:
I use the powered mixer I gave the link to. These are my speakers http://www.musiciansfriend.com/product/JBL-Eon-1500-Passive-Speaker?sku=600226

I have the monitor plugged to the monitor input and the mains plugged into the main input. Normal stuff. No seperate power amp. I use fairly new speaker cables for connections - the cables are definitely not the problem. That is the first thing I checked. What do ya think?


Do you use the same speaker for the monitor every time?  If so, try switching one of the mains & the monitor speaker to see if the problem shifts position.


It is funny you mentioned that. I was going to try that also. I'll go play around with it on Wednesday night before work and see what happens. Thank you
Author:  Steven Kaplan [ Mon May 14, 2007 9:43 pm ]
Post subject:  Re: Odd problem
I wonder if it could've been a poor connection or plug, cable, outlet box at the power source.  Loose plug, poor connection in wall socket, something that caused you to lose juice just based on positioning of cord, or plug, maybe a dirty main pot or fader position, was there poppin too ?  That could be ground... Did you notice if your pilot lights also cut in and out on your amp/mixer when this happened, this would of course mean a connection at the power source, or perhaps ground problem causing amp to go into protection mode ?  Can you determine if it was an intermittent cutting out at a power source ?  


I've had dirty contact points in potentiometers, cause crackling cutting out that I thought was a bad jack, or cable.   This has happened to a few guitars of mine,  and although I thought it was my cable or a bad jack (into the guitar or amp, and I was about to replace the 1/4 inch jack on the guitar), the tech told me, that wasn't likely the problem,  he had to open the guitar and spray the potentiometers with chemtronics tuner degreaser, to clean the contacts which were causing total cutting out, and cracking... dirty pots, or contact points, sliders, etc...
Author:  exweedfarmer [ Mon May 14, 2007 9:44 pm ]
Post subject:  Re: Odd problem
This a weird one and I just love a puzzle.  You say it doesn't affect the music just the mics.  What sort of mixer amp do you have?  How is the music connected?  
Tape-in through RCA jacks or into chanels via quarter inch or XLR?  Does the problem occur even if the amp has been on for 20 minutes before you start?
Author:  Steven Kaplan [ Mon May 14, 2007 10:11 pm ]
Post subject:  Re: Odd problem
Do you run your monitor in such a way that it would cause a short to your mains though ?    Assuming the monitor was the problem ?  How would the monitor cutting out affect your mains ?   I guess this depends on how you wire these things...

Was there any popping ?  Pop and cutout ?  That could be a sign of grounding problems.  Certain amps will go into protection mode if there are significant ground probs... or there's an overload.  Not sure how you wire your setup..   Have you checked your jacks and speaker cables for bad solder points ?
Author:  karyoker [ Tue May 15, 2007 7:13 am ]
Post subject:  Re: Odd problem
LMAO
Quote:
BL EON 12?  Do you mean 10?  Hooking into the line out also must mean it's a powered speaker, Babs speakers are the passive versions.


Yea Lon I meant 10...I was just pointing out one can use powered speakers with the 808....
Author:  jamkaraoke [ Tue May 15, 2007 7:40 am ]
Post subject:  Re: Odd problem
If the problem is JUST on the vocals ..try another  channel - If your like me I hook my mics up in the same 3 channels week after week- maybe they are worn ?
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