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L3t Crackling Noise.


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#1 litesnsirens

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Posted 19 May 2013 - 07:57 AM

I have a pair of L3t's and an L3s (Also a pair or L2t's and a M20d). I have been using this system for about a month and I love it.  I just set up the L3t's, L3s and M20d back up in my basement and noticed I am getting kind of a crackling noise from one of the L3t's.   It's not as farty sounding as if there is blown speaker (but I don't know) it's a kind of crackling sound that lingers a bit when certain lower frequencies are played through it.  Otherwise it's still sounds pretty good.  It's past 30 days since I bought it so Long and McQuade says I'll have to send it in for service.  I was just wondering if there is anything else I can check in the meantime.  Could it be the result of a bad cable over the L6 link?


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#2 litesnsirens

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Posted 19 May 2013 - 04:43 PM

I did a little more trouble-shooting today.  I got thinking about the problem and recalling that a blown speaker just isn't capable of having any decent sound at all.  So I figured it most be something else.  I turned on only that speaker and then plugged into the mixer in the side and played a few things through that.  Perfect sound... none of the crackling sound.  So having determined that there was nothing wrong with the speaker I figured it must be the cable.  Sure enough it was.  It's a brand new cable so I had a hard time thinking of it first.  But for anyone who is all hooked up via the Line 6 Link.  If you get some crackling in a speaker, replace the cable that is feeding that speaker.  Just a heads up.  It's a quick easy fix... if you know what it is !!!


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#3 silverhead

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Posted 20 May 2013 - 05:07 AM

I have experienced a similar thing and also traced it to the L6 LINK cabling. However, in my case, it seems the problem was a temporary connection issue and not a faulty cable. The symptom disappeared for me by simply disconnecting and reconnecting the same cable.

 

I'm not sure this is the same for you but it might be worth testing that cable again before discarding it.


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#4 litesnsirens

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Posted 20 May 2013 - 06:58 AM

Thanks silverhead, I'll try the cable again. I had unplugged and plugged if back in but only on the offending speaker. The flawed connection could have been at the sending speaker. Like I said brand new cable.
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#5 scotterp

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Posted 27 April 2014 - 11:57 AM

This happened to me at a gig on Friday. It started during the first set and sounded awful. Simply decided to finish the set with that speaker off. During the next break, we did some trouble shooting. Unplugged cables and put this speaker at the beginning of the chain rather than at the end. Could not replicate the problem. So we hooked it all backup and all was well for the rest of the night.

I seemed to recall a discussion on this and found this today. I am going to double check all of the cables before the next gig to make sure all is well.

As a final note, I did not hook up the cables this gig for the first time, our lead singer did it. Maybe he was the problem. Damn lead singers! :)
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#6 SiWatts69

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Posted 27 April 2014 - 01:44 PM

Just out of interest... was the "new" cable a distinct AES/EBU or L6Link cable or just a standard mic cable? What end connectors? Neutrik or something generic? Who made the cable up, ie manufacturer?

Not that I'm attempting to diagnose anything, but for the sake of clarity, it might be worth others knowing if there is inconsistency in a given suppliers cables.
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#7 scotterp

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Posted 28 April 2014 - 01:25 PM

The longer runs (20 and 25 feet) are AES/EBU cables manufactured by Best-tronics. I do have a simple mic cable (6 feet) running between one L3t and the L3s. I suspected that could have been the culprit but everything worked well after replugging everything in. To avoid any further issues, I will be replacing that with an AES/EBU cable. In the end though, I still suspect that our singer did not seat one of the cables properly. 


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#8 dboomer

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Posted 28 April 2014 - 01:37 PM

Crackling can occur if you are connected via L6 link and the cables are not AES spec.  Usually it's not a problem to use regular mic cables with runs 10'feet and under.

 

So what I would check first is the firmware version of your speakers.  Hold the feedback button in while you power up and it will read (quickly) in the LCD window.  There was a firmware rev (1.05) that did eliminate clicking that could sometimes happen if more than 3 speakers were hooked together.  If you have an older version then you should flash the speakers with the newer version through your M20d.

 

If you have the newest firmware but are hearing clicks then I would check whichever speaker you are hearing the clicks in with your 6' mic cable and with your Bestronics cables and see if if clicks with both.  It's possible that the cables do not meet AES specs but you'll need to prove that out.  One other thing to check ... does the number in the LCD window flash when you hear a click.  If that is the case then I suspect a jack or plug is not making complete contact.

 

If you have the newest firmware and it clicks with any and all cables then it probably needs to get looked at by the service dept



#9 scotterp

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Posted 28 April 2014 - 02:08 PM

The firmware is definitely not 1.05. I checked that a while back when I first got the speakers. I think I also read that unless you were having issues with your speakers you didn't need to update the firmware. So I didn't at the time. 

 

I wouldn't describe the sound I was hearing as a click or clicks. It sounded like one of the speakers was blown - in particular the tweeter that is in the middle of the L3t. And only when the guitars and vocals were playing. While troubleshooting, I had the bass player play - sounded fine. Had the drummer join in - it sounded fine. Then when the other guitar player started to play, it sounded terrible. It sounded like the signal was breaking up. Same when the singer sang. So it appeared to be isolated to certain mid frequencies. I did not notice the number in the LCD window flash but I was also not really paying attention to it. After we replugged everything back in, all was well for the remaining 3 sets of music. Once again got compliments from people saying we sounded great (after hearing from some people early on that we sounded terrible!). 

 

Note that the 6 foot mic cable is one that I've had for a long time. I don't know who made it. Not high quality. It was just the right length so I used it. I have better cables around (longer) that I can use instead. 

 

Where can I locate the new firmware? Is it posted in the download section? I'll certainly take care of that first. 


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#10 scotterp

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Posted 28 April 2014 - 02:17 PM

I found the firmware update. I'll try to get that updated soon. I don't have another gig where I need to provide sound for the band until the end of the month, so I'm in no hurry at this point.

 

Thanks for the input guys!


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