Members race81 Posted May 13, 2014 Members Share Posted May 13, 2014 We do not run any type of processing, except for vocal effect that is handled thru a mixwiz. We tend to be pushing our system, peavey sp2's over peavey sp218s at the edge at some outdoor gigs. Last friday I noticed a smell out of one of the tops, tore apart and inspected and didnt see much, but could smell that the voice coils had gotten warm.....they did not look burnt. Im not sure what caused this, but tend to think that it was a signal that was clipping. Our band tends to get a little louder as the night goes on,....our guitar player a lot louder. We do not have a FOH guy, and run everything from stage. Question is, ....Will a limiter help in this situation?? Or some other type of processor?? Guess we need some type of protection but not sure what way to head. A sound guy would be great, but is not feesable. Link to comment Share on other sites More sharing options...
Members BlueGreene Posted May 13, 2014 Members Share Posted May 13, 2014 Powered products already have limiters. *edit.. I see they aren't powered eh? your amps might have the limiters at that point* I might suggest working out more control with your volume, as you don't want to be slamming up against a limiter anyway. I also somewhat doubt that you really need to be getting that much louder as the show progresses. The sound guy would probably tell you to stop turning up anyway. Link to comment Share on other sites More sharing options...
Members Tomm Williams Posted May 13, 2014 Members Share Posted May 13, 2014 Damage to a voice coil isn't always obvious. I replaced one in a HPF's not long ago and it didn't look really any different than the new one. What amps are you using? Link to comment Share on other sites More sharing options...
Members race81 Posted May 13, 2014 Author Members Share Posted May 13, 2014 Using a cs3000 for the tops, and a IPR 7500 for the subs. Thats what I was wondering about the voice coils also. Link to comment Share on other sites More sharing options...
Members dboomer Posted May 13, 2014 Members Share Posted May 13, 2014 Yes ... external limiters would give you a reasonable amount of protection (if you set them correctly). Those amps have clip limiters so it's not "clipping" that is the problem but just too much power in general. Link to comment Share on other sites More sharing options...
Members race81 Posted May 13, 2014 Author Members Share Posted May 13, 2014 Thanks Don....... Link to comment Share on other sites More sharing options...
Members Pro Sound Guy Posted May 13, 2014 Members Share Posted May 13, 2014 Take a DC ohms reading of the voice coils with a VOM. They should typically read between 5-7 ohms for an 8 ohmloudspeaker. Let us know what the reading is. I have seen passive xover inductors melted and burned. Take the loudspeaker out and press on the cone gently in and out with both hands on the cone keeping it centered.If you feel rubbing you will have to get a recone. Link to comment Share on other sites More sharing options...
Members RoadRanger Posted May 14, 2014 Members Share Posted May 14, 2014 ^ Yah, if you smelled something burning that something probably isn't long for this world . Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 14, 2014 Members Share Posted May 14, 2014 How did you "look at the voice coils"??? Link to comment Share on other sites More sharing options...
Members RoadRanger Posted May 14, 2014 Members Share Posted May 14, 2014 Link to comment Share on other sites More sharing options...
Members race81 Posted May 14, 2014 Author Members Share Posted May 14, 2014 I have removed the speakers and magnets and looked at them. I have not measured anything yet with a dvom. The windings have a little smell to them but do not look but a shade of difference in color compared to new ones. They made no noise when moving them up and down when assembled. Sorry if Im hard to understand....Im a auto technician for heavens sake!! Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 14, 2014 Members Share Posted May 14, 2014 Ok, BW drivers, I missed that part. If there is no discoloration on the bobbin or VC wire, that's probably not the source of the odor. Link to comment Share on other sites More sharing options...
Members race81 Posted May 14, 2014 Author Members Share Posted May 14, 2014 ok...whats a bobbin?? I can smell the burnt smell on the VC, but its not really discolored that much. I have fried our sub VC's before and they look nothing like they did. Another thing if I may ask you all, how can I check the horn?? Guessing this would be good to know also. Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 14, 2014 Members Share Posted May 14, 2014 Find a pro audio repair guy, experience is helpful here. Link to comment Share on other sites More sharing options...
Members race81 Posted May 15, 2014 Author Members Share Posted May 15, 2014 Thought I did........after I got home I ohmed the vc's, they were right at 6 ohms. And the horns were right at 2ohms. I reassembled them and will test em this weekend. I appreciate everyone's response's. I am not near any "professionals" so I have to use what is available..........and that would be me and this internet thing Link to comment Share on other sites More sharing options...
Members Pro Sound Guy Posted May 15, 2014 Members Share Posted May 15, 2014 You looked at everything except the passive xovers Link to comment Share on other sites More sharing options...
Members dboomer Posted May 15, 2014 Members Share Posted May 15, 2014 It is normal for the VCs in Black Widows to discolor with use. It's not particularly a sign that anything is wrong. Now if they looked burned then that's a different story. Link to comment Share on other sites More sharing options...
Members race81 Posted May 15, 2014 Author Members Share Posted May 15, 2014 Thanks guys I'm feeling a little better about them. If the passive crossover is the board in the speaker cab it looks ok and I can't smell anything around there.. Thanks again,. Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 15, 2014 Members Share Posted May 15, 2014 Horn drivers should not have a DCR of 2 ohms... quite a bit too low. Did you measure them still connected to the crossover by chance? Link to comment Share on other sites More sharing options...
Members race81 Posted May 15, 2014 Author Members Share Posted May 15, 2014 yes they were still hooked up, They were still in the cab and one of the wires I couldnt see so i just alligator clipped the leads blindly. Im livin and learnin here......png.197c47f720636f02390cc2b0a33804da.png' alt='smiley-veryhappy'> Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 17, 2014 Members Share Posted May 17, 2014 Hooked up the the crossover, you were also measuring any zobel compensation and padding that might have been used. Link to comment Share on other sites More sharing options...
Members Pro Sound Guy Posted May 18, 2014 Members Share Posted May 18, 2014 In other words disconnect any driver or loudspeaker you test and then get DCR with a VOM Link to comment Share on other sites More sharing options...
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