AndyLoudon Posted February 22, 2009 Share Posted February 22, 2009 Hello, I'm here to pick your brains about a matter that has become a major problem where I work. First, a bit of background about the situation/setup. I work in a rehearsal studio. We have many rooms, each equiped with Nexo PS15s. 2 hung from the ceiling as mains, and 2 on the floor as wedges in each room. Each pair is powered by a Crown Macro-Tech 3600VZ. Desk is a Midas Venice in each case. How we work: Band hires room, and then they are pretty much left to their own devices for the duration of the rehearsal. We only tend to step in if they ask for help, or we see/ hear a need for them to be helped with something. Anyway, we've been having major problems with the HF drivers blowing in lots of the boxes. Typically, we loose two or three a day, and we cannot figure out what the problem might be. Its getting expensive too! Well, when I say that, we have our suspisions. We suspect that the majority is caused by feedback from either inexperienced users (rarely happens to be honest), or people misusing our recording setup (more common - having the room mic, and the playback channels open at the same time). Also, we've noticed that it tends to happen more often when keyboards are being run through the PA. Finally, I should say that it happens in all rooms, so is not a specific fault with an individual piece of eqiupment. Can anyone shed any light on what might be causing this, or ways of stopping/reducing it happening? Link to comment Share on other sites More sharing options...
fatfrog Posted February 22, 2009 Share Posted February 22, 2009 Are ye using the specific nexo controllers with the amps??? Nexo boxes require to own controller to work properly & for protection. Alan Link to comment Share on other sites More sharing options...
AndyLoudon Posted February 22, 2009 Author Share Posted February 22, 2009 Ah, sorry. Knew I'd forget to add something. Always happens when I type a long post! Yes, we are using the controllers. If theres anything else I've forgotten, just tell me. Cheers,Andy. Link to comment Share on other sites More sharing options...
Dmills Posted February 22, 2009 Share Posted February 22, 2009 Check the amplifier gain settings, and also that the feedback connections to the controllers are right. Loosing the amplifier output feedback to the controllers could very well do this as could having the power amp gain be excessive. If you are using the TD controllers then IIRC there is a trimmer to set how well protected you want the boxes to be (tradeoff is volume obviously). Regards, Dan. Link to comment Share on other sites More sharing options...
ChazHS Posted February 22, 2009 Share Posted February 22, 2009 As the others have said, check the protection on the TD controllers. The only other thing is, if they are pushing the system REALLY hard then the controller may not be protecting 100%, it can only protect so much after all! Link to comment Share on other sites More sharing options...
StevieR Posted February 22, 2009 Share Posted February 22, 2009 Another possibility is the gain structure in the system. Too hot an input signal or excessive clipping from the desk can lead to such problems and most processors cannot prevent against this. Add in inexperienced users who do not know how to monitor gain settings and hey presto, no HF unit! Steve Link to comment Share on other sites More sharing options...
AndyLoudon Posted February 23, 2009 Author Share Posted February 23, 2009 Cheers for the input everyone. I shall take this information into me next time I'm in work, and see if theres anything that can be done. Shall report back at some point too if we ever solve the problem! Link to comment Share on other sites More sharing options...
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