This bites!!!

[avkid]

I got a call at 7:30 tonight(the 9th)from the sound department head telling me that there was nothing coming out of the mains. This is reall weird because I used the system earlier today and had only a small bit of a problem with volume response. The equipment is as follows:
QSC power amps http://www.qscaudio.com/products/amps/rmx/rmx.htm#

Mackie SR32•4 VLZ PRO 32x4 bus mixing console
http://www.mackie.com/products/sr32-4vlzpro/index.html

(2) Mackie C300 Passive 12” 2-way Loudspeakers
http://www.mackie.com/products/c300/index.html

 

[lxdeptnz]

Well.. can you get on site? if so, or if not... check signal flow. source thru mixer to amps. Also the routing on the desk- if it is going thru the groups or not. Compressors or whatever inserted? if so then are they turned on, bypassed or functional?
David

 

[propmonkey]

we had a problem like that awhile ago, we couldnt figure it out. we finally found out that someone bumped the master volume on our group 3 eq. it took us awhile to find that but we did.

 

[Kruton]

Make sure you are getting decent levels out of the mackie mixer. I reasently had a problem that the right chanel was not responding. I linked it the the "Tape to mains" Button it has a bad cold soder on it.

 

[avkid]

but why the gradual failure?

 

[avkid]

What are the signs of a damged cone?

 

[avkid]

main out plugged into something that went nowhere!

 

[LDSFX]

That happens at my facility from time to time. It is usually because someone has forgotten to turn on the feedback suppressor. Without it, the main gets no volume.