tenor_singer said:
2. I think that they are popping because some fool always trips on the
plug and unplugs the
system from the wall sending a loud "thwack" through the speakers. Could this be causing it? If so that was this fall's reason.
rule #1 i tell everyone with live sound.....ALWAYS ALWAYS ALWAYS turn the
power amps on LAST, and off FIRST. all those little
power up thuds you get in the signal chain sent through a 10,000
watt rig will surely blow things up...and if they don't you can consider yourself lucky. a little tip for
power problems...tape down cables and tie the cable down so no one can accidentally trip over it. too much time has been spent fixing something as simple as an unplugged cable. been there, done that.
3. This spring, my TD turned on a body mic before checking it's volume on the board, which was pegged (some jack-off was messing around with the slides when she wasn't looking). The
feedback that went through the
system was amazing (unfortunatelly she didn't have the destroyer programmed yet). Would this cause the speakers to pop?
you should really have limiters on all your mic channels. if you can't afford that, a good brick wall
limiter on the main output will due. i'm paranoid, so i use
channel limiters on bands with screaming singers, always have the main limited, have my clip limiters on the
power amps turned on, and i still keep an eye on those clip lights. which brings me to my next suggestion....can you see the
power amps from the mix location? if so, you can make sure your amps aren't
clipping. i don't know if your amp has a clip indicator, but most do. it'll probably be red. if it lights up a little
bit, it's ok. if it lights up a lot....turn down the mix. even if you don't have proper
gain structure, and don't keep an eye on your levels at the board...watching the clip lights on the amp will save your speakers. of course, if a
channel is
clipping heavily the mix will sound like crap...but you won't blow anything up.
BTW,
feedback destroyers don't work all that well. their performance varies depending on what model you have, and even then they aren't failsafe. most pros don't even use them. i do on
monitor sends since i can't afford a graphic for every
monitor mix, and it does help a
bit for the singer who likes to roam, but if the case is a mic that is turned up way too high, the
feedback destroyer will not stop this. a
limiter on the
channel though will stop it from getting worse.
i recommend you get at least 1
limiter. behringer would work pretty well for your case. get the 4
channel compressor/
limiter. you can use 2 channels for vocal compression, and use the other 2 for your stereo out. you could even compress your stereo out mix a little
bit with this thing....if you wanted to...i don't know if there's much use for that in theater.