Re: Technical SNAFUs at last night's gig. Help? (long)

On Jan 31, 8:47 pm, "Mike Rieves" <mr...@xxxxxxxxxxx> wrote:
"Stipo" <co...@xxxxxxxxxxxxxxx> wrote in message

news:479ea260$0$26010$88260bb3@xxxxxxxxxxxxxxxxxxxx





But do look into all these issues--the brownout potential is very
compelling.  Are you running lights and such as well?  If so how many?

Lights are on a different circuit -- otherwise I 'spect we would have
seen them dimming all night. We ran the other side of the stage (just
keys and one guitar amp) off one of the lighting circuits.

I have doubts about the brownout theory.  We run everything on one circuit
as well....but if we add lights, "poof" goes the power.   Takes a second
circuit for them.  Of course it'll depend on what kind of amperage draw
you have in your equipment.   Offhand I can't say in amps what we run, but
briefly in equipmentese....  2 x 50W Marshall amps, Behringer 300W bass
head, Behr 180W keyboard amp, 2 x keyboards, main mixerboard, and finally
three Behr EP2500s and one QSC 1450. Oh.  And ONE tiny 110V spotlight !
Never a tripped circuit with this outfit, in fact before we added "extra"
lightning we had 8 pinspots and 6 Par56 cans as well.  When we added more
(not many, just a LITTLE more) lighting we began tripping breakers, thus
we are now a "two-circuit" band.
I have prolly only muddied the waters.....    Stipo

  We aren't talking about drawing excessive current here, we're talking
about brownout conditions where the AC line is 100 V or less. Current draw
isn't excessive, line voltage is just low, resulting in the inability of the
equipment power supplies to supply full voltage to to the circuitry,
resulting in clipping at lower than normal levels, possibly in preamp
sections as well as power amps.- Hide quoted text -

- Show quoted text -

I've seen the issue Mike is talking about result in a pair of blown
18" JBL woofers, when the Crown Macrotech 2400 driving them went DC
due to low voltage.

I'm consistently amazed at how much variance equipment WILL accept,
where voltage is concerned, but man... when you exceed the limits of
the gear, all SORTS of goofy things start to happen.

Corey
.

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