I'm new round here so go easy on me!
I run a bar, and we
quite regularlyhost live music in our upstairs room. At some gigs I look after the sound
myself - I did bits and bobs on this front when at uni and there's nothing particularly
complicated to it, the rooms small and all that's needed through the PA is vocals and the
I have an occassional problem where my amp starts
clipping for no apparent reason, the output meters from the desk and EQ are showing the
same and the limiter hasn't been touched (the amp also has an in built clip limiter). We
had a gig the other night where the first band on played about 1/2 hr after their
soundcheck and nothing had been touched, but the clip LEDs on the amp were flickering
straight away. I initially put this down to an adrenalin rush on the singers part, but
all the meters seemed to show the same levels going into the amp.
occurred to me that we're next door to a rather large (1500 seat) theatre and they had big
show start in the intervening time. Could I be right in suspecting that they suddenly
started drawing a lot more power thus degrading my own supply? And if so, would this cause
the amp to clip at a lower signal level?
I actually have a degree in elec &
elec engineering, I have a good understanding of the theory of how amps work but I've got
no idea of what sort of transformer you would typically find inside the box (the amps a
Tapco Juice 1500, hardly top of the range, indeed is this a problem that you would find on
a cheap amp but not higher end stuff?)
Thanks for your time, and in advance of
any advice. I hate to ask for help without being able to offer any myself, but looking
through past threads it seems that most of you have WAY more expertise than I'll probably
ever have. That said I do have an extensive knowledge of licensing laws and other venue
management type stuff so if anyone needs advice there I may be able to help.
ps I did use to deliberately push the amp until the
clip LEDs flickered in an attempt to squeeze just a little more out. Learnt my lesson on
that front the expensive way!
through past posts here educated me in what I was doing wrong in quick time so thanks for
One is too many, two is about right, but three can never, ever, be enough