feedback in the pa system???

[toolcomander]

so this school we built has sound traps only on the units supporting the stage area , but none on the duct for the rest of the building, 3 massive units 8-10 ' apart on the roof , now the current complaint is "feedback threw the pa system during performances , do to supply fan motor" if this was true ... i asked some people , im 1/2 year aprrentI an dunno nuffin and this isnt my problem i heard it threw a tiner, but i was wondering if a "frequency disrupter " or some kind of star trek item exsists

kthnks.

[tpa-fl]

English, please?

[Wild Leg]

You are looking for something similar to a surge protector.

The sound system is probably supposed to reject the "noise" from the motors, but it's easy to blame it on the A/C.

Call a sound specialist for recommendations.

[snipe70e]

If the sound system is on the same panel as the supply fan it is possable.
Or if the amps are on different panels and the fan got added to one.
All components of the sound system should be on a panel and transformer with out equipment on it.

[fixitman]

It sounds like you are dealing with an acoustical issue rather than an electrical issue. One approach to dealing with noise from air handlers is active sound cancellation. Check out this web site:
http://users.erols.com/ruckman/MoreInfo.htm

[greybeard]

Are you talking feed-back or a hum. these are two totally different problems and therefore two totally different solutions