I have been RTA'ing 2 Peavey PR12N speakers for a church. I was able to get a flat response across the 31 bands with the exception of the 1.25khz which is falling out of spec by almost a negative 10db. The bands on either side( 1khz and the 1.6khz ) all fall in line. The problem is just with this one band. I have tried correcting it with the EQ but still cannot get it in line with the rest of the frequencies. Could this be an issue with the crossover point ? Any info would be greatly appreciated. Thanks - Brian
hey
Crossover point sounds like a likley candidate. First however I'd recommend taking the speaker to a different location, preferably outside, and set it at a different height from what it was measured before. This'll rule out the cancellation coming from a reflection within the room your in.
However outside of this then yeah i'd say almost certainly a slight phase problem at the crossover is causing the cancellation. How is the speaker powered? Is it an active speaker, biamped or does it use a passive internal crossover? If it's biamped then you should be able to correct it by measuring the impulse and phase of both sections and then adding a little delay to the compression driver to line things up and bring them into phase.
However if its a passive crossover, either on its own or as part of an active speaker, then you may not be able to change the crossover settings to do this, in which case your unfortunately stuck.
k
