Have you used a frequency/tone CD w/SPL meter ...

I tested my system and room from 10-300hz by 1hz increments from my listening position and was startled by the results.

Response varied by 15-20db in very narrow ranges (+-10HZ). Just by moving my head 1-2 feet there were huge differences. Nulls all over the place.

I am not sure how to interpret the results, because they varied from place to place.

It also takes a while. 290 readings at 10sec each takes an hour. Moving speakers by trial and error then remeasuring could take some time.

I am told that to do it right you should use 1/3 octave pink noise and a spectrum analyzer.

Ken

Eldartford,

Would you please tell us some more about using the spectrum analyser? What other equipment is required, microphones, sources etc.

Any suggested reading?

Thanks, Ken