Post by KeithL on Jan 14, 2015 15:08:44 GMT -5
In specific, line arrays couple to the room rather differently than normal "point source" speakers.
1) The actual SPL will drop off at a different rate for a line source than for a "point source" speaker. (Your mains may be less efficient, but the sound level should drop off more gradually than with regular speakers as you get further away - it should be closer to an inverse square whereas point source speakers follow more or less of an inverse cube... and this will depend on where they are positioned relative to the walls.)
2) There will be less interaction with the ceiling and floor - because vertical line sources have rather narrow vertical dispersion.
3) How extreme this difference is will depend on your speakers and your room.
All of these factors would contribute to make it likely that you would see a bigger difference between different types of measurements than you would see with "normal" speakers. Since Dirac takes extra care to include room interactions into account, I wouldn't be especially surprised to see major differences between how it treats line sources and "regular speakers".
I would suggest you see how it SOUNDS and pick whatever way sounds best to you.
Anyone measure the individual Speaker Db levels with a SPL meter after running DIRAC, by using the speaker level test tones?
Should these all be "close" to one another within a certain range, and if not, adjusted for balance or just rely on DIRAC?
I am noticing a big difference (my mains are huge line arrays and not as "efficient" as the large center, smaller Klipsh Sides, and Bose Rear surrounds).