OP
- Thread Starter
- #41
Nice work!
What gating do you use for 200Hz upwards and what is the distance from mic to the speaker? Do you put speaker in centre of the room on some stand or..?
I gate measurements at 6.5ms and measure from 1m in the center of my room on an elevated stand, which is placed on a turntable. The room is narrow but has 16ft ceilings, so usually i have a little over 7ms to work with, but i keep it at 6.5 to be safe.
1m isn't ideal for driver integration, but as I only intend to measure bookshelf speakers and the reactors are particularly small, this isn't a problem. Just to be sure, I always repeat a few on and off axis measurements at 2m to make sure there isn't a major difference, and so far no speaker I've measured has shown any meaningful variation at 2m, though obviously I have less resolution to work with at low frequencies at that distance.
For this particular speaker, I could not just turn it on its side to perform vertical measurements because that would impede one of the woofers from moving. So I had to do them more manually by repositioning the speakers and my microphone stand for each measurement using an angle finder, ruler and and a laser. This surely introduced some user error, hence the messiness of my vertical measurements a few posts above. However I do not think it matters tremendously once averaged, especially considering the speaker's even dispersion.