I outputted a pink noise signal, the pink noise have energy at all frequencies, also at 40 Hz, without the sub low frequency energy was gone, far above 40 Hz (from the sound in the room). The SPL-meter needs no correction factors.
Exactly my point, something is causing the measurements to be strange, wrong setup from me perhaps? Some weirdness with the microphone? Thats what i am trying to find out, so i can fix the problem, and be sure the measurements are correct.
I measured it with a Sound pressure level meter.
How can a room reflect in such a way that a speaker who is probably at - 20 dB or less at 40 Hz is measured at - 3dB? Even if the speaker was placed in the corner (which its not), and the higher frequencies where not reflected at all (which they are), I just cannot see where such an enormous boost can come from? And why would i not measure the same effect with a sound pressure lever meter?
Originally Posted by pepar
Yes, the "room" can. Actually, it is not the room per se. It is the WALLS, as in nearness to. Nearness to two walls even more so.
No, it cannot, the rated response of the speakers is to slightly under 100 Hz. At 40 Hz, they would be more than 20 dB down. I confirmed this with a pink noise sound measurement just now, the speakers is nowhere near 40 Hz as a crossover in my room.
Hmm, it didn't say anything in the setup guide, but i have a problem with audyssey setting the crossover way to low, my speakers extend down to maybe 90-100 Hz, audessey austo-setup claims them to be large, full range, or in the 40-50 Hz range for crossover. I'm not quite sure i trust the sub-levels either when the crossover is so far off, any tips?
Yeah, when using dual-monitors, my hdmi-audio is labeled as "not plugged in", i don't know what the probelm is, it worked a year ago or something with another driver-set. Too bad there is noe software-realtime encoding over spdif, migh just get a new graphics card then
Jrwalte: EAX doesn't work in vista, win7 does it?