graph looks prettier when i cross to 120 hz. less sharp dips in the 60-90hz range. i wonder if that's because i'm using the mbm-12. Dynamic EQ is on in this graph.
It's best to keep your output levels 40-50 dB above the noise floor, and the graph's floor should be a good reflection of the room's ambient noise floor. A 45 dB lower graph limit is fine for frequency response readings, but kind of high for a waterfall, since most domestic rooms have ambient levels at least 10-15sd dB lower.
Keep in mind that the meter in C weighting has fairly flat response down to about 40 Hz. Also keep in mind that it can only register one figure, and that will be the frequency that is the loudest.Thanks but I'm curious about the fact that my SPL reading on REW is around 57 db when there is no signal through my receiver - like right now while everything is idle. So, isn't 57db my noise floor? I live in NYC
If you use enough of them, bass traps will deliver a faster rate of decay, as these graphs show:i have no idea if this means traps will make a significant difference or not.
You will not be able to get a representative measurement from any "dynamic" features using a swept sine, the nature of the signal is very different from anything a dynamic feature might be configured to process, different sweep lengths and end frequencies (and hence different rates of frequency change during the sweep) could give very different results. A better idea might be to use the RTA graph with the Periodic Pink Noise test signal, that would give you a view of the dynamic response with a signal that has content across the band.did some more measurements
as i suspected from watching movies, Dynamic Eq (not to be confused with Dynamic Volume) via Audssey is boosting the bass. and i was careful to check the SPL level when switching back forth from dynamic so the sweep would still be at 80db. left the mains on