First time user advice- First sweep

[Ramairta1]

Hi guys-I just downloaded REW over the weekend and have a mini dsp on the way. I've spent some time learning how to set up REW on my macbook, set the prefrences and take some initial measurements. My initial goal is to dial in my 3 subwoofers but I have quite a bit of learning
ahead of me on how to interpret the data I get from my measurments.
Attached is picture of a sweep I ran on all 3 subs combined. They are gain matched from the MLP and I ran the sweep at 40db above my noise floor. (is that the best approach?)
I have all room correction turned off and all trims on my AV10 processor are set at 0. I am running the 90degree calibration file on my umik2 at the MLP.

Would love to hear some quick advice on what this basic LFE sweep tells me about my subs/room. Should I also run sweeps on each sub individually?
I am watching as many videos and reading up as much as I can in my free time. any advice is apprecaited. thanks!

 

[Keith_W]

1. Every speaker and subwoofer should be measured individually with a timing reference for initial tuning.
2. If you have two subwoofers sharing a DAC channel, measure each sub individually then tune them with the phase/polarity/SPL controls at the back until they blend properly. From then on, measure them together as a unit.
3. It's better to post MDAT's rather than pictures if you have a question.
4. Measurement volume: measure at normal listening volume unless you are conducting a formal test. This is because loudspeakers are nonlinear devices, if you play at a different volume you may get a different frequency response. You want to equalize at normal listening volume, not some artificial volume which is too loud or too soft.
5. To improve signal-noise ratio, it is better to take a longer sweep (512k or 1M), or multiple sweeps and then average them.

Please see my REW eBook for more tips and tricks.