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Old 02-13-08, 01:53 PM   #13 (Link)
 
brucek
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Re: Questions on REW..


Quote:
Also , when setting the sweep, I put in 22kz top end, for the extra headroom. Does this effect the measurement? Instead of stopping the sweep @ 20khz?
From the HELP FILES:

Set the End Freq to the highest frequency at which you wish to measure. The sweep will span the range from 0Hz to twice the frequency you set (with an overall limit of half the soundcard sample rate) to provide accurate measurement for the selected range

Quote:
Please ecxuse my ignorence, but how can you put up multiple measurements on a single graph. Instead of flipping back and forth from one graph to another?
From the HELP FILES:

All Measured TAB
This group shows the measured responses for all measurements on the same plot. The "Separate the traces" check box offsets each trace downwards from the preceding trace to make it easier to distinguish individual features when the traces are at similar levels.

It allows up to eight traces on one graph.


Quote:
I have the xover turned all the way down as to not hear the midbass. I am just adjusting the "main" sub in the far corner, of the rrom, for blend. What do you think?
Yeah, a bit tricky when two filters are used for one sub - one from receiver crossover and one in the sub itself. Then you are trying to mix two subs with different frequency ranges in the same room - tricky. Usually when a sub is crossed at 80Hz, it's not localizable, although anecdotal evidence may dispute that somewhat. Have you tried an overall 60Hz cross? (perhaps your mains won't extend low enough to support it though).

I'd certainly start by integrating the single main sub and then begin to increase the level of the close sub and take measurements to check what's happening.

brucek


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