Graphs; Recommendations? House curve?

2013 Views 12 Replies 4 Participants Last post by brucek, Feb 24, 2009

jschaefer7406

Discussion Starter · Feb 23, 2009 (Edited)

Hello again,

Set up my BFD today and would like some input. Here is what I started with:

Front subs:

Rear sub:

Through moderate low boosting (I know it's usually not recommended, but the concensus seems to be that it's okay if it actually helps), I was able to get it truly flat:

Front result:

Rear result:

Now, as most will agree, it sounds lacking. Should I apply a house curve? Is my boosting okay, given the graphs to show the result? Both amps are at only 1/2 volume, so headroom should be okay? Please advise.

Thanks,

Joe

P.S. - I calibrated the RS digital SPL meter in REW, but did not load the correction file. Is this accurate (being I compensated it in REW), or will I have to re-run it with the correction file loaded?

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brucek

· #4 · Feb 23, 2009

Any thoughts on whether I should load the correction file, or is it enough simply to calibrate the SPL in REW?

The results are meaningless without the correction file. The calibrate SPL has nothing to do with correction except to balance levels between the real meter and the REW meter.

Load the correction file and apply the changes to the mdat files. Use the Impulse Response Windows 'Apply Windows' button after loading.

You will then need to redo all your filters.

brucek

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brucek

· #6 · Feb 23, 2009

Load the mdat file that was created without a calibration file.

Load the calibration file.

Click IR Windows.

Click Apply Windows in the IR WIndows popup while watching the response graph to see the change.

The graph will now reflect the results with the Calibration file.

Save the new mdat file.

brucek

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brucek

· #11 · Feb 23, 2009

since the graph is the same even with the file added?

Then you didn't apply the calibration file to the old mdat file. It would not be the same.

brucek

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brucek

· #13 · Feb 24, 2009

Am I missing something?

Yep, I just don't know what it is.

If you examine the Radio Shack digital meters calibration file at 20Hz for example, you can see it will add +6.5dB to the signal from the meter at that frequency. So, you can see how it would be impossible for the graph not to change at all.

brucek

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