Graphs; Recommendations? House curve?

2010 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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Wayne A. Pflughaupt

· #2 · Feb 23, 2009

Please re-scale your graph for a 15-200 Hz horizontal and 45-105 dB vertical axis. You can do that by clicking on the "Graph Limits" icon in the upper right corner.

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?

Any equalizing comes at the expense of headroom. Whether or not you have enough left - you'll find that out once you start using the system. The tell-tale sign will be nasty noises from the sub drivers as they bottom out; however, some powered subs have built-in limiters to prevent this. In that case, you'll notice that bass levels no longer increase in volume with the rest of the system.

Regards,
Wayne

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Wayne A. Pflughaupt

· #9 · Feb 23, 2009

Thanks for the info. I guess what I'm asking is this. Once I load the calibration file and apply windows, I will likely start over. What type of curve am I after? Should I follow the original blue target line or the black SPL calibration line? Does this mean that there is already a house curve built into my "after" graph (since I didn't use the .cal file)?

The blue line is the Target Curve – that’s the one you’re concerned about. It appears that your house curve has been added to the Target, so you’re in business. Once you load the mic calibration file, your graphs will be correct, even the previous ones, provided you saved them.

Regards,
Wayne

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