graph of my sub

[baritone]

Below, I hope, is a graph of the my subs response to rew after applying some filters.If you could comment on the results please.I am using my av receiver and the FBQ2496 BFD:if I ever get around to finishing these tests, is it just a matter of disconnecting the computer and spl meter to get everything back to normal,has anything got to be done to the BFD settings.

regards:Alan

[brucek]

Looks quite good, although I might bring the 60Hz area down a bit more, but you can wait until you check the crossover. Now that the sub is equalized you have to turn on the mains with the sub and see how the two play together around the crossover area. Your goal is for the best transition. Measure the sub + mains in the exact same procedure you use to measure the sub by itself.

Sometimes the interaction of the two creates new dips or peaks that can be taken care of using the following methods in this order.
Phase control of the sub, time delay of the sub, additional or tweaking of existing filters.

brucek

[baritone]

Hello brucek

Thanks for the reply,how do you load the original filters back and then tweek them and then load them back again.

Thanks;Alan

[brucek]

Well, I assumed you saved the raw mdat file using FILE / SAVE MEASUREMENT and also saved your filters using FILE / SAVE FILTERS.

Then at any time you can recall the mdat file and filters and tweak by using FILE / LOAD MEASUREMENT and FILE / LOAD FILTERS.

Or you can take a new raw measurement and recall your filters and apply it to the new raw measurement.

brucek

[baritone]

Thanks for the reply and I did save those files,just a bit unsure about applying the filters for the sub to the sub+mains,I will now run the set up for the mains+sub.

Regards:Alan

[brucek]

just a bit unsure about applying the filters for the sub to the sub+mains

You can simply take a measurement of the sub and mains (with the filters engaged in the BFD) and see how it looks. Then if it looks good or requires simple phase or distance adjustments, then you're done - no filter tweaking required. If it requires adding new filters or tweaking old ones in the BFD, you can play by hand from the front panel and take measurements every tweak to see how you are doing.

or another way (if you find you need to tweak filters or add new ones after the mains are added) is to take a measurement with the sub and mains with the BFD filters shut off. Then load your saved filters file into REW and apply it to the new mains + sub measurement. Then tweak and load those new filters...

brucek

[finalrinse]

When the mains are run with the sub, is it preferred to use just the two front, or all five or seven?
Thanks,
Tom

[brucek]

When the mains are run with the sub, is it preferred to use just the two front, or all five or seven

Only the front 2 mains in stereo - never with a soundfield selected. When the sub is checked alone, that is also the mode it should be in only - stereo.

brucek

[finalrinse]

brucek wrote:

Only the front 2 mains in stereo - never with a soundfield selected. When the sub is checked alone, that is also the mode it should be in only - stereo.

brucek

Ok - Thanks!

[baritone]

Hello everyone
below is the graph of my mains +sub,comments please.I am still confused as to the correct method of obtaining the filters back into REW to(1) check if they work and (2) to add to them or tweak them to reduce remaining peaks.The reason I say this is that I cannot seem to get rid of that peak at the end of the graph I seem to be adjusting filters,loading them back in but it won`t go away.
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