You've done a good job. Hopefully the room will co-operate and the predicted will become the actual.
My first thought is to boost that low end, which I know may depend on my room and the trial and error thing. Are there certain sized bandwidths to avoid?
Bandwidths can be any size, whatever works. Gain is the trouble maker. Sometimes you need to apply two filters side by side to get a result. If you have the filters available it's better to divide a large gain or cut in two and divide it between two filters. Two at +5db is better than one at +10db at the same or close frequency. The filters with gain shouldn't be too high, but there is nothing wrong with some gain if it works - you have a fair bit of headroom with your sub amp.
Note you can save your filter settings in the BFD as a req file under FILE / Save Channel Filter Settings. Then you can recall the raw mdat file and recall the filters and play with them off line - at work perhaps... uhoh :devil:
Also, I really don't care much about the frequencies above 120 or so, since my crossover is at 80. Why would I waste time on those high frequencies around 200
Exactly. If you run out of filters you can steal filters from the higher frequencies since they have minimal effect. For example, your filters # 3, 4, 5 ,6. While they do a great job of making the response at that point close to the target, they are working in a frequency area where the signal is 20dB down and the mains will be overwhelming that frequency with their own signal. You may be able to use a single wider bandwidth filter there (that doesn't do quite as good a job) and steal three of the filters if you need them for lower frequencies.
Next. Since you are using an IB, you can't move it around to obtain a better response, but I wonder if you took a few other sweep measurements at a few different spots to see if you happen to be in a null where you're measuring. Some people have to average out their final EQ'd signal to satisfy a larger listening areas and some EQ for a single sweet spot.
Next step. Once you feel you're satisfied with your response, it's time to check the integration with the mains. This where you'll see the interaction at the crossover that sometimes creates a problem. You may have to adjust some of your filters to modify the results.
Turn on your two mains and do your sweep (with the BFD filters on of course)
exactly the way you have been doing it. Now you'll get two pieces of information.
One is that you'll find what the level balance between the mains and sub are. If you find the sub too low in relation to the mains, here is the time to turn up that sub amp (or the processor sub trim if you feel it needs a boost to get more level into the BFD evidenced by the BFD LED's). Some people like their sub 10dB higher than the mains and some like it flat - whatever you think. Adjust the level of the sub and redo the sweep until it matches where you want it.
The next information this test reveals is the crossover area interaction. You may find you have a bad dip now at the crossover. You might have to completely or at least modify filters in that area to smooth this overall response. A regular sub has a phase control to play with. This has quite a bit of an effect on the crossover area. An IB doesn't usually have that convenience, so you rely on filters to do the job.
Anyway, you have to get the sub completely EQ'd before you test with the mains, but now you know the next step anyway. Then you're done except for listening tests where you might adjust the overall sub gain up or down a little to suit.
brucek