subwoofer... passive or powered?

[GMichael]

My BFD settings are based on manual measurement. The Home Theater Shack site still has the instructions posted on how to do the frequency measurements and set up the PEQ filters manually. They also had an Excel spreadsheet that graphs the before and after measurements, as well as the correction values for the Radio Shack analog SPL meter. If it's no longer on the Home Theater Shack site, let me know if you want me to e-mail it.

I tried using the REW application with my analog meter, and it identified three filters that I should apply. I wound up getting some bizarre sounding results, so I reverted back to my original settings (I currently use 9 EQ filters). A calibrated mic might give some better results.

9?!

My my. Aren't you the master tweeker. How long did that take you to do manually?

[Woochifer]

9?!

My my. Aren't you the master tweeker. How long did that take you to do manually?

Setting up 4 PEQ filters would address the most pressing room-induced problems with my sub, and I could probably live with that. But, the BFD allows for 12 channel adjustments, so why not take advantage of that, especially since the PEQ allows me to really target a specific frequency as widely or narrowly as I want? With 9 filters, I have the frequency curve close to flat all the way down to 25 Hz at my seated position. I've done some other experimenting with frequency curves, since the BFD allows you to store multiple profiles.

First time it took me about 90 minutes to do the initial measurement, calculate the filter settings, adjust the BFD settings, and then remeasure the output and make the final adjustments. I repeat the process any time I move the sub or make a major rearrangement to the room. Nowadays, I can compete the process in less than an hour.