No change after BFD...

**mlmore** · **04-26-07, 09:53 AM**

Thanks to all of you who helped my fix the ground loop issue. Now I seem to be in need of help with the BFD. I tested the sub with REW, applied the filters, reran the test with the filters active and I see very little change to the overall plot. I'm sure I am missing something obvious to you all, so feel free to point out my ignorance!

**brucek** · **04-26-07, 10:24 AM**

How did you load the filters into the BFD - midi ?

Is the IN/OUT green LED steady on?

brucek

**mlmore** · **04-26-07, 11:14 AM**

I loaded them manually...no midi. The green light is on.

I read the instructions thoroughly. I set the input level. Used preset 5 to store the three filters suggested by REW. The three LEDs are lit. The left channel is used (output 1). I'm set to preset 5.

I think it's working somehow because if I crank the gain up in the 40-50Hz range, I can here more buzzing from my sub (I still have a little hum). But the REW plots barely budge when I rerun the test.

**brucek** · **04-26-07, 11:34 AM**

Easy to check.

Play a 40Hz tone with REW and manually add a 40Hz filter with a cut of -48dB. Turn the filter on and off and listen. You'll know if it's working. If it's not, then something is probably not set up or hooked up correctly.

brucek

**mlmore** · **04-26-07, 12:49 PM**

I should have paid attention to the little kHz indicator when I programmed the filters. Your test worked like a charm.

**brucek** · **04-26-07, 01:26 PM**

Quote:

I should have paid attention to the little kHz indicator when I programmed the filters

Don't feel special. That's a real common mistake......

brucek

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