Behringer FBQ2496 feedback destroyer used for parametric EQ of SUB BASS
Yes that’s right used as parametric EQ for sub bass.
It’s a bit of pig’s ear that takes a bit of getting used to, to get the Behringer FBQ2496 to act as a parametric EQ for the sub bass.
Well I practically gave up with it last December or was it late November? No matter I shall continue. Some have had good success with this model and its predecessor the DSP1124P as an affordable [sub bass EQ] solution.
I noticed that with the two sub bass speakers that I use one for extension of the lower octaves from LCRS [left centre right and surrounds] into one sub bass speaker, while the larger one is used for LFE.1 only with movie soundtracks. Well the issue that I kept getting was the EQ settings where the same on channels A & B.
After twigging onto it, I realized I shouldn’t keep the [left and right] EQ programmer in ((stereo)) mode this was only sending the same programming data that I was inputting.
The frequency bands that I programmed into the BFQ2496 are as follows for both channels A and B.
1 211Hz
2 200Hz
3190Hz
4 180Hz
5 170Hz
6 160Hz
7 151Hz
8 141Hz
9 130Hz
10 120Hz
11 111Hz
12 100Hz
13 90.3Hz
14 80.5Hz
15 70.1Hz
16 60.3Hz
17 50.2Hz
18 40.3Hz
19 30.2Hz
20 20.0Hz
For example the level of the frequency that I wanted to reduce or increase along with the shape of the frequency was all being sent to the next channel. Plus I noticed some form of feedback as if the sub bass had a delay, so when I pursed the DVD I’d hear a sound kinder of echoing away with a time of 1 second.
Well I’ve revised over it again without the use of the owner’s manual because it reads like stereo instructions for a foreign language that I can’t grasp or understand. As long as the unit is working and no there isn’t any [radio interference from the BBC] coming though the FBQ2496, hopefully?
The programming of the channels is displayed here. I use the rotary dial that is placed next to the power on power off switch on the right-hand-side, to select the frequency that I want displayed for parametric EQ use.
I’ve still got limited use between monitoring the frequency spectrum with my [Techincs SH-8055] GEQ that has an RTA display I need more precise monitoring of the RTA and that won’t happen until I install a DEQ2496 that’s being talked to death in the forums.
This was how it was at the previous home
And this is how it is now at present.
There is even a site where they discuss in great lengths about implementing the Behringer FBQ2496 feedback destroyer and the DSP1124P.
http://www.hometheatershack.com/forums/bfd-forum/
One little nitpick is the display I would have liked it if Behringer had a LCD display so that I can see the shape of frequency curve from [narrow to wide] but this unit was never intended for sub bass use in home cinemas, but its proved to be quite a useful device over the past few years.
The bass range is a bit smoother and still I’d like a tiny bit more in the upper portion of frequency response, not too much so that it clouds or colours the overall frequency response otherwise I’d be overwhelmed by noisy sub bass tones.
Changing the shape of the frequency I believe it’s this button that changes or alters the size of the tone.
Then by using the rotary dial and listening to the sound of the tone transformer shape from wide and narrow, that’s the impression I’m getting from it.
Test tones I have are ether logarithmic frequency sweep from 10Hz to 20 KHz all channels, via the dts music and demonstration set-up disc CD. Or I can use the spot frequency tones via my Denon CD test disc, or I can patch a long lead into the room from the pc to the AUX input on the Kenwood KRF-X9050D THX select and use the stereo modes and Dolby pro-logic modes, with tones being sent from the TureRTA via its own sound generator.
