Originally Posted by Ricci
Get a USB to RS232 cable (monoprice has a nice one for cheap) and download the software from Behringer to control it on your computer, if you haven't already done so. That's #1.
Didn't realize it could handle USB. Bought the USB to RS232 interface from Monoprice.
Been meaning to get a cable for mine for awhile.
As far as this thread goes. A common question around the DCX is "How do I setup a subsonic below 20hz"
Perhaps some examples with figures that give a particular result.
For a 19hz 4th order subsonic, do the following: ....
For a 18hz 4th order subsonic, do the following: ....
For a 17hz 4th order subsonic, do the following: ....
For a 16hz 4th order subsonic, do the following: ....
For a 15hz 4th order subsonic, do the following: ....
For a 14hz 4th order subsonic, do the following: ....
So to start off:
you can't ( as far as i can tell ) set any filter to lower than 20 hz on either DCX or DEQ however what you can do is:
1 - set SSF to 20 hz
2 - apply parametric boost at 20 hz at the same time
3 - apply CUT at around 25 hz or so
by playing with the parameters of these 3 filters you can get 2 and 3 to mostly cancel each other out above 20 hz but their net effect will be significant boost below 20 hz
this boost below 20 hz will interact with 20 hz SSF and the net result will be that the boost will largely get cancelled and SSF will shift down in frequency.
how much lower you would be able to push the SSF frequency would depend on the order of the highpass. you would be able to push a 6db/oct highpass much lower than a 48db/oct highpass.
To create a subsonic filter using Behringer DCX2496 or DEQ2496
Well, that's actually quite easy. The DCX does not have ability to set filters below 20Hz. While this may seem to high, it's not really. You can easily extend the actual filter by for example setting high pass filter to 20Hz, 2nd order, Butterworth. Now add a single parameteric band at 20Hz in the EQ section on the unit, set to Q of 1.5 and gain of +4 dB. This will counteract and extend the roll off, giving you an effective roll off on the 13w7 of -3dB around 17Hz and -6db around 14hz, with rapid roll off after this; exactly what you want with this 10 cubic foot cabinet tuned to about 16Hz to prevent excessive excursion under this tuning frequency.