Quote Originally Posted by JoeE SP9 View Post
I just bought a Behringer DSP1124 for $99 from B&H Photo with free shipping. I ordered it Tuesday May 24 about 1PM. It arrived the next day via UPS.

It's a 12 band per channel parametric equalizer with a built in 24/46 ADC/DAC (DSP). I chose this over the the DEQ2496 which has 20 parametric bands per channel a 24/96 ADC/DAC (DSP) and is ~$60 more expensive. For my purposes 12 bands per channel are more than enough for a device that will never see a signal higher than 100Hz. Currently the DSP1124 is connected to the low pass out of my crossover and from there to the bridged Crown's that drive my subs.

Now that I have two 1U rack mount devices I pulled a Walnut Crown DC300 case I wasn't using out of the closet and bolted the DSP112 and my CX2310 (crossover) into it. They leave a 2U space open in the case. So, maybe I'll look around for a 2U amplifier for a center channel speaker that I've never gotten around to buying. The case is sitting on a black painted piece of spiked MDF between my front speakers. The amps for the speakers and subs are behind or next to their respective speakers.

To use a BFD properly you need a calibrated measurement microphone and REW (Room Equalization Wizzard). REW is available for free at www.hometheatershack.com . You have to become a member (free) to get it. Behringer and Parts Express have calibration microphones available for less than $100. Both need a microphone preamp that provides phantom power for the condenser microphone element. If you have a Rat Shack SLM analog or digital it will also work. HT Shack has the correction factors for all the Rat Shack SLM's analog and digital.

24/46 is not a slip of the finger. That's what it says in the manual.
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.