[Regalma]

I have an Audio Control brand Richter Scale bass cross over and equalizer. This is the Series Three version. It includes the microphone, and manual. Currently I have resistor packs for cross over points at 66, 45 and 116 Hz. You can easily create your own crossover points with resistors and a DIP socket (a bit technical but easy to do, instructions in manual). I could create a resistor pack at whatever frequency you want for a small price.
Rather than explain everything this component can do I have included scans of the relevant pages from the manual. The included microphone is used to calibrate the equalizer.
I am asking $500 plus $50 shipping. Free pickup in Santa Cruz, CA area.