This is a studio grade piece of equipment, far better than a Mini DSP or Behringer piece. But heck it sold for $3500 new, it was always a serious piece of equipment.
This unit gives you a 2 way electronic crossover with additional stereo sub out settings. So it's basically a true 3 way electronic crossover. Has room measurement and correction capabilities. I have the calibrated mic for it. It is a pre-amp, and the remote allows you volume control as well as access to all other settings. There is an internal DAC, but it is not a USB input configuration. You can perform time alignment functions, and even measure speakers and calculate crossover points. XLR and RCA inputs and outputs.
This is a serious piece of gear. Have the full installer and owner manual for it. It will have a bit of a learning curve to use it. So its not something you will work through in 15 minutes.
Condition is excellent, no dings scratches or rubs. I have two remotes for it, one is perfect and unused. The other has typical wear from use. Do have the factory box.
If you want a quality DSP at a reasonable price, this is it!!!
MSRP $3500
Sell $700 + shipping costs and Paypal % if used.
Great Review To tell you about it.
http://www.6moons.com/audioreviews/deqx/deqx.html 
