DAX Active Crossover for Apogee Speakers (Diva, Duetta, Caliper Signature). I bought this for use with my Diva's (which are also listed - I am downsizing), but never used it as I was happy with the results from my custom-built crossovers and decided to avoid the complexity of bi-amping. DAX is in excellent condition, but will rate it as 7 to avoid any disappointment. In response to a question, the power supply is included - system is shown powered up. I'm not the best photographer (as you can see), but so it goes.