I finshed my second scanspeak 23w sub. These are really nice for music good clean bass to 30hz. It is f10 at 20hz but most of the music I play only needs 35hz. I will post the entire project in a few days. This has a pair of DIY SKA-AUDIO GB150 MONOBLOCKS. FOR THE JORDANS AND A DIY SKA-AUDIO GB150 STEREO FOR THE PAIR OF SCANSPEAK SUBS. A RANE 22 2 way active crossover does the hi and low and a SOLEN 200UF CAP extra for the jordanxr92s. I am feeding music to it with a Alexis masterlink9600. Very nice piece of gear. It sounds really good.