I noticed they were on sale ($45) Maybe 2 in one rectangular box oriented vertically with an o-audio 500w amp for less than a $500 sub?
Here is the spec.
The DPL-10 is a dipole specific driver with class-leading output and linearity. Using the XBL^2 motor technology to provide a clean 13mm X-max.
FEATURES
* Low distortion XBL^2 motor optimized for low inductance & flat BL curve.
* 10" Driver Optimal for dipole operation.
* Single 8 Ohm Voice Coil.
* Spring loaded terminals for easy hookup.
SPECIFICATIONS
* Fs: 23 Hz
* Re: 6.5 Ohms
* Qms: 4.7
* Qes: .91
* Qts: 0.76
* Mms: 99g
* Cms: 0.47 mm/N
* Vas: 73L
* Sd: 333 cm^2
* Vd: 1.26L
* BL: 10.2
* X-max: 13mm
* Pmax: 300W
* SPL: 81.7 db/1W/1M
