Flexunits 10 A 77 25 10 asks for about 50-liter volume, whether you prefer sealed or ported system.
It means firm bass performance with good extension and low distortion. The P/P cone expresses subjectively high output, but still with control and high dynamic.
For higher sensitivity and smaller box-volumes, ask us to build in one of the bigger magnets. Possibilities can be found in the price-lists.