I have D9s in a ~12x17 well-damped room with no bass issues, so I think you could make it work fine depending on what else you have in your room. Their Linear-Flow port tech works really well; they produce deep bass with lots of punch. I use them with Pass amps (X250.8 and now XA30.8) but I did purchase a 4B3 to try with them for a while and I preferred the slightly tighter and faster bass of the 4B3 with them over the X250.8. I imagine the 14B3 would really take control of them... I think the XA30.8 sounds marvelous with them although the bass did slightly soften up with the amp swap.
Thankfully, I've yet to hear them produce 'scratchy, not natural sound' too :)
Thankfully, I've yet to hear them produce 'scratchy, not natural sound' too :)