A (dark) photo of the main listening room.
The fullrange unit is a Audio Nirvana Classic 5"
. The Bass units are Eminence Alpha 15A in an H-Frame. A pair of oddblocks drive the top end and a DIY Pass F5 for the bottom. The XO is an Ashly XR1001. The XO point is 300 Hz. The in-room response is shown below.
The baffle step rise occurs from about 400 to 700 Hz. The hole between 200 and 400 is related to the XO point and baffle step. A lower XO sounds better but the hole gets bigger. This has me thinking that I may be able to get better performance with an active 3-way crossover so I can set two different XO points for the woofer and the fullrange driver. Fortunately the Ashly unit I got is 2-way stereo / 3-Way mono, so the upgrade to 3-Way stereo would require another unit and they are not expensive. Based on the plots and different XO points I tried, my gut tells me the 5" fullrange should have an XO point of about 100Hz and the 15" about 300Hz. With the right slope that should fix the hole.
I'm not sure if I should get another of the analog ashly units or perhaps try a digital crossover like a DCX2496?