A single Neo 8 will have limited vertical dispersion and is really best suited for a line source.
Oh, that's right.

I guess I was looking at your N1,N2x, etc, and thinking of that type of speaker with the Neo 3 PDR's.
I'm thinking a dome tweeter will not have a low enough frequency response to match well with the M165 XBL
2.
The impedance of these woofers are really low so you will need to run two of them in series. Sensitivity is going to be real low too. It will be in the 83 to 84db range using them in a monitor.
I looked around on GR Research and Parts Express...doesn't seem like I'm going to find a tweeter to match that low of an sensitivity.
So, maybe these woofers would be better used as paper weights?