I built these open baffles per the plans on JE Labs website (http://members.myactv.net/~je2a3/open.htm).  Because the 755C only goes to about 15k I added a tweeter on top.  A friend (thanks Jeffrey) had a pair of these Seas H398 sitting in his closet doing nothing so he offered them to me.  I only have a 1.5 uF cap on the tweeter.  This combination sounds surprisingly good, doesn't have the dynamics of horns but is very smooth.  The 755C plays a lot lower than I would have thought, I need to get the SPL meter out and check to see how low it is going in my den.

This speaker is very low WAF and is only temporary till the listening room gets finished.