Ian if you are following the boards , are there any plans for an HP version of the in ceiling speakers.
We don't have any plans for it currently. Assuming there is a subwoofer in play in conjunction with your M3 In-ceiling it would be a pretty powerful system.
How are the tweeters attached to the main driver? Would a one off be possible or is the 6.5 modified specifically for the in ceilings.
AFAIK the challenge with making an HP version of the M3 is that the HP woofers roll off at a lower frequency than the regular woofers, making them a better fit for a 3-way than a 2-way.