On 12/10/2014 07:46 AM, gregz wrote:

You could try a little series resistance on the woofers to push up the Qts
and be more suitable for closed box?


Interesting. This might actually reduce the influence of the amp and
cables. I have one book which I cannot find which was obsessed with
measuring the amp impedance and matching the speaker to the amp.

This probably will not help you, but here was my quest. 15 years ago ?
http://www.pitt.edu/~szekeres/center.htm

Not far from what I have in mind. Thanks. Might go push-pull as there
seems to be pros and the cons are that they are a little ugly.