Rather than the idea I mooted recently about making compact tranmission
lines using Kef B139s and driving them with a filtered signal to provide
lift where the speakers roll off, I have another option - I have a total of
four B139s, two in the existing speakers, and two bought as spares and/or
drivers for the future bass units.

Am I right in thinking that some sort of push-pull set up will give me a
shallower roll-off for a given size? What design approaches are there, and
how do they compare?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.