Kalman Rubinson wrote:

Does anyone else recall a similar design from WirelessWorld in the
70s? Nixon? I'll look through my archives but I seem to remember such
along with crossover considerations.

I'd be interested in some background info on how they work - I dare say the
damping effects could be altered by changing the diameter of the opening and
the length of the tube, but I don't know what the effects would be in terms
of real-world numbers.


--
Wally
www.artbywally.com
www.wally.myby.co.uk/music