Dual 10" coupling

Hi!

 just use one 10"  or use a coax driver, problem solved. Using two drivers is only useful when you desire cancellation, like horizintal line array ellements do . If its a vertical box you would never locate the hf in  between two drivers as you create twice the problems above and below the vertical axis and practicality dictates that you need the hf as high as possible if ground stacked. Copy something good already available , These days, I  think you will be dissapointed if you to try to reinvent the wheel.


Edited by Tinnitus Rex - 24 August 2021 at 8:52pm

Those are horn loaded.........................did I miss something

Im thinking of crossing the bottom one 140-500 with passive high qual Low pass filter so 17,7cm cone to cone and the upper one just see how it does the high freq stuff, if I need to cross lower , I Have  BMS 1" 4550 :800-up to 20kHz and large faital tactrix horns..

MTM mid tops (with the tweeter in the middle) have a horizontally alligned dispersion characteristic which makes them useful for certain applications. I like their in your face when you stand up in front of the speakers, foccussed sound for small venue PA system.

JonB67 wrote: There's some interesting discussions and info on mtm, if you google d'appolito array/arrangement/configuration you should be able to find some more thoughts on its pros and cons.

D’Appolito does not apply to any old MTM configuration. It requires specific fourth order slopes to broaden the vertical coverage and maintain phase coherency. That dictates spacing and loading somewhat.

The real benefit of MTM is the vertical polar response. Especially if you’re able to design the system based on the use of all-pass or FIR filtering (based off anechoic listening window data) to adapt the off-axis response.