MTM's and mutual coupling

[Robh3606]

Just wondering if you get the same 6db gain as with woofers?? I want to try a pair of 115h-1 at 87Db with the L200T3 crossovers set up for 93db. What do you think?? Figure it could make a fun MTM with the 115's sealed and a woofer in at 300Hz like the XPL'S.

Rob

[duaneage]

I would use 3rd order filters with tht MTM, they seem to give better polar response. JBL padded woofers with 20-30 ohm shunts across woffers after the crossover network, you could try the same thing. Bringing the total impedance sown a bit with a resistor shunt would also provide a better match for the lower impedance of the MTM setup.Use two 40 ohm 10 wat resistors in parallel across the woofer.

[Dave Zan]

Just wondering if you get the same 6db gain as with woofers?? Rob

Depends on how close they are.
They will couple when they are less than about a quarter wave apart.

[Jan Daugaard]

I once asked the same question and got an excellent reply: http://audioheritage.org/vbulletin/s...ustic+coupling

[Robh3606]

Thanks

Rob