Zaph BATMM?

[sdclc126]

Just curious - if I wanted to make the BAMTM into a TMM (just think they look cool), what would I need to change on the crossover, if anything?

Thanks.

[Salas]

Much important things actually, and without measuring it and simulating it again, you are heading to uncharted waters I am afraid.

[sdclc126]

Understood - now, if I wanted to go hog wild & build some big towers, maybe MTMMM, or MMTMM? Still same issues?

[ruerose]

Best to find a kit that matches your end result desires. Modifing existing kits (even just cabinet dimensions) requires changes that you have to account for in the crossover.

Take a look around RAW acoustics web site for some larger kits.

I wouldn't modify John's kits. Jesus kills a baby kitten everytime someone changes his designs.

[Salas]

Those swapped configurations must be measured on tweeter axis that you have to aim to your seated ear level. As you understand each driver is going to give a different response and dispersion out of its own axis when in a new position relative to a new tweeter axis. The box diffraction is going to alter for each new center too. By swapping them around and using the same crossover network you just destroy all intended FR and lobes for the initial configuration. Each geometrical configuration is a study on its own. For such things you better have a digital processor and many amp channels so to be free and quick in experiments, calibrated measurement equipment also, so to know what's happening. For classic stereo setup you need to build 2X specialized passive networks (one for each geometrical version), using measurements and simulations as always.

[sdclc126]

Thanks for all the feedback - you won't get any argument from me on it!

I'll stick with the original - just gonna make it a floorstander - another cosmetic preference. In a small space anyway so it'll be more than adequate.

[joe carrow]

Originally posted by sdclc126
Understood - now, if I wanted to go hog wild & build some big towers, maybe MTMMM, or MMTMM? Still same issues?

One thing that you *can* do is make a bass bin with the BAMTM. Just don't change the original project, then add an active crossover between it and a big box of (sub)woofers acting as a stand. A pair of ported 8"s or 10"s crossed around 100 to 300 hz would increase the bass and dynamics of the whole system.

[RJ]

Pete Schumacher already has a crossover and design for a TMM;
http://s12.photobucket.com/albums/a203/pete_schumacher/

Pete can be reached on the PE board;
http://www.pesupport.com/cgi-bin/config.pl

I've built the MTMWW's and the TMWWWW's usin the DA175's.
Great sounding speakers!

[sdclc126]

Hi Joe - I currently have a small sub but have considered the integrated sub approach; I actually would like to ditch the separate sub idea altogether at some point and have everything built into the mains.

RJ - thanks greatly for those links - that's what I was looking for.