Best midrange to pair with Beyma TPL-150

[angeloitacare]

Someone will visit me the next couple of weeks, and maibe buy my big horn rig.
I am thinking about what could come next; i would get rid of horns, and build a direct radiator system, and use the Beyma TPL-150 as the core driver of a new system. I am thinking about a lower midrange driver, which would cover the range from 150hz to 1,5khz, and bass below. What would you suggest to be the best driver to mate with the Beyma's ? I think a MTM would be great. AE12TM ? 8" PHL's ? whatelse would you suggest ?

Angelo

[meister_gue]

Are you going to use normal TPL-150 or the TPL-150H?

I played the TPL-150H together with 10", 12" and 15" drivers, and my favourites are Beymas 10Mi100, 10G40, 12G40 and 15P80Nd with crossovers between 1kHz and 1,5 kHz.

[angeloitacare]

hi Meister Gue

have you tried also speakers from other brands, like PHL, for example ?
i would use a wave guide made by myself, with a profile similar to the original one. Here one i am making right now , which i intend to use with horns:

[meister_gue]

have you tried also speakers from other brands, like PHL, for example ?

No, I have not, as I can get Beyma chassis at a quite good price. But I've heard it in Systems using other drivers, like B&C, BMS and Faital. The B&C was a 8" midrange and was great, but not that I would prefer it to the Beymas.

Maybe my first choice at the moment is the 15P80Nd crossed at 1,1kHz (passive). It sounds great and has amazing dynamics and super clear midrange. I hope that I can try the new 15P80Fe soon, as it looks a bit better than the 15P80Nd on paper.

PHL is also one of the brands I need to try, but their driver cost more than I can afford at the moment, after buying TPLs

Your waveguide looks really great! How big is it?

[angeloitacare]

Originally Posted by meister_gue

Maybe my first choice at the moment is the 15P80Nd crossed at 1,1kHz (passive). It sounds great and has amazing dynamics and super clear midrange.

interesting. Here they use it:

AVforum.no - AVnytt : TangenAVdesign InConcert Miles (DIY-kit - Beyma elementer - 30Hz-25kHz - 103dB - 60KG)

Your waveguide looks really great! How big is it?

It has 60cm diameter, and will replace Vitavox S2/LeCleac'h - Coral H104/ Aluminium wave guide.



The Beyma sounds already now, without wave guide, much better than S2/H104.

I hope getting a better low end with the wave guide, below 2khz.

[ScottG]

Originally Posted by angeloitacare

Someone will visit me the next couple of weeks, and maibe buy my big horn rig.
I am thinking about what could come next; i would get rid of horns, and build a direct radiator system, and use the Beyma TPL-150 as the core driver of a new system. I am thinking about a lower midrange driver, which would cover the range from 150hz to 1,5khz, and bass below. What would you suggest to be the best driver to mate with the Beyma's ? I think a MTM would be great. AE12TM ? 8" PHL's ? whatelse would you suggest ?

Angelo

At a reasonable price - the PHL 3040.

[paulspencer]

I might at some point do something similar. My first choice would be AE TD6M. Next would be B&C 8PS21, a really nice driver and it should work fine with a 1.5k xo. An MTM with either is about 97 db and I'd be tempted to try a waveguide on the Beyma.

[LineSource]

Originally Posted by angeloitacare

i would build a direct radiator system, and use the Beyma TPL-150 as the core driver of a new system. I am thinking about a lower midrange driver, which would cover the range from 150hz to 1,5khz, and bass below. I think a MTM would be great. Angelo

Hi Angelo,

Doug's thread "10" MTM with NeoPro5i Ribbon - Build Thread" is a good reminder of dispersion and lobing limitations in an MTM when the center-to-center spacing is greater than half the crossover frequency wavelength.

"1. Unacceptable vertical response caused by the MTM arrangement of the TD10M drivers.

The drivers ended up being spaced about 18” apart C-C to make room for the NeoPro5i in between. That 18” spacing corresponds to a wavelength of 750Hz which means the first serious null would be around 1500Hz. If you take a look at the vertical response of the two TD10M drivers in their MTM arrangement, you’ll see the severity of the problem. At just 15 degrees off axis, there’s a 20dB dip at 1500Hz which is completely unacceptable. Things only get worse from there, with a plethora of peaks and nulls as you move farther off axis."


If you can accept ~94db/watt SPL efficiency, a TMW with an 8" midbass and 18" woofer crossed at 1,500Hz and 150Hz is one proven topology. The TPL-150H horn is listed at H=80 degree, V=30 degree dispersion and would provide a tight C-to-C physically spacing to the midrange. A custom built 90 x 40 constant directivity horn would be the classic home disperions pattern.

The price on my favorite midrange soared with NdFeB prices, and I have not tested any others that I would recommend. I favor 8" mid/full range with Mms of 9-10 grams and Qts ~0.37.

[meister_gue]

AVforum.no - AVnytt : TangenAVdesign InConcert Miles (DIY-kit - Beyma elementer - 30Hz-25kHz - 103dB - 60KG)

I would love to hear that!!!

MTM with such a big waveguide will cause a lot of problems. Maybe try a MMT, if you really need two mids.

What sub is planed?

[angeloitacare]

Originally Posted by meister_gue

I would love to hear that!!!

MTM with such a big waveguide will cause a lot of problems. Maybe try a MMT, if you really need two mids.

What sub is planed?

The germans use MTM with the Beyma :

Hornet by Michael Weides




http://www.roehren-und-hoeren.de/php...er=asc&start=0



There are a few 10" high efficiency drivers, which do over 100db/wm. So just one could mate well with the Beyma.

Eventually a design , using on top a 10" lower midrange, below TPL-150 at ear level, with wave guide, and on the floor a 15" or 18".........