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Multi-Way Conventional loudspeakers with crossovers

Beyma TPL-200H
Beyma TPL-200H
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Old 2nd April 2016, 06:51 PM   #21
enzoastro is offline enzoastro  United Kingdom
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Is there a chance that what you miss with the compression drivers is distortion? Low distortion drivers always sound quieter running at the same db to me, a little distortion on some music sounds good too :-)
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Old 2nd April 2016, 07:49 PM   #22
System215 is offline System215  Canada
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Originally Posted by Adhoc1 View Post
Thanks for the info. Too bad your first crossover try just cost you money. Still, I think such info may be just as valuable as successes for those who are thinking about similar builds.

As you run it now with Kranis’ new filter, is it with decreased volume as sealed or ported box with a changed higher tuning?
As of right now, the box remains just as I built it—about 2 cu. ft. with a port tuned to around 45 Hz. Kranis suggested there were a number of solutions: (1) make a new, larger box with appropriate box tuning; (2) seal the existing box (to simulate this, we stuffed the ports with foam damping material); (3) reduce the length of the existing port to raise the tuning frequency to circa 60 Hz; or (4) keep the box just as I made it, but run it full range; that is use the electronic crossover only as a low pass for the 18" subs.

Kranis's measuring equipment and our ears agreed that solution (4) yielded a smooth integration of the 12" AE and the 18" Eminence, but only if we used a 12 dB/oct. L-R low pass filter, as a 12 dB/oct. Butterworth filter produced too much mid-bass output. More to save time and money than anything else, I opted for the "full range" solution.

At some point I mean to try the other solutions to see which yields the best results, but right now I'm enjoying the speakers too much to bother!

Hope this clarifies exactly what I did. . .

Regards, Joel.

Last edited by System215; 2nd April 2016 at 07:52 PM.
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Old 4th April 2016, 02:32 PM   #23
Adhoc1 is offline Adhoc1
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Yes it did. An idea could be to seal the ports and add closed cell styrofoam to decrease the volume and try them out as sealed cabinets at around 0,75 ft³, if your sub works well up to about 110 Hz. (A block of 1,25 ft³ is easy to fix, then breaking it apart so the scrap material fit into the cabinet.)
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Old 12th July 2016, 03:26 PM   #24
manninen is offline manninen  Finland
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http://www.homecinema-fr.com/forum/r...es/file/157465

French guys had tested tpl200h
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Old 12th July 2016, 08:46 PM   #25
Face is offline Face  United States
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Old 13th July 2016, 01:30 AM   #26
chrapladm is offline chrapladm  Australia
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^^^^^Same for me also.

I am curious to know if he 200 offers anymore usable frequency range over the 150. I know it can take more power so I am hoping that this means maybe it can sound better at home at a lower XO.
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Old 13th July 2016, 04:15 AM   #27
manninen is offline manninen  Finland
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sorry don´t know what happened

homecinema-fr TPL200h test

Last edited by manninen; 13th July 2016 at 04:18 AM.
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Old 13th July 2016, 04:48 AM   #28
Face is offline Face  United States
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Thank you.
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Old 13th July 2016, 06:07 AM   #29
Flaesh is offline Flaesh  Russian Federation
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Thanks!!
(For comparison with CD)
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Old 14th July 2016, 03:15 AM   #30
frangus is offline frangus  Australia
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Not very useful to compare a midrange driver to a tweeter

Good measurements though
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