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Help designing cabinet for Tectonic TEBM65C20F-8
Help designing cabinet for Tectonic TEBM65C20F-8
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Old 4th March 2016, 10:45 PM   #1
holmesc is offline holmesc  Australia
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Default Help designing cabinet for Tectonic TEBM65C20F-8

Hello, I'm new to speaker design and would like to start with with a simple full range driver.

Could someone help me work out the optimal cabinet and port dimensions to suit this driver?

http://www.tectonicelements.com/wp-c...BM65C20F-8.pdf

Would a sheet of 1/4" MDF and length of PVC drain pipe be suitable?

thanks
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Old 5th March 2016, 07:34 AM   #2
S4m is offline S4m  Germany
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I built a transmissionline with two of these drivers in parallel. They are used for my hometheater and not for hifi. What are your design goals?
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Old 5th March 2016, 08:09 AM   #3
holmesc is offline holmesc  Australia
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I just want a small pair of bookshelf speakers with reasonable midbass (I'm not expecting miracles). I used a speaker calculator but the box volume came out to 18L, which surely cannot be correct?!

Similar to these perhaps: http://www.theloudspeakerkit.com/lsk...ni-speaker-kit

Last edited by holmesc; 5th March 2016 at 08:12 AM.
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Old 6th March 2016, 08:55 AM   #4
S4m is offline S4m  Germany
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http://http://www.spectrumaudio.de/bausatz/beeper.html a simple BR. Good for PC speakers. A better enclosure is the TQWT http://http://www.lautsprechershop.de/index_kits_de.htm if you are interested i may help you.
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Old 6th March 2016, 10:43 AM   #5
sreten is offline sreten  United Kingdom
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Hi,

2L to 3L sealed and well stuffed is as good as gets with a Qts=1.1, Fs=90Hz,
Vas=1L driver. Ideally drive it with a AV amplifier with adjustable high pass.
Use at least 1/2" MDF for the cabinet.

rgds, sreten.
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Old 6th March 2016, 11:46 AM   #6
holmesc is offline holmesc  Australia
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Hi S4m, those links don't work.

sreten, would a ported box, properly tuned, help improve the bass vs. sealed enclosure? I don't have any AV receivers (all my amps are DIY and most my own designs) but can easily construct a HPF.
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Old 6th March 2016, 10:15 PM   #7
S4m is offline S4m  Germany
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Sorry...All Products :: P Series :: P1, Strassacker: Lautsprecherbausätze (Lautsprecherboxen-Bausätze) und Lautsprecherlösungen, Beeper Bausatz im Angebot bei SpectrumAudio-Spezialvertrieb für Breitbandlautsprecher und mehr the second link is the most promising :-)
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Old 6th March 2016, 10:30 PM   #8
S4m is offline S4m  Germany
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Oh ok the second is not really working. I tried it :-\ Will send you a PM
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Old 6th March 2016, 11:15 PM   #9
richie00boy is offline richie00boy  United Kingdom
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Help designing cabinet for Tectonic TEBM65C20F-8
Qts is too high for a ported box. Sreten was hinting at that...
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www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
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Old 7th March 2016, 02:12 AM   #10
holmesc is offline holmesc  Australia
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Ok, I don't know anything about speaker design but I'm hoping to learn.
The reason for my question is that an Australian kit manufacturer uses this driver with a ported enclosure, but of course that don't mean they are going about it the "right" way.

LSK M3 mini speaker kit

According to this article (Enclosure Dilemma) if a speaker has Efficiency Bandwidth Product > 122 then it is best suited to ported enclosure and < 50 best suited to sealed cabinet.

EBP = Fs / Qes

For this speaker EBP = 92 / 1.31 = 70, which seems to indicate that it can be used in either a sealed or ported enclosure.

What am I missing?
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