Collaborative Tapped horn project

[tb46]

Hi KaffiMann,

It would help if you would post your Hornresp Input screen.

Regards,

[BP1Fanatic]

Originally Posted by KaffiMann

Hi.

I've only read to page 70 so far, but i have a question i doubt have been answered.

If i want to make a tapped horn, where the first 150cm is constant (not a horn), and the following 170cm is conical. Why does the frequency response in hornresp look like the path of the sound is only 170cm?

Basically, you are describing a TH with a compression throat chamber. Try using Ap1 as your constant cross section area. Lpt = 150cm. Vtc = speaker mounting plate thickness...1/2", 5/8", or 3/4". Apt = Sd or speaker cutout diameter.

[darrellh44]

Is there a consensus for this thread on which design(s) are recommended for the masses? Can someone reply with the post/page numbers (or even links into this thread)? It would be great if the OP could edit the first post to list these.

Thanks,
Darrell

[blamus]

Hi, I'm looking for Tang Band W6-1139SI TH design plans,

I've read through the volvotreter 30 and 38Hz designs, and also

Tapped Horn Subwoofer - amateur audio

and the designer told me that these are one of the first DIY TH efforts which are a little outdated by now.

Is that the case? are there better/updated designs out there for the W6?

Please point me in the right direction

Best regards

[brsanko]

Why don't you get Hornresp and Sketchup and a woofer tester and design your own? I would cost less and give better results than following someone else's design because you can give it your design priorities. That's the spirit of DIY after all. If you don't think you have that ability tell me what you're looking for and I'll design it for you.

[blamus]

I had a read on hornresp and arabak and I can see where things are going, but then i look at the folding, maybe a single or double fold I can just about see, but any more fancy than that its like doing integrals in uni all over again, and I'll need to buy a woofer tester.

But you have convinced me. It didnt take much did it!? I want to build a front loaded horn by BFM and a similar sized/priced tapped horn that is properly designed and see for myself what the differences are. I'm going to order a WT3 next week and get things started. But if I cant get the simulation working, you would really help me design it?

right now I have these candidates:

W6-1139SI 6-1/2"
Tang Band W6-1139SI 6-1/2" Subwoofer | Parts-Express.com

Audax HT240 10"
* Power handling: 160 watts RMS/225 watts max
* VCdia: 1.5"
* Le: 0.67 mH
* Impedance: 4 ohms
* Re: 2.9 ohms
* Frequency range: 49-1,150 Hz
* Magnet weight: 63 oz.
* Fs: 48.9 Hz
* SPL: 92 dB 2.83V/1m
* Vas: 1.27 cu. ft.
* Qms: 10.01
* Qes: 0.72
* Qts: 0.67
* Xmax: 7 mm
* Dimensions: Overall Diameter: 9-3/4", Cutout Diameter: 8-11/16", Mounting Depth: 4".

DIYMA 12"
* QTS: .354
* FS: 25hz
* VAS: 41.7 L
* RE: 3.6 Ohm
* BL: 22
* SPL: 84.3 dbwm
* Le: 1.3mh
* Xmax: 23mm 1 way (71% bl, 25% cms)
* Xmech: 64mm peak to peak
* Weight: 37 lbs
* Cutout diameter: 28cm
* Mounting depth: 16cm
* Driver volume: .15 cft

ACI SV10
https://www.madisound.com/store/manuals/SV10Specs.pdf

RSDC102
Re (Dcr ohms) 0.85 (in parallel)
Fo (Hz) 27.9
Sd (SqM) 0.0314
BL (Tm) 7.57
SPL (dB@2.83V) 92.6
Qms 4.04
Qes 0.461
Qts 0.414
Vas (liters) 27.8
Cms (um/N) 183.9
Mms (gms) 177.5
Power Handling (RMS) 600W
Xmax (mm) 14.8
VC (in) 2.5˝

I was thinking of just finding a good design for the W6, because I dont know how to model any of the others to compare.
I guess I would be shooting for a bandwidth around 20-100Hz, maybe just 30-80, depending on the efficiency and size. Efficiency is VERY important for me, I was told a bass horn should be at least 6db more efficient than a vented box, otherwise the extra complexity and space is not worth while.

what do u think?

[Lee in Montreal]

Hi all. Please allow me to add my current project to the many experimentations on this thread. First off, I am a huge early Kef enthusiast, so the horn cabinets had to be made with a Kef driver. I have four Kef B300 with 23Hz Fs for the purpose (on top of the other 4 already in duty). The cabinets are for home, and therefore all out SPL is not the goal. I am looking for low frequency. And "relatively" small cabinets. I looked at Cerwin-Vega's bass bins and extrapolated on their design (folded horn) but added a few spices: no sealed enclosure for the driver but a simple open labyrinth. The woomb-like portion is made fron CNC-cut layers of 1" MDF glued, stacked and compressed. Allowing to get any shape. Section is 2.5" x 14" (might enlarge to 3")





One previous project. Still developping the "heads". Speakers are tri-amped.

[Lee in Montreal]

In order to lower the production costs, I have redesigned the enclosure. Feel free to use at you own risks. Enclosure meant for home use with a 12" driver w/ 23Hz Fs. 1" MDF is used and drawing doesn't show the bracings. The light blue grid reflects a 1"/square.

[mwmkravchenko]

What did you model this enclosure with?

Mark

[Lee in Montreal]

Originally Posted by mwmkravchenko

What did you model this enclosure with?

Mark

Ah, ah. I am old school. I fabricate, I listen and measure with pink noise and tone generator. I will submit a graph of the progression of the horn (distance vs height). But if anyone wants to model it, then the specs of the driver are here.