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ROAR with Helmholtz front resonator
ROAR with Helmholtz front resonator
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Old 1st October 2018, 09:22 PM   #11
freddi is offline freddi  United States
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ROAR with Helmholtz front resonator
- pretty cool (maybe it can be K-ized?)

a bit larger with Dayton's 14mm xmax 12" subwoofer (forgot to hit lossy LE)

Click the image to open in full size.
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Old 4th October 2018, 06:41 AM   #12
Circlomanen is offline Circlomanen  Sweden
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Quote:
a bit larger with Dayton's 14mm xmax 12" subwoofer
It looks really nice!!

Have you made a drawing to determine if it is a buildable and feasible design??
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Old 4th October 2018, 07:47 AM   #13
freddi is offline freddi  United States
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ROAR with Helmholtz front resonator
sure haven't ------ it might be "buildable" (?) as the numbers were directly scaled from your prototype using the "resize" tool
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Old 5th October 2018, 04:24 PM   #14
Circlomanen is offline Circlomanen  Sweden
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Right now this 6th order TPBP is placed under my computer table, crossed over to a pair of Dayton PS95-8 in 12 liters closed boxes, 48 dB/octave with a MiniDSP 2X4HD. With a few points of some gentle EQ and 1 ms delay, it sounds really good!!!

Music tends to be reproduced with a great punch and energy, making it very addictive and fun. The 6th order TPBP combine seamless with the Dayton fullrange drivers, making them sound much more powerful and extended. The TPBP integrates well without any hint of drawing any attention to itself.

I am very happy with this cheap first prototype. I even think it sounds nicer then the ROAR12, which tends to overpower and exaggerate everything when used indoors. The ROAR12 always acts like a furious Caterpillar D9, even when called upon to reproduce delicate music.

I guess the Helmholtz frontchamber softens the sharp edges (the non linear nature of music) somewhat, whereas the ROAR12 tends to exaggerate the sharp edges in music making the non linearity more pronounced.
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Old 12th October 2018, 08:04 PM   #15
BP1Fanatic is offline BP1Fanatic  United States
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"The ROAR12 always acts like a furious Caterpillar D9, even when called upon to reproduce delicate music." Hence, ROAR!

A very creative way to design a BP6! I thought TD's BC enclosure was a FLH?
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Old 12th October 2018, 08:16 PM   #16
freddi is offline freddi  United States
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ROAR with Helmholtz front resonator
The 1936 RD-8 was cool enough to star in a movie

Earthworm Tractors : Free Download, Borrow, and Streaming : Internet Archive
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Old 13th October 2018, 12:36 PM   #17
snappyturtle is offline snappyturtle  United States
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Quote:
Originally Posted by BP1Fanatic View Post
"The ROAR12 always acts like a furious Caterpillar D9, even when called upon to reproduce delicate music." Hence, ROAR!

A very creative way to design a BP6! I thought TD's BC enclosure was a FLH?
The BC enclosure is a FLH. but this method of enclosure came about from trying to reverse engineer or guess at what that enclosure was. Caught the attention of JAG if I recall correctly.
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Old 13th October 2018, 10:51 PM   #18
UPitt is offline UPitt
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Although this is just a single driver prototype of the design, do you have any plans for a larger box loaded with 2 or 4 subwoofers? And how would you model this (with the multiple long internal "ports" and the shared "chamber 1" volume and port) in hornresp?
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Old 17th October 2018, 11:24 AM   #19
Circlomanen is offline Circlomanen  Sweden
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Quote:
A very creative way to design a BP6! I thought TD's BC enclosure was a FLH?
Thanks! It is a very simple and easy way to design and build a BP6, but the quarter wave based first section makes it sound much better then pure helmholtz based BP6.

Yes, my current understanding of the BC series is that it is some kind of FLH/BP4 hybrid.

Since I wanted a very easy to build small "shallow mount" kind of bass box I used a non expanding tapped pipe as the first section.

Quote:
do you have any plans for a larger box loaded with 2 or 4 subwoofers?
Ofcourse!!!!

I am working on several variations of this design, and a 4 woofer version should be quite fun and capable.
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Old 17th October 2018, 03:42 PM   #20
Circlomanen is offline Circlomanen  Sweden
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Quote:
And how would you model this
With the BP6 simulation tool in Hornresp. You can see the way I simulate in post #3 above.

Cheers,
Johannes
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