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-   -   open backed Tapered TL? reverse-taper-into-BIB? zero-net-taper-1/2 wave resonator? (https://www.diyaudio.com/forums/full-range/162967-tapered-tl-reverse-taper-bib-zero-net-taper-1-2-wave-resonator.html)

mondogenerator 12th March 2010 02:02 AM

Quote:

Originally Posted by GM (https://www.diyaudio.com/forums/full-range/162967-tapered-tl-reverse-taper-bib-zero-net-taper-1-2-wave-resonator-post2115248.html#post2115248)
Don't forget to combine the driver/port responses, HR doesn't automatically do it as other programs do.
GM

um.....how do i combine the cone response and the horn mouth response? cant seem to figure that out......:confused:

GM 12th March 2010 03:19 AM

In the SPL RESPONSE window click on TOOLS, then COMBINED RESPONSE or use CTL + O. This will open a pop-up window that let's you dial in the path-length difference between the driver's front radiation and the vent's on the rear to the listening position. Fill it in, click OK and it will calculate/display it.

See also Pg. 15 of the HELP file.........

GM

mondogenerator 12th March 2010 06:29 PM

Quote:

Originally Posted by GM (https://www.diyaudio.com/forums/full-range/162967-tapered-tl-reverse-taper-bib-zero-net-taper-1-2-wave-resonator-post2116062.html#post2116062)
In the SPL RESPONSE window click on TOOLS, then COMBINED RESPONSE or use CTL + O. This will open a pop-up window that let's you dial in the path-length difference between the driver's front radiation and the vent's on the rear to the listening position. Fill it in, click OK and it will calculate/display it.

See also Pg. 15 of the HELP file.........

GM

righty ho!

well after a bit of tinkering, i have come up with this:

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to my eyes it doesnt look great but considering its using a driver i have planned for TL at the mo, and that its only 87dB/W, the flatness and SPL gain was rather compromised. mind you i am primarily looking at this design from the stand point of a small as possible sub app, and i havent tried other drivers which may be much much better.whats the opinion of others?

GM 13th March 2010 02:21 PM

1 Attachment(s)
Assuming this is a 2pi space sim, then it probably has enough BSC to be damped without losing too much and the high Q peaks will be ~gone, so looks good enough to try. If 1pi or 0.5pi it will probably require a lot of stuffing to keep from sounding 'boomy'.

FWIW, here's a corner loaded example I just calc'd for an AE AV12-x. Damped and 1/3 octave smoothed, IME its response above ~100 Hz will be a fairly smooth +/- 2-3dB 'ripple' till it begins to decay away:

GM

peterbrorsson 14th March 2010 09:18 AM

GM,
How big is the box with the AE?

Peter

GM 14th March 2010 03:19 PM

HR says 90.247 L net.

peterbrorsson 14th March 2010 06:33 PM

...hmm, would be a impressive sub if crossed at ~80Hz. Btw, anyone knows if AE have dealers in Europe? Have been searching without result.\

Peter


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