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open backed Tapered TL? reverse-taper-into-BIB? zero-net-taper-1/2 wave resonator?
open backed Tapered TL? reverse-taper-into-BIB? zero-net-taper-1/2 wave resonator?
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Old 12th March 2010, 02:02 AM   #11
mondogenerator is offline mondogenerator  England
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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......
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Old 12th March 2010, 03:19 AM   #12
GM is offline GM  United States
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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
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Old 12th March 2010, 06:29 PM   #13
mondogenerator is offline mondogenerator  England
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Quote:
Originally Posted by GM View Post
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?
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Old 13th March 2010, 02:21 PM   #14
GM is offline GM  United States
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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
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File Type: gif AE AV12-X small Klipsch style corner horn.gif (21.2 KB, 96 views)
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Old 14th March 2010, 09:18 AM   #15
peterbrorsson is offline peterbrorsson  Sweden
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GM,
How big is the box with the AE?

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Old 14th March 2010, 03:19 PM   #16
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HR says 90.247 L net.
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Old 14th March 2010, 06:33 PM   #17
peterbrorsson is offline peterbrorsson  Sweden
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...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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