Slot Ported 18" Subwoofer Flat Pack - Page 3 - AVS Forum | Home Theater Discussions And Reviews
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post #61 of 67 Old 03-31-2016, 10:13 PM
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Does anyone know the size of the port for the 18" cube? Is it 18" wide x 2.75" high x 42" long? I assume the 15" cube is the same except 15" wide x 2.75" high x 30" long


Trying to figure this out in Winisd is a pita. Unless I'm doing it all wrong. The numbers just don't seem to match.

Marantz 7702mk2, Panasonic 8000 w/ 130" AT Screen HTPC w/48 tb
DIY QSC SC-2150 L,C,R (10) QSC SR-8101 sides, rears & atmos/dst-x
DIY (4) Fusion Tempest, 88 Special
DIY (6) JBL cx12" UM-15", SI-18" subs, BFM Tuba HT, Dayton MKIII 15", (2) PA460 mbm
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post #62 of 67 Old 04-01-2016, 05:45 AM - Thread Starter
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I can't recall exactly what they are right now, but the internal volume and the ports are exactly the same as the Stonehenge, which was tested with a mic (I think MTG90 did that) and showed tuning of 18.7hz or something like that. Using Winisd to figure slot port tuning doesn't work very well because it doesn't take into account where the port actually is inside the box.....which has a pretty big effect on the tuning.

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post #63 of 67 Old 04-01-2016, 11:14 AM
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Quote:
Originally Posted by Erich H View Post
I can't recall exactly what they are right now, but the internal volume and the ports are exactly the same as the Stonehenge, which was tested with a mic (I think MTG90 did that) and showed tuning of 18.7hz or something like that. Using Winisd to figure slot port tuning doesn't work very well because it doesn't take into account where the port actually is inside the box.....which has a pretty big effect on the tuning.
OK. That must be screwing things up. In order for to me to see 18hz. the box size was 24x27x34? Maybe I have the incorrect data for my subwoofer SI-18.

Marantz 7702mk2, Panasonic 8000 w/ 130" AT Screen HTPC w/48 tb
DIY QSC SC-2150 L,C,R (10) QSC SR-8101 sides, rears & atmos/dst-x
DIY (4) Fusion Tempest, 88 Special
DIY (6) JBL cx12" UM-15", SI-18" subs, BFM Tuba HT, Dayton MKIII 15", (2) PA460 mbm
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post #64 of 67 Old 04-02-2016, 02:07 PM
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What is the SPL at tuning?

Marantz 7702mk2, Panasonic 8000 w/ 130" AT Screen HTPC w/48 tb
DIY QSC SC-2150 L,C,R (10) QSC SR-8101 sides, rears & atmos/dst-x
DIY (4) Fusion Tempest, 88 Special
DIY (6) JBL cx12" UM-15", SI-18" subs, BFM Tuba HT, Dayton MKIII 15", (2) PA460 mbm
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post #65 of 67 Old 04-02-2016, 02:17 PM - Thread Starter
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That depends on the driver and power you're using.

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post #66 of 67 Old 04-05-2016, 06:17 PM
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Anyone get their flat pack yet? I've got all my other parts hidden from the wife and ready to go in...just need the flat pack
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post #67 of 67 Old 04-07-2016, 07:14 PM
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Hey Guys, I'm a newb here and thinking of getting this ported sub box, would a SI 18 DS4 work in this box, any other driver reco's, I know of the Dayton 18" RS, thanks guys, appreciate the new person help............
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