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Old 15th January 2013, 08:36 AM   #41
ODougbo is offline ODougbo  United States
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Mike,

Will Box Port II switch over to rectangle ports? - WinISD didn't like all the manipulation, but this what I came up with.

I'd like to keep the box about a 1" less deep than the TB, i.e 9".

(the extra white line is exaggerated)
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Old 16th January 2013, 09:36 AM   #42
ODougbo is offline ODougbo  United States
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A few revelations:

Both woofers TB W5 - SF W7 are about the same size (OD), so the TB box is a good example (e.g. don't want to get close to edge at front)

Using same footprint as the TB box, cut about the 1" off the back, that will make the ID height 11" (for a 13 liter box).

(the TB W5 box is 14-1/2" ID)

Going to use scrap wood and build one test box, make sure there is minimal port noise.

[W5- W7 - W BOX - How'd that happen?]
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Last edited by ODougbo; 16th January 2013 at 09:51 AM.
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Old 16th January 2013, 04:58 PM   #43
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Quote:
Originally Posted by ODougbo View Post
Mike,
Will Box Port II switch over to rectangle ports?
Box Port II doesn't have rectangular ports.

I think my Bass Box 6 can do that. I will check it out for you later. Haven't use Bass Box for a while.
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Old 16th January 2013, 07:11 PM   #44
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If you really want to get your teeth into something, you could try akabak

Tony.
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Old 16th January 2013, 08:35 PM   #45
ODougbo is offline ODougbo  United States
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Akabak? Oh Boy.

Speakers are in, nice to look at, pretty good sized magnets.

Working on test box now.
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Old 17th January 2013, 02:52 AM   #46
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Quote:
Originally Posted by wintermute View Post
If you really want to get your teeth into something, you could try akabak Tony.
Hi Tony
Thanks for the recommendation. I heard that akabak is very powerful. Trouble is I don't have the time for steep learning curve. Too much work already.

Hi ODougbo
I simulated the W17RC with Bass Box. The 2" diameter port length is almost the same, which means both are accurate.

For a rectangle port:
Height = 0.5"
Width = 6"
Length = 6.9"

A 1 inch height is not practical. Length is more than 12".
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File Type: jpg BASSBOX_13L_RECTANGLE.jpg (43.7 KB, 160 views)
File Type: jpg BASSBOX_13L_PORT.jpg (43.2 KB, 154 views)
File Type: jpg BASSBOX_13L_PLOT.jpg (75.5 KB, 150 views)
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Old 17th January 2013, 03:07 AM   #47
ODougbo is offline ODougbo  United States
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What am I tuning to? Might be good to put it in writing.

(stopped by HD picked up 12/ MDF for vent pieces)
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Old 17th January 2013, 03:10 AM   #48
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Box Tuning (Fb) = 49Hz
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Old 19th January 2013, 07:44 PM   #49
ODougbo is offline ODougbo  United States
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So going as planed. Used square vent strips just in case this is a flop (port noise).

Tuned at 43hz now and sounds fine; will cut flares in ports (vent strips) - to move tuning up to 49hz.
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Old 19th January 2013, 10:57 PM   #50
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Looking great. Are you able to check on the vent tuning?
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