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post #1 of 7 Old 06-19-2014, 09:49 PM - Thread Starter
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help with sub design

I am gearing up to build an end table sub. I have read about many builds using the Infinity 1260 with a Bash 300w plate amp. The price of those components fits my budget and the performance look to be satisfying.
I am hoping that some of you experts can weigh in with your opinions to help me design my enclosure? I am not familiar enough with winisd to model this properly. I have attempted it and winisd keeps crashing on my computer for some reason.
I am looking to have a finished size of 18"w X 24"d X 22 h. I am leaning towards downfiring because the wife wants a table with legs. So would 4" above the floor be sufficient space for a downfiring sub? Assuming 4" legs, I would have a box of roughly 16.5x22.5x16.5 internal dimensions, roughly 3.5cu ft. I could stretch the length and width a little to make the internal 18x24x16.5 and get around 4 cu ft.(a little less if I figure bracing and cone displacement?)
This will be for a combo of HT and music both.
Thanks for any input
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post #2 of 7 Old 06-19-2014, 10:23 PM
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Sealed or ported/vented?
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post #3 of 7 Old 06-20-2014, 12:38 AM
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squidpickle, I like your callsign. :-)


your form factor works good with that driver.


I'd suggest ported. a single 4" flared port like this:


http://www.parts-express.com/precisi...e-kit--268-352


will provide about 10db additional spl around tuning relative to a sealed enclosure and with that small driver every bit will help A LOT.


just make it as long as you can in your cab with about 3" of clearance from the port to the wall in front of it.


at around 15-16" that will tune your sub (4 c.f.) to about 22hz or so and give a response something like this:


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post #4 of 7 Old 06-20-2014, 12:40 AM
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"So would 4" above the floor be sufficient space for a downfiring sub?"


yes. 3" would be about the minimum for the ported version (assuming port is firing down). port can fire out the back. it doesn't matter which way the port fires.

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post #5 of 7 Old 06-24-2014, 12:49 PM - Thread Starter
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Thanks!
I will be ordering my amp before the end of the month while it is on sale. I will have to include a port in my order so I can have it shipped free.

What software are you using in that graph you show? I am trying to model using Winisd and am having no luck. Is there another program that works good?
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post #6 of 7 Old 06-24-2014, 02:03 PM
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if you are on windows 7:
winisd 0.7.0.900
https://www.facebook.com/Winisd


if you are having trouble entering driver parameters:
make sure all fields are clear, then
enter qes then hit tab, enter qms
hit tab a couple times and let it calculate qts
hit tab a few times to move to mms
enter mms, re, bl, le, sd, xmax, and pe
by using tab after entering each data, it will calculate what it needs to
i no longer get any conflicts
sometimes the specs calculated don't match exactly the manufacturer specs, but its only rounding type errors, so it is not material

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post #7 of 7 Old 06-24-2014, 02:46 PM - Thread Starter
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Yes, windows 7. I didn't realize there was a version for 7.
I downloaded that one just now. I am getting a different error now. When I try to change box volume I get "Invalid floating point operation"
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