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opinion about DIY 2x12" |
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el_dj 
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Joined: 30 November 2007 Location: Denmark Status: Offline Points: 176 |
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 Topic: opinion about DIY 2x12"Posted: 27 August 2015 at 10:41pm |
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trying to model a 2x12" enclousure.
any recommandations, errors ?      any comments appreciated. Regards Daniel
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Old twat, with an interest in light & sound
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all bass
Old Croc 
Joined: 11 October 2012 Location: the Netherlands Status: Offline Points: 1845 |
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Posted: 27 August 2015 at 10:50pm |
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The box W driver??
There are already some nice 2x12 designs out there which have been measured and proven. |
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https://www.instagram.com/my_modular_journey/
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el_dj
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Posted: 27 August 2015 at 11:21pm |
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yes .. but looking to learn how to make an enclosure.
btw.. what are does designs that have been measured and proven ? |
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Old twat, with an interest in light & sound
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PavelP
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Posted: 28 August 2015 at 12:38am |
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It's ok, el_dj. As for me port is too big. Normal port length for this tuning frequency and volume is about 25cm with smaller port area. You could try both on prototype.
Edited by PavelP - 28 August 2015 at 1:07am |
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el_dj
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Posted: 28 August 2015 at 11:06am |
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Thanks for the input PavelP
i tried something else... but vent mach vent fast up in the red. but i am getting more lower frequency ? i also believe that you should not tune lower than FS ?? regards Daniel    |
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Old twat, with an interest in light & sound
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DMorison
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Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1740 |
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Posted: 28 August 2015 at 1:05pm |
If you're planning on using it with subs, you may not need it to be that big, or tuned so low. If you are using it without subs, you'll probably run out of excursion way before thermal power handling. You'll need to correct your driver file before you check that as you've put the relevant dimensions in the wrong units - Xmax should be 6mm (or 0.006m), Sd 510cm^2 & dia would be closer to 25.5cm, as it's the effective moving diameter that counts, not the chassis size for modelling. HTH, David
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PavelP
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Posted: 28 August 2015 at 9:11pm |
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Look it's very easy. Changing port parameters you can make response the same in the same box volume: if you shorten it -- make it's area smaller to reach same response. That's all. Your first graph looks as it have to be. It's very good for 2x12 to work 40hz -3db, you don't need it lower course of relatively small excursion. In my opinion sub designed to work 1 per side have to have flat response in 1/2P.
I don't know this program. Have you tried BassBox6? |
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el_dj
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Posted: 29 August 2015 at 1:36pm |
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WinISD Beta |
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Crashpc
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Posted: 30 August 2015 at 7:35pm |
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If you don´t want this to be a subwoofer, I see no big reason to go 2x12" these days. Mighty powerfull single 12" with powerfull 1,4" driver (possibly the same one as the one for 2x12") will do that, and for the bass, go with dedicated subwoofer. It will ease your life for not so much more money. Cheapo 15" standing on the ground with cheapo amp will beat 2x12" solution any day, and those speakers will be all relatively small and mobile.
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Nikon and Canon people should not be married to each other. Why did you let this happen?
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el_dj wrote: