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Old 25th January 2014, 10:20 AM   #1
Thabto is offline Thabto  Italy
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Cool HELP with FIRST DIY Sub Project

Hi
I have made my first diy sub build, but I am having trouble getting deep bass. All I hear is mid bass. I bought a low end 10" Infinity sub-woofer driver and made a 1.45 cubic ft box for it using supawood. Apparently no Thiele/Small specifications came with the driver. Its in a sealed box and I didn't put any damping material inside, could this be the reason? Or maybe I need to change to a ported design. What port size would I require? TIA. Let me know. I just want it to play decent bass.
Almost forgot to tell that I am using a car amp for testing purposes.
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Old 25th January 2014, 04:58 PM   #2
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Sealed boxes won't put out much low end without some eq.

Here's something that'll get you on track with the cabinet you have.

ESP - The Linkwitz Transform Circuit
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Old 25th January 2014, 06:03 PM   #3
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You really do need those T/S parameters! Just putting a driver in an enclosure will not get you the best performance. One thing you will discover right off the bat is if the driver is suited to a ported or sealed enclosure. Then you can go on to the calculations/simulations to determine the enclosure size, port or not, Fb, -3Db down numbers & several other factors. Further, you can model the performance to see just how well your chosen driver will perform at its best. Often times when we select a driver first , it will not "get the job done"....perform to our expectations. It is always best to "model out" several choices of drivers before purchasing....to avoid some 'disappointment' with the final performance.


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Last edited by Richard Ellis; 25th January 2014 at 06:04 PM. Reason: typo
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Old 26th January 2014, 04:28 AM   #4
Thabto is offline Thabto  Italy
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Thanks guys, I guess I ill try to get those T/S parameters.
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Old 27th January 2014, 01:45 AM   #5
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Quote:
Originally Posted by Thabto View Post
I have made my first diy sub build, but I am having trouble getting deep bass. All I hear is mid bass. I bought a low end 10" Infinity sub-woofer driver and made a 1.45 cubic ft box for it using supawood.
t/s parameters for the Infinity car audio drivers (I'm assuming you're referring to a car audio driver) are available at the Infinity website, Infinity - Home, Car & Marine Audio. If you're using your subwoofer in home not in car, then you'll definitely need to go with a vented alignment if you're using an Infinity 10" car audio speaker.
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