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DIY Budget subwoofer design
DIY Budget subwoofer design
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Old 2nd October 2018, 12:02 PM   #11
bjorno is offline bjorno  Sweden
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Location: Jacobsmountain
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Hi All,


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Old 20th October 2018, 02:06 AM   #12
Tweet is offline Tweet  Australia
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Join Date: Jan 2015
The 8" subwoofer from SB Acoustics may be worth a consideration.............

8" SB23MFCL45-8 :: SB Acoustics

The 4 ohm version has a slightly higer sensitivity...............

8'' SB23MFCL45-4 :: SB Acoustics

These are designed for a smaller box of less than 20 litres.

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Old 20th October 2018, 06:57 PM   #13
hagarth is offline hagarth
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Join Date: Sep 2018
I already built the subwoofer and and just waiting for an opportunity to assemble the electronics, post some pictures and actually test it.

The final enclosure had 290x400x462 mm, and was built from 16mm MDF. This had to do with the space available in the living room, the size of the panels commonly available and the cost. The speaker in the front, with a round port below.

The interior and all exposed faces were "sealed" with several layers of a solvent based product, and the exterior was covered with two layers of a very thick primary, sanded to 600 grit. Instead of painting, I found a black vinyl with a good looking mate texture and used it. It looks nice and was _very fast_ to apply.

A brief test up to 50W provided very nice results with a clear and deep bass (it seems to fit the purpose). However at this level of power, many problems can go undetected.

I plan to add a TDA 7498E Amp, and a NE5532 LPF, which are around in some storage box.
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