SUBWOOFER ENCLSURE FOR TWO PIONEER TSW307F 12" FREE AIR
i m building an enclouser for two tsw-307f subwoofer from pioneer ,it's a free air subwoofer .the box size is 3.1 cubic feet .and i want to install one of the sub inverted(i will invert the polarity in the amp)
i did a graph on win isd and it shows a peak of 100db
so do u think it's a good setup
i like the sub coz it got 94db all the designed subs for enclouser got 89db
can you please advice.clear loud voice is all i need
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For optimal performance there is really only one size for the box .Firstly, you get two different types of subwoofers, an open air, or closed air sub. If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long. If it is a 12 inch speaker, the box size will be 13 inches x 13 inches x 13 inches.
Firstly, If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long Box size will be 13 inches x 13 inches x 13 inches.
this is too close, your speaker wattage is alway's higher than your amplifier's wattage alway's to be safe because the hard pounding will make the speaker work harder, and this will cause your speaker burn out easily, though you can adjust your amplifier anyway's
Hello, The problem with the enclosure is that you purchased a "free-air" sub, which is designed to NOT use an enclosure. You need to simply mount the sub on a baffle (board) that covers the whole entire rear deck of your vehicle, and seperates the inside of the trunk from the cabin of the vehicle. Use sealant to keep the two compartments sealed air-tight and mount the sub on the baffle-board. The other option, is to build a very large box (larger than 3 cubic feet) that would be incredibly huge for the subwoofer, as a free-air, it has a VERY high QTS, and relies on a massive amount of air behind the woofer to allow it to reach low frequencies. The best bet would be to get rid of the free-air sub and purchased a sealed enclosure subwoofer for use in a small (.6-1 cubic foot) sealed box.
I have had the same problem that you are having right now. I basically don't know how to start making my own sub box. Well, I chose the Bass-reflex type Box. This the best. Check this link out for a detailed overview of sub box making. http://www.hardwareanalysis.com/content/article/1789/build-your-own-10-inch-subwoofer/
Bridging your amplifier @ 4 ohm will yield the most power.... with the subwoofers you have.
You must wire them in Parallel.
Positive on both subwoofers to + on amplifier.
Negative on both subwoofers to - on amplifier.
The lowest impedence possible with 8 ohm woofers is 4 ohms.
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