The idea of assembling a subwoofer has been bugging me for months. And then one day, when I went to the radio station, I caught sight of the Semtoni woofer, and I decided to buy it ...
Next week I devoted the subwoofer calculation. I downloaded several programs for calculating the subwoofer enclosures (DLSBox2000, JBL-Speakershop, WinISD ...) Most of all I liked the DLSBox2000 program. Using it, I calculated the sub. And that's what happened - the effectiveness of this design (FI) for my speaker is 76%, volume - 37 lire (external dimensions 45h35h35sm.), Bass reflex 75x100mm. (Diameter / length).
Then he drew a sketch on paper, and began making it.
All the walls were twisted with screws 50 mm long. All the joints are planted on the PVA glue (advice - do not regret glue, superfluous squeeze out). Inside, for more reliability, the seams are smeared with silicone sealant. In principle, this is not necessary, but it's better to miss and forget than to disassemble again.
Then proceeded to putty. Shpaklevku used car, two-component (You can make the putty yourself, mixing fine wood shavings and PVA glue, as an option). When the putty dried, I polished the body almost to the ideal plane.
Then cut out the holes for the bass reflex, the socket, under the pockets-pockets.
We collect a subwoofer, in order to see how it sounds.
All my doubts about the correct calculation of the volume of the box in a moment were dispelled - the self-made subwoofer played a soft even bass. Making sure that nothing whistles anywhere, I shot the "hardware" and proceeded to pasting the case with a self-adhesive paper with the texture of the skin. Collected.
The cost of manufacturing a subwoofer:
Woofer Semtoni 10 "(25 cm) 350w (rms, max) - 1100 rubles.
Particleboard 20mm. - free, found in the attic
Glue PVA - free of charge, was already in stock
Self-tapping screws 50mm. 100 pieces. - 26 rubles
Silicone sealant, transparent - 59 rubles
Gun for sealant - 40 rubles
Socket with terminals - 65 rubles
Acoustic wire 1m. - 60 rubles
Fazoinvertor 75h100mm. - 40 rubles
Pens «Pockets» 2pcs. - 100 rubles
Total about 1800 rubles.
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