Vermes
Advanced Member level 4
This project presents a home made active subwoofer. The first original thing you can see is the housing. As you can see, the device was closed in a wooden housing – color of which is “cherry” (but, of course you can use another color). Dimensions of the housing: 50x42x42. The wall is 30mm thick. The whole closed housing has 33 liters of volume net. The speaker works from the bottom and it is scattered by a profiled cone (half of its section is the edge of a quarter of ellipse, such as life performance tweeters tube). This cone scatters sound waves around, so there is no reverberation towards the membrane from the base.
The amplifier (MPA-3) is placed in a separate chamber. It is equipped with an active crossover that cuts-off frequencies above 90Hz with a drop of 24dB per octave. The amplifier is pulse-powered (without any transformer). It uses a twelve inch speaker - Beyma 12B100/R.
Parameters:
- power: 150/300W
- frequency band: 25Hz – 4000Hz
- very strong magnetic system (200mm)
- fs 29Hz
- coil ventilated from behind
Other pictures:
Link to original thread - Subwoofer aktywny 300 Wat od 20 do 90 Hz