FI box for subwoofer Ural Bulava 15 inches with port setting 34 Hz

The box for the Ural Mace 15, phase reflex type on the slot, is designed to get the maximum volume from the subwoofer and a smooth frequency response. Port setting 34 hz. The advantages of this subwoofer are its ability to win back low frequencies well, this is what its resonant frequency Fs = 25.7 hz tells us about. And also, compared to the 12-inch model, its sensitivity is many times higher, i.e. one 15-inch subwoofer will play about 2 times louder than the 12-inch version.

Now about a fly in the ointment. In general, the main disadvantage for this model is the size of the box, in order for the subwoofer to play properly, it needs a large volume. But if you do not need a trunk, or you are the owner of a large car, then this caliber is for you. From the foregoing, we can conclude that the drawing of this box is perfect for music lovers with a pronounced low bass. RAP, TRAP. etc.

The size and number of parts for the construction of the box, i.e. you can give the drawing to a company that provides wood cutting services (furniture), and after a certain time pick up the finished parts. Or you can save money and do the cut yourself.

Detail dimensions:

1) 395 x 786 2 pcs (front and back wall)

2) 395 x 540 1 piece (right wall)

3) 395 x 440 1 piece (left wall)

4) 395 x 650 1 piece (port 1)

5) 395 x 64 1pc (port 2)

6) 786 x 576 2pcs (bottom and top cover)

7) 395 x 92 2pcs (rounding port) both sides at an angle of 45 degrees.

Characteristics of the box

Subwoofer speaker - URAL (Ural) Bulava 15;

Box setting - 34 hz;

Net volume - 120 l;

Dirty volume - 160 l;

Port area - 395 cm;

Port length 75 cm;

Box material width 18 mm;

The calculation was made for a medium-sized sedan.

box frequency response

This graph shows how the box will behave in a medium-sized sedan, but in practice there may be slight deviations since each sedan has its own interior characteristics.

Conclusion

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