Subwoofers ver 3.0 Alpine SWR 1242 x2 "Pressure" — Toyota bB, 1.5 liter, 2003

Competitions only spur to achieve results.
So this time it was decided to make a box not quite traditional, but often found on foreign spl sites and increasingly began to appear on our ...

The speakers are located in the case in such a way as to load the box as much as possible and ensure maximum air exit from it to create pressure in the cabin.

A small trunk does not allow us to roam, but we work with what we have ...
And we had:
- 2x Alpine SWR 1242 12''
- Amplifier DLS MAD 15
- Borrowed battery "acid" 65 a / h + under the hood 55 a / h
- Wiring KG-50

For the manufacture of flanges for a phase inverter, a blank was machined.

The process is simple: you heat it up, twist it and tighten it... The
box is made of 16mm chipboard, the walls with double speakers.
All joints are smeared heartily with silicone.
The pipes are glued on “liquid nails” and screwed to the flanges from the inside with self-tapping screws ... we still need to try to putty them - we can give an increase))

This is how the synchrophasotron turned out))

The combat frequency stabilized at 49Hz ...

With this box + one mad15 I visited the AMT stage in Novosib (result 144.8db - 3rd place in the class "Amateur 15") and in Kemerovo with two mads in the bridge 1st Avtosvuk Fights without rules (153.7db - second place "Heavy category ")

We must also try to turn the wall with pipes, try to load the box harder. maybe it will give...

In general, to be continued.