Both bass reflex tubes are inserted through the rear panel. They are each venting one chamber.
2 packs each of damping material (4 mats) are inserted into the upper and centre chamber. The lower chamber, where the crossover may be accommodated remains free of damping material.
The crossover is a 2 ½ way type, meaning that the bass driver is cut-off, while the midrange driver goes down to it's natural limit. There are no three separate frequency ranges.
The crossover components should be fixed either with cable ties or hot-glued onto a wooden board. Afterwards, they should be wired up. If you wish you can also use a universal PCB, where the leads of the components are fed through openings on one side of the PCB and soldered on the other.
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