The Crossover
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Kit parts

Crossover kit excl. drivers available from Jantzen Audio: contact@jantzen-audio.com
Damping materials also available (felt/bitumen pads and wool/acoustilux/dacron)
Superior Z cap version also awailable, but increase cabinet depth to make up for added volume. The Sup-Z caps are huge!

Measurements
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Left: I any 2-way midbass system, a smooth upper roll-off is important and so the 18W/8545-00 does.
Right: Driver matching. Here we see the two midbass drivers coming with the kit. SPL is merged at
350 Hz with nearfield measurement.

Left: System response @ 2.8V, 1 meter distance for left and right speaker. Sensitivity around 86 dB/2.8V.
Farfield response merged with nearfield response of bass driver at 350 Hz.
Right: Response of individual drivers, blue and green and summed response, red.

Left: Blue = response with inverted tweeter polarity. Point of crossover = 2.9 kHz.
Right: System impedance. Minimum impedance = 4 ohms at 500 Hz.