4 khz Visaton crossover wanted

[OSLO]

I have a project where I need help calculating a 4 khz crossover.
The configuration is

1 DT 94 8 ohm and
2 W 130 S 8 ohm in parallel.

The volume is 13 liter and I use two BR 6.8 tubes

I know that a 3khz Visaton crossover looks something like this, but the W 130 S sounds very good up to 4khz.

An externally hosted image should be here but it was not working when we last tested it.

What would a 4khz Visaton crossover look like for this configuration ?

 

[PRR]

.... a 3khz Visaton crossover looks something like this,.....What would a 4khz Visaton crossover look like....?

Logically: each part adjusted by 3/4.