simple active crossover

[umut1001]

Is your circuit 6db/oct or 12db oct? There is 0.1uf at the hpf which is connected to 10k pot also makes 6db/oct so it will be summed and make 12db oct?

 

[adason]

Correct. Second HP is optional. You can make it 6 only, just increase second cap on output.

LP is 12dB/oct.

Most of the time people in listening test prefer shalow HP and steeper LP.
Plus I use top section on open baffle, there is some acoustic rollof too.

 

[umut1001]

I am planning to make it for Aiyama 4inch FR (Also i have 3 inch full ranges too and want to use them sometimes too). And SB34NRX75-6 woofers. Sealed FAST system. But not sure which type of filters would be best

 

[adason]

Only you can decide that.