Please help me

this will be my first attempt to biamp this speakers

dbx electronic crossover 223s
hafler dh110 preamp
bgw 750 amp (230rms 8 ohm) gain knobs at amp
hafler dh220 (100-120rms 8ohm) external volume control to change gain if needed buy dbx crossover have gain input and ouput

4530 clone baffle
18"electro voice evm18b series 2 woofer ,repaired hand made coil 16ohm no idea on sensivity
2446j driver 16ohm original diapragm- 2350 horn
3105 crossover 075 tweeter new not original diapragms 16 ohm

electronic crossover frecuency cross - I supose 500hz but I open to any advice

Sensitivity: 111 dB SPL, 1 W @ 1 m on-axis on hornē118 dB SPL, 1 mW on plane-wave tubeģ

evm18b original sensivity at 8 ohm was EVM-18B was 8ohm with a sensitivity of 99db(1w/1m) rated @ 400/800/1600 (im not sure)

im lost here, I need help , a baseline ?

I want to buy an usb micophone to use the rew program for some tools to help with this task.

I supose with unknown info this is difficult
only info that I have is for the driver 2446j 16ohm with 100rms 8ohm amplifier,

thanks in advance for your help