U CAN'T DO THAT/NOT advice to do that..... unless the value of the coil, resister &cap of proAc is exactly the same as the speaker u 12 put in (rarely happen).
combination of R(resistant) & C (capacitant) can create a high pass filter /low pas filter depend on the way of arrangement...
F=1/2pi(RC) F=cut off frequency
u can get more info in internet just type in hihg pass filter /low pass filter..
Different tweeter & woofer & diffenrent design of box may have different suitable cut off frequency for the drive.... for e.g tweeter A may suit to has hi pass cut off at 2.5kHz, but tweeter B may suit for cut off at 4kHz, then the combination of RC will be different...
u just search from internet for DIY speaker &crossover...then u will get a lot info including some culcalation software...but still got variation during practical...
For more detail on culculation u better learn from shifu here like KK & Modo.
