Dont start with crossovers.
Try implementing single drivers or dual driver single spout.
Learn about tubing, damping.
Then learn about RLC effect in series and parallel to a single driver.
R is resistor
L is inductor
C is capacitor
Then move to GV, HE and GK drivers. They have preassembled crossover.
Well its easy in beginning and is easy till the moderate level of designing.
But then the wall(yes that's a wall and not curve) of difficulties hit after that.
And... Single drivers are amazing if you get tuning right, plus less of hassle.
I have Ety ER4S diy with "series" 200ohm vishay melf resistor.
It is faster than anything I have heard. Even 64audio U18T doesn't come close to this speed of detailing. But it needs a tonne of power to drive....so no no....
Note: lol
OK "series" is when resistor is placed in same line of wire as speaker is.
"Parallel" is shorting(short circuiting) the circuit and placing the component on the short circuit.
First, the no crossover or circuit designs on this thread
Basic ones
And let me tell you, savant diy and
@Furco design are better than some flagship roaming around
Etymotic ER4 DIY
Noble Savant DIY(just a 20ohm resistor)
@Furco GQ+RAB
Try these out.....
Then you can move to slightly complex ones