crossover question

[bikerjay]

Hello all. I'm trying to design the crossovers for my latest 2 way speaker build. I attempted it once before. They wasnt awful but they wasnt great either and I ended up crossing over using dsp. Below in the pic, I am able to get the drivers to crossover at or around 2000 hz but the both the tweeter and woofer extend out past the crossover point. From what I understand, too far past the crossover. My question is, how do I get them to fall off right after the crossover point. I have tried several inductor, cap and resisitor combinations using Xsim4. It changes the output but not when they roll off. I'm trying to keep this as simple as possible. Also, the graph is 1/6 smoothing. Is that too much to get accurate results?

 

[AudiOhm]

What crossover slope are you using?

Ohms

 

[Keith_W]

You haven't supplied enough information for us to help you. It looks as if your tweeter high pass is set at about 800Hz, and your woofer's low pass at 3kHz. But then that could be a combination of LPF + "mechanical roll-off". You need to tell us what XO point, order, and Q (Linkwitz-Riley, Butterworth, etc) you are using. You also need to study the data sheet and take note of the usable bandwidth of your drivers. With this result, it is impossible to tell if you used the wrong values when calculating your crossover, or constructed your XO using the wrong parts, or whatever.

 

[audio_tony]

My question is, how do I get them to fall off right after the crossover point. I have tried several inductor, cap and resisitor combinations using Xsim4.

You need to gain an understanding of crossover types. 1st, 2nd, 3rd, 4th order etc.

The crossover type determines the rolloff in dB per octave. Obtaining a very steep rolloff (greater than 4th order) with a crossover (active or passive) is difficult without introducing other unwanted problems.

The steepest practical (passive) crossover is 24dB per octave - anything steeper than that has practical limitations.

 

[LTig]

You haven't supplied enough information for us to help you. It looks as if your tweeter high pass is set at about 800Hz, and your woofer's low pass at 3kHz. But then that could be a combination of LPF + "mechanical roll-off". You need to tell us what XO point, order, and Q (Linkwitz-Riley, Butterworth, etc) you are using. You also need to study the data sheet and take note of the usable bandwidth of your drivers. With this result, it is impossible to tell if you used the wrong values when calculating your crossover, or constructed your XO using the wrong parts, or whatever.

I think the OP did a miscalculation.
@bikerjay: can you show the schematics and how you derived the values of the individiul components. Also need to know the specs of both chassis.