This is my first time crossover modeling, asking for more experienced opinion?

[Luke H]

Will this 1K dip be an issue?
Tried to keep the whole thing within a +-5dB limit, is this a good rule of thumb?


Thanks, Luke.


Edit: I'm not looking for a flat response or anything just good listening quality, perhaps a slight smiley face EQ ideally.

 

[PCSoldaat]

What if you invert polarity of the tweeter?

 

[AllenB]

Maybe find out why. Switch off system phase and turn it on for each driver.

 

[Luke H]

Noob question:

What if you invert polarity of the tweeter?

Thank you, this helped level out the response!

Is inverting the tweeter polarity a viable, permanent solution I.E. in the finished product?



Here is what it looks like inverted and tweeked:

 

[Sonce]

Better, but still not (very) good. Also, crossover frequency is dangerously low, the tweeter will distort and may burn up (assuming typical 1-inch tweeter).
Please post the driver measurement (also, state the drivers make and model), I will try to make a proper crossover.

 

[Luke H]

Thank you, that's very helpful to know!

Woofer: https://www.parts-express.com/pedocs/specs/295-308-dayton-audio-dc160s-4-specifications-46148.pdf

Tweeter: https://www.parts-express.com/pedoc...ilk-dome-truncated-tweeter-specifications.pdf

 

[Sonce]

Hmm... You are using traced graphs from factory spec sheets. Not ideal, but workable.
Please send me (PM) the SPL.txt and Z.txt files for midbass and tweeter.

 

[ernperkins]

The best thing you could do is stop simulating and carefully read this:

Paul Carmody's DIY Speaker Pages - Simulated Measurements pt1

It explains the steps you are missing before simulating (the reason Sonce stated his post with "Hmm....)".

 

[Sonce]

Here is my attempt on the crossover. Crossover frequency is rather low, at 1600 Hz, which may be problematic for the tweeter, regarding distortion. Measured distortion vs frequency would be nice for the peace of mind, but I could't find it.
DC160S frequency response is problematic: there is a peak at 1.5 kHz, followed by dip at 2 kHz, and another peak at 2.8 kHz - very difficult to linearize.

 

[Luke H]

Thanks very much for your info, I'll read that link and maybe choose different drivers. Very helpful

 

[Sonce]

Another version, with slightly higher crossover frequency and steeper roll-of for better tweeter protection.