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-   -   Which crossover is better? (http://www.diyaudio.com/forums/multi-way/166917-crossover-better.html)

mondogenerator 15th May 2010 12:30 PM

Which crossover is better?
 
Hi guys.

My current speaker project is going well. I had finalised my crossover design until i messed with Boxsim some more, and came up with an alternative design.

Id love some feedback concerning which design is better, especially regarding the phase and power response/off axis behavior, If anyone would like to help.

Ill post some plots and hopefully i can get some constructive criticism on either or both, in order to help me choose which crossover to employ before i finish building the speakers.

mondogenerator 15th May 2010 12:32 PM

Original crossover design:
 
first the original crossover design, and the simmed results:

http://s1.dastatic.com/forums/galler...2_xover_FR.jpg

http://s1.dastatic.com/forums/galler...r_Off_Axis.jpg

http://s1.dastatic.com/forums/galler...over_Phase.jpg

mondogenerator 15th May 2010 12:34 PM

New Mk2 crossover:
 
And now the plots for the Mk2 crossover:


http://s1.dastatic.com/forums/galler...P_xover_FR.jpg

http://s1.dastatic.com/forums/galler...r_Off_Axis.jpg

http://s1.dastatic.com/forums/galler...over_Phase.jpg

mondogenerator 15th May 2010 12:39 PM

Once again thanks, and I hope i can get some experts to help with evaluation
 
So once again thanks. basically id like some help evaluating the merits of both designs, and criticisms also, so i can choose which crossover to use in the finished design.

All Opinions welcome, it is a 2 way system in both cases

One is a 2nd order HP and 2nd order LP

One is a 2nd order LP and 1st order BP

If you want to be really impressive (or are really bored), then guess which is which!

Otherwise, ALL opinions welcome (no full range comments :D thats the next project

Conrad Hoffman 15th May 2010 01:10 PM

Who's to say they'd sound much different? The phase angle plots seem most interesting, though I find they can be hard to interpret if they fold up and down a lot as the second seems to do. I don't know if the LF differences are audible and the HF differences aren't that great. I'd go with the first (original) design.

mondogenerator 15th May 2010 08:05 PM

Quote:

Originally Posted by Conrad Hoffman (Post 2187901)
The phase angle plots seem most interesting

I agree. The Phase behaviour of the 2nd crossover doesnt look to be as good as the 1st, to me at least. The differences in FR are much less obvious.

Anyone have anything else to add?

s3tup 15th May 2010 08:14 PM

1st order at 2.4k - is a bad idea for tweeter, unless you have some really big tweeter, that thinks it is midrange...

mondogenerator 15th May 2010 08:29 PM

haha yes
 
haha youre right...i had neglected to notice the turnover frequency.....since the tweeter is Fs at about 1800Hz i think it is definitely a bad idea...

Inductor 15th May 2010 10:55 PM

Quote:

Originally Posted by S3TUP (Post 2188206)
1st order at 2.4k - is a bad idea for tweeter, unless you have some really big tweeter, that thinks it is midrange...

Quote:

Originally Posted by mondogenerator (Post 2188223)
haha youre right...i had neglected to notice the turnover frequency.....since the tweeter is Fs at about 1800Hz i think it is definitely a bad idea...

I would say the same thing. You notice the neck at 2K on tweeter from Fs.:D

mondogenerator 16th May 2010 10:06 AM

:D lol yes i notice...now i ACTUALLY look at the plots......

So the first crossover is better then?

The crossover point is slightly lower since the cap on the HP was increased from 5uF to 6uF, and i was worried about that turnover point being a little too low aswell.

this changes the -3dB turnover from 3k to 2.7k, and the tweeters Fs is 1.8k, so im a bit worried im cutting it a bit fine. I honestly cant hear any distortion or ill effects though, although it is early stages and i have only liostened to the crossover in the lower xover point for a few hours


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