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Old 19th February 2013, 10:58 PM   #41
AllenB is offline AllenB  Australia
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On the other hand I'd want to specify the system first and decide whether it needs a crossover, then find drivers that will fit.
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Old 19th February 2013, 11:16 PM   #42
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re: "Isn't exactly the opposite what you should be doing since the crossover points are mostly determined by the limitations of the chosen drivers? " - if the crossover is implemented properly, it doesn't matter where the xover freq is, anything else is mere shadow chasing
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Old 20th February 2013, 01:07 AM   #43
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Ah I'm glad I wasn't the only one thinking the above (ie if it is implemented properly it shouldn't matter) Thanks PeteMcK... I guess I didn't have the confidence to say it

Of course some thought does still need to be put into the driver selection if you want to be able to actually achieve this, so you are thinking along the correct lines markusA but, I think you should be less focused on some theoretical best point, and more look at a range of possible points(for the particular design goals), and once the drivers have been chosen look at what works best for those drivers.

Choosing a crossover point based on what's best for the drivers chosen and implementing it very well, I would think will be more likely to sound better than choosing a crossover point based on some arbitrary design goals that may not in reality result in an ideal crossover with the chosen drivers. Unfortunately until you actually have the drivers and have taken measurements on your actual baffle you won't be able to tell.

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Old 20th February 2013, 01:11 AM   #44
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Default "shadow chasing"

How is crossover freq not part of proper implementation?
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Old 20th February 2013, 01:14 AM   #45
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Drivers 1st?

XO point 1st?

It is an iterative process, the 2 are far from independent.

dave
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Old 20th February 2013, 01:25 AM   #46
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Heck? Everything is connected to everything else
Room size first?
Cost second?
Find drivers that best fit criteria 1 & 2 then decide XO?
It gets so that sometimes I feel like throwing darts at a target
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Old 20th February 2013, 01:35 AM   #47
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I think that in reality moondog, that there is an element of that any time a new pairing of drivers is tried Obviously as ones experience grows it should be possible to get a better aim but I suspect that there will always be some drivers that will inherently be a better match than others, and finding them will be part of the art.

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Old 20th February 2013, 01:54 AM   #48
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OK My ability to throw darts gets better with experience but the target gets smaller at the same time
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Old 20th February 2013, 04:16 AM   #49
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Quote:
Originally Posted by lolo View Post
If you go really low, and loud, you get doppler distorsion too.

http://www.davidgriesinger.com/
Would you care to elaborate on this part?
I might have a bone to pick with you.

Regards, Jack
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Old 20th February 2013, 04:19 AM   #50
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I use compression drivers instead of dome tweeters. This to me is the biggest difference in the discussion. CDs have higher sensitivity (when coupled with the right horn), higher power handling, and will go lower in frequency. (generally speaking)

So in a the two ways that I consider, it is a 700-2khz crossover point for two ways.
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