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Speaker crossovers

I want to dip my toe in making a pair of DIY open baffle speakers using one 15 inch coaxial driver per speaker. Can anyone explain (at the 4th grade level  :)  why I need crossovers for coaxial drivers? Seems to me if I need crossovers, I might as well use separate drivers. I ask because I'd like to use a couple of these: 

https://www.bcspeakers.com/en/products/coaxial/15-0/8/15cxn76 

To complicate things the specs recommend XO-4 crossovers which I've found only to be manufactured in Italy. I thought the whole advantage to using coaxial drivers was so one wouldn't have to bother with crossovers. Guess I'm wrong. Please explain why and how one would hook up the crossovers. Also, what would happen if I didn't use crossovers (decrease the sound quality of the drivers or amp? Destroy or damage one or both)? Are there any high quality 15 inch coaxial drivers with "built-in" crossovers? I need "simple"  :(
mewsickbuff

Showing 1 response by oldhvymec

oldhvymec
5,101 posts
 
I looked up the specs. That driver is not a good driver to start with in an OB set up. Total Q is way to low (.21) needs to be over .50 or more.
99 and 105 on the sensitivity, there is a footnote on that measurement too, a "2" and a "5" for whatever reason. Probably different distance.
Anything to confuse you...and get a better measurement... Tannoy uses drivers that are coaxial. Cures a lot of problems in some cases...

It says in the information you need the aforementioned XO..
Gives every spec you need.
TO BUILD A BOX.. sorry had to say that... :-) No mention of OB unless I missed something.

Regards
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