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Discussion Starter · #1 ·
Fellas,


I'd like to replace all the drivers in a pair of old JBL 3-way speakers. I see lots of sites that will calculate box size when given the driver parameters (vas, fs, qts, etc.) but I'm looking for the opposite, to input the box volume, port size, etc. and get info on what the ideal driver parameters would be. Is there any free software or a site that would help with this?
 

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Just kidding.


It's a cool idea. But what would you do once you had the parameters? Is there a way to search for drivers based on parameters? Which parameter would be most important to you?
 

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Discussion Starter · #4 ·

Quote:
Originally Posted by CZ Eddie /forum/post/15450884


Blasphemy!
You're probably right, even though the JBL's are 22 years old they still sound good, no problems with any of the drivers...but new has to be better no?


Anyhooo, what I mean is, given the volume of the speaker and diameter and length of the port, is there a way to figure out what driver(s) would work (on paper anyway)? In other words, be compatible with this particular enclosure.


Specifically, I was looking at a Dayton RS270S-8 10" woofer and a 5 "Dayton midrange/woofer to replace the one's that are in it now.


I bought Speaker Building 201 but honestly I am just too lazy (or dumb) to figure it all out...without a computer program.
 

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Quote:
Originally Posted by shawnd1 /forum/post/15451233

You're probably right, even though the JBL's are 22 years old they still sound good, no problems with any of the drivers...but new has to be better no?


Anyhooo, what I mean is, given the volume of the speaker and diameter and length of the port, is there a way to figure out what driver(s) would work (on paper anyway)? In other words, be compatible with this particular enclosure.


Specifically, I was looking at a Dayton RS270S-8 10" woofer and a 5 "Dayton midrange/woofer to replace the one's that are in it now.


I bought Speaker Building 201 but honestly I am just too lazy (or dumb) to figure it all out...without a computer program.

Don't fix what isn't broken my father told me once
New driver doesn't mean will sound better depending what sound good to you.


Seriously would be way easier to build those boxes too, just sell those JBL and with the money get someone build your boxes if you can't build them, will sound by far better and less painful then trying to find speakers with the right parameter to fit the box.
 

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I'm no pro but I'm going to guess that you'll never find drivers with the exact same parameters as the originals, especially without documentation as to what those parameters are. With that being the case you have more to worry about than box interaction since the crossover will go cattywompus on you.


See if JBL sells replacements of your drivers. Then you'd get new drivers but hopefully the right specs.
 

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Discussion Starter · #7 ·
I found out that Parts Express has a page exactly for this problem. Its called the speaker selection wizard. I posted the URL but apparently the moderator wouldn't allow it.
 
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