[SteveRB]

Hello,

I am looking for Calrad speaker drivers -- specifically the Co-axe models: CR-8X or CR-12X.

Thanks

[Æ]

Hello,

I am looking for Calrad speaker drivers -- specifically the Co-axe models: CR-8X or CR-12X.

Thanks

Did you ever get around to finding and fixing that coaxial driver with the bum tweeter? You were looking at all sorts of small tweeters. Find anything to your liking?

[SteveRB]

Not yet.

It's been a busy month and I'm still unsure of how to properly integrate a tweeter. Been doing a lot of reading but there is always so much contradictory advice. I'm planning to do a full audit of the driver to get a better understanding of the frequency response this weekend. I think I got overwhelmed by the options on the market. I have my eye out for a vintage replacement tweeter but they are all 3.5" and the original was a 2.5".

Now I'm also looking for a second set of these drivers to do more experimenting.

Moving into a bigger place this month, so I should be settled in for a bunch of builds later this winter.

Thanks for following up.

[Æ]

Not yet.

It's been a busy month and I'm still unsure of how to properly integrate a tweeter. Been doing a lot of reading but there is always so much contradictory advice. I'm planning to do a full audit of the driver to get a better understanding of the frequency response this weekend. I think I got overwhelmed by the options on the market. I have my eye out for a vintage replacement tweeter but they are all 3.5" and the original was a 2.5".

Now I'm also looking for a second set of these drivers to do more experimenting.

Moving into a bigger place this month, so I should be settled in for a bunch of builds later this winter.

Thanks for following up.

What contradictory advice? (I only give sound advice)

[SteveRB]

HA!

Yes, and I thank you for it.

However, there are several other sites with differing 'facts' on how to cross-over and which tweeter to use for various driver types...

I am still mainly considering the tweeters you first posted. I'll have a ton more time to get deeper into it by the end of the month.

[Æ]

HA!

Yes, and I thank you for it.

However, there are several other sites with differing 'facts' on how to cross-over and which tweeter to use for various driver types...

I am still mainly considering the tweeters you first posted. I'll have a ton more time to get deeper into it by the end of the month.

If you crossover high enough, you can always get away with using a simple first order high pass. A single capacitor and maybe a resistor in series too, to attenuate the tweeter if needed.

I think the real problem with a co-axial driver is the diffraction that the tweeter causes for the low pass frequencies. The tweeter will have it's own diffraction signature regardless and there isn't a heck of a lot you can do about it. Except maybe use a lot of felt padding around the tweeter, but it would look rather goofy.

[SteveRB]

I think the real problem with a co-axial driver is the diffraction that the tweeter causes for the low pass frequencies.

can you explain the diffraction a bit more?

[Æ]

can you explain the diffraction a bit more?

The concept is simple enough to understand, but it is still quite a lot to explain.
Here, try this. It is a long article, so maybe just skim through it, gets better as you go down. Look at the graphs.

Article by Jeff Bagby. http://www.salksound.com/wp/?p=160