determining unlisted parameters

[ttvonau]

Is it possible to find the Le --mH of a driver without manuf.listing it,if so how?Proper xover design without it seems impossible.

 

[ttvonau]

Other known as voice coil inductance

 

[kelticwizard]

Just for the heck of it, do you have a specific driver in mind? Maybe we can dig up the inductance spec.

 

[e96mlo]

You can measure the inductance with a LCR-meter.

 

[ttvonau]

Thanks guys but mcm finally emailed me with the .33 mh le spec.The driver I was inquiring about was the 55-1200 a 4.5"poly paper woofer .Impresive 94 db ef.and check out this response.All for under $10.00usd.

 

[kelticwizard]

That is impressive. For $10, you can't go wrong.

Somebody should clue MCM in about their website. I was getting catalogs from both Parts Express and MCM years ago, and considered them pretty much equal. Parts Express website kills MCM's website though-heck, you can barely even see pictures of the speakers. All I saw was a listing with order numbers.

 

[Variac]

Excessive parameters

I have the opposite problem:

I bought these Selenium 15" woofers and am working with them in WinISD but the program wants a parameter: Le

The manufacturer lists:
Le at Fs
Le @ 1 khz
Le @ 20 kz

These are in mH if that helps . So since Win ISD only wants one Le which one do I use?

Thanks,
MArk

 

[GlennME]

Thanks guys but mcm finally emailed me with the .33 mh le spec.The driver I was inquiring about was the 55-1200 a 4.5"poly paper woofer .Impresive 94 db ef.and check out this response.All for under $10.00usd.

Looks like an interesting speaker. Who makes it?

Glenn

 

[ttvonau]

Mcm electronics-55-1200 http://www.mcmelectronics.com/Profile/welcome-frame-unregistered.jhtml
Check out cheap mcm tower in these forums to see what they can do.

 

[GlennME]

Mcm electronics-55-1200 http://www.mcmelectronics.com/Profile/welcome-frame-unregistered.jhtml
Check out cheap mcm tower in these forums to see what they can do.

Thanks tt.

Glenn

 

[ttvonau]

I would think if you were going to use some type of low pass filter with the 15" 's you'd use the 1khz le.If your planning to let the 15's run there natural slope I'd use the 20 khz le spec.Just a guess though.