I measured one of my old 40-9000 driver from RadioShack / Realistic.
3 out of 4 are still good, 1 has a voice coil that measures way off.
What can I do with these besides using them as a salad bowl?
Measurement was done on only one of them with the added mass method and yes, I thing the result is correct.
Measuring other drivers gave very good results, so these really must be the worst drivers I've ever seen...
3 out of 4 are still good, 1 has a voice coil that measures way off.
What can I do with these besides using them as a salad bowl?
Measurement was done on only one of them with the added mass method and yes, I thing the result is correct.
Measuring other drivers gave very good results, so these really must be the worst drivers I've ever seen...
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1425cm^2 for a 15inch!?!Measurement was done on only one of them with the added mass method and yes, I thing the result is correct.
Looks a lot better but still needs a box of 8000l or 280ft³ for a Qtc of 0.8
With 176l or 6.265ft³, the Qtc is at 1.5 and the response doesn't look half bad now.
-3dB at 32hz and a bump of 4dB at 52hz
Still, suggestions are welcome of course.
Would isobaric turn out well? The efficiency is a bit low for that, I guess.
With 176l or 6.265ft³, the Qtc is at 1.5 and the response doesn't look half bad now.
-3dB at 32hz and a bump of 4dB at 52hz
Still, suggestions are welcome of course.
Would isobaric turn out well? The efficiency is a bit low for that, I guess.
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It looks more...euh...'realistic' . Btw is that the first measurement from your new measuring system?Looks a lot better
Lol, good one
First measurement was a B&W 200/4 (8" driver)
Second Visaton FRS8
This 15" was the 'turd' one. haha
Now I'm going to measure the other 15" woofers.
Yes, also the one that has the bad voice coil, could be educational to me.
PR, OB, IB are attractive, I which I had the possibility for IB.
For PR, these drivers aren't worth the extra money.
Thanks.
First measurement was a B&W 200/4 (8" driver)
Second Visaton FRS8
This 15" was the 'turd' one. haha
Now I'm going to measure the other 15" woofers.
Yes, also the one that has the bad voice coil, could be educational to me.
PR, OB, IB are attractive, I which I had the possibility for IB.
For PR, these drivers aren't worth the extra money.
Thanks.
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