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Multi-Way Conventional loudspeakers with crossovers

Planet10 looking for drivers
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Old 3rd July 2006, 04:43 AM   #1
mashaffer is offline mashaffer  United States
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Join Date: Jun 2004
Location: Indiana
Default Planet10 looking for drivers

Hey Planet10, could you keep an eye out for some particular drivers for which I am on the lookout.

I would like to find some mates for those organ speakers I salvaged (at least the 10" and probably the 15 and 6x9 too).

The numbers are

15"
661056, 27273, 2207421

10" driver:
668459, 24651, 2857420

Oval driver:
651805, 21739, 2857407

They are from a mid 70s vintage Wurlitzer console organ. The 15" is 8ohm and the 10" is 16ohm. I havent measured the oval yet. That 10 is a nice high Q driver with whizzer that I would like to try OB. The fs is a little high (87) but might still be useful.

Some pictures.

15" front

Front view of others

Back of the two big boys

mike
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Old 3rd July 2006, 04:47 AM   #2
mashaffer is offline mashaffer  United States
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Join Date: Jun 2004
Location: Indiana
PS. Here is the predicted IB response of the 10". It seems like a properly sized OB should smooth out that hump and still leave it good for about 70Hz or so yes?

mike
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Old 3rd July 2006, 05:29 AM   #3
Luke is offline Luke  New Zealand
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Hi Mike,

just curious, but do you have to measure your own Thiel parameters for these old drivers, and if so what sort of test gear do you need?

seeya arthur
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Old 3rd July 2006, 05:36 AM   #4
mashaffer is offline mashaffer  United States
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Join Date: Jun 2004
Location: Indiana
I was using my computer sound card, some resistors, and a pioneer car power amp along with my handheld DVM. I used the TSparam spreadsheet (googled for it) to do the initial measurements and then I made a spreadsheet to calculate the Vas using the added mass mthod which I found also by googling.

It seems to have worked well except for some small RS drivers that I tried. I am going to try switching one of my stereo receivers for the car amp to see if some weird impedance thing was causing the problem with the little guys.

mike
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Old 3rd July 2006, 06:21 AM   #5
Luke is offline Luke  New Zealand
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Hi Mike,

interesting stuff. Do you have a url explaining the process?
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Old 5th July 2006, 05:25 AM   #6
mashaffer is offline mashaffer  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Indiana
The TSparam spreadsheet has good step by step instructions.

Elliot Sound Products and ePanorama net have some good explanations. A google for measure speaker parameters should give you a lot to look at also.

mike
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