Planet10 looking for drivers

mashaffer · 3rd July 2006, 03:43 AM

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

mashaffer · 3rd July 2006, 03:47 AM

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

Luke · 3rd July 2006, 04:29 AM

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

mashaffer · 3rd July 2006, 04:36 AM

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

Luke · 3rd July 2006, 05:21 AM

Hi Mike,

interesting stuff. Do you have a url explaining the process?

mashaffer · 5th July 2006, 04:25 AM

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

3rd July 2006, 03:43 AM	#1
mashaffer diyAudio Member Join Date: Jun 2004 Location: Indiana	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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3rd July 2006, 04:29 AM	#3
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	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

3rd July 2006, 04:36 AM	#4
mashaffer diyAudio Member 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

3rd July 2006, 05:21 AM	#5
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	Hi Mike, interesting stuff. Do you have a url explaining the process?

5th July 2006, 04:25 AM	#6
mashaffer 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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