Guest Pointwhere Posted July 16, 2004 Report Share Posted July 16, 2004 Does anyone have the T/S parameters for the woofer that comes in the AR-303? Also, manufacturer and model of this woofer would be helpful if available. Thanks, Link to comment Share on other sites More sharing options...
kkantor Posted July 17, 2004 Report Share Posted July 17, 2004 Hi. I'm working from memory here, but I think these numbers will be close:Fs = 20 Hz.Qts = 0.35.Vas = 75 liters.Re = 2.6 Ohms.The woofer was manufactured by Foster, in a Japanese plant that is no longer operational. It was a custom OEM item, and so there is no catalog part #.Hope this helps! Link to comment Share on other sites More sharing options...
Guest Pointwhere Posted July 17, 2004 Report Share Posted July 17, 2004 Is there any way to do measurements and determine these values exactly? I plan to use 303 drivers for a diy project, and would like to know so I can design the enclosure appropriately. Thanks, Link to comment Share on other sites More sharing options...
kkantor Posted July 19, 2004 Report Share Posted July 19, 2004 Hi. Of course, it is possible to test any woofer to determine its exact parameters. If you are asking me to test one, I could do that, but not for several weeks. Pretty busy at the moment.If you are serious enough about the cabinet to want more exact numbers than I provided, you probably should plan on testing the exact units you plan to build with. There are several books, and many websites that can instruct you concerning the procedure. For example:http://www.bcae1.com/spboxad3.htm. Link to comment Share on other sites More sharing options...
AR303 and classic 18 user Posted October 10, 2010 Report Share Posted October 10, 2010 Well I was able to measure one in recent days. I was hoping to compare this data to a series of posts that make reference to DUT1-7 where DUT1 was a 303 woofer but I could not find the complete data set. Anyway, here is what the WT3 had to say about this woofer.AR part number 2-11-0001-1* This data was exported from the Dayton Audio WT3 Woofer Tester * Free Air* Manufacturer: AR * Model: 303* Piston Diameter = 24.76 mm * f(s)= 24.22 Hz * R(e)= 2.67 Ohms * Z(max)= 25.59 Ohms * Q(ms)= 4.732 * Q(es)= 0.552 * Q(ts)= 0.494 * V(as)= 145.0 liters * L(e)= 1.13 mH I also did a series where i removed the stuffing put it back in and attached the crossover to show the effects of each. Enjoy. Link to comment Share on other sites More sharing options...
AR303 and classic 18 user Posted October 10, 2010 Report Share Posted October 10, 2010 Oh forgot to mention, I used 44 L for the box volume for the Vas measurement. I got this number from the library section and did not remove any allowance for the woofer in the box? Link to comment Share on other sites More sharing options...
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