winISD discrepancy

sadams · 21st February 2011, 12:23 PM

Parts Express used to sell a great littel midbase for the money, the Peerless 830341 5.25" midbase. Now I am working on a project to incorporate 4 of them plus tweeter into a pair of 2-way MMTMM boxes. The PE spec sheet on this driver says that “this woofer is great in a .3 cu.ft. vented box tuned to 55Hz, giving an F3 of 60 Hz.” Based on this I assumed that I would use a box ~1.2 cu ft. (since using 4 drivers) with appropriate tuning. When I ran the specs thru winISD pro with a vented box I got a volume of 1.9 for the 4 drivers. Cant figure out where the discrepancy would have come from. Would appreciate any ideas or clarification. Thanks

AndrewT · 21st February 2011, 12:58 PM

Sadams,
put back the default font of this Forum.

BTW,
WINisd allows you to insert any reasonable size of box. You are not constrained to using 1.9cubft.

sadams · 21st February 2011, 01:01 PM

Dont know how the font changed Andrew T., and not sure how to change it now that it is posted

21st February 2011, 12:23 PM	#1
sadams diyAudio Member Join Date: Feb 2011	winISD discrepancy Parts Express used to sell a great littel midbase for the money, the Peerless 830341 5.25" midbase. Now I am working on a project to incorporate 4 of them plus tweeter into a pair of 2-way MMTMM boxes. The PE spec sheet on this driver says that “this woofer is great in a .3 cu.ft. vented box tuned to 55Hz, giving an F3 of 60 Hz.” Based on this I assumed that I would use a box ~1.2 cu ft. (since using 4 drivers) with appropriate tuning. When I ran the specs thru winISD pro with a vented box I got a volume of 1.9 for the 4 drivers. Cant figure out where the discrepancy would have come from. Would appreciate any ideas or clarification. Thanks

21st February 2011, 12:58 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Sadams, put back the default font of this Forum. BTW, WINisd allows you to insert any reasonable size of box. You are not constrained to using 1.9cubft. __________________ regards Andrew T.

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21st February 2011, 01:01 PM	#3
sadams diyAudio Member Join Date: Feb 2011	Dont know how the font changed Andrew T., and not sure how to change it now that it is posted

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