Originally Posted by cookieattk
i got within 10% of your specs last night using magnets on each side of cone and clamped to the side of a pool table i have in my garage with weights about a ton besides for the fs with i was getting 20hz or below did u change cones ? i noticed its different then the pics on your site.
You can measure Fs directly using REW and a series resistor in line with any low power amp.
Connect your Line-in cable to the driver terminals instead of your test mike and run a sweep.
REW then measures impedance instead of level.
Are links to other forums acceptable on here?
Original suggestion from Dan on the REW forum back in 2007: