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Need speakers that can rock with just one watt? You found da place.

JBL 2245 in 828 cab

I sealed off the upper chamber with a plywood baffle. The new front baffle is 3/4 ply, bolted on using T-nuts. The available volume in the bottom is probably not enough (L.T. 8 ft^3) so I stuffed it with 4 pounds of polyfil. I tuned the bass to the low 30's using a 72 sq in port that is 18 inch long. I measured the impedance with and with out polyfil and the tuning did not change much. However with polyfil the shape of the impedance curve did flatten out at the bottom. If I can figure out how to upload the Excel plot of impedance I will do so.

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Jim N


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