21" PA SUBWOOFER - $100 (Woodburn)

condition: fair

make / manufacturer: Generic

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Selling old no-name 21" PA Subwoofer. These are possibly an older version of the Sound Town 21" (STLF-21120), but 4 ohm instead of 8 ohm, 400-500 watts. 21" backet x 8.625" height.

$100/ea. $200 for both!

In reasonable shape, with paint scuffing on the magnet. Cones and suspension are in good shape!

Woofer specs:

D 533.4 [mm]
Re 3.75 [Ohms]
Fs 25.57 [Hz]
Zm 60.09 [Ohms]
BL 17.50 [N/A]
Qms 9.046
Qes 0.602
Qts 0.564
Vas 888.200 [liters]
L10k 1.85 [mH]
n0 2.35 [%]
dBSPL 95.82 [1W/1m]
Ms 306.00 [grams]
Cms 0.13 [mm/N]

post id: 7926080998

posted: 2026-04-06 17:18

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21" PA SUBWOOFER - electronics - by owner - sale - craigslist