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Seas P21RF/P 8" Poly cone woofer with phase plug
- Poly cone with high loss rubber surround
- phase plug
- very smooth response to 3kHz
- low distortion motor design
- good choice for 2-way design or as a midrange in high power system
- 2" diameter voice coil
Fs 34Hz
88dB sensitivity
8 ohm nominal impedance
6.4 ohm Dcr
4mm x-max
0.8 mH inductance
22g mms
Cms 1.0 mm/N
Sd 194 sq cm
Vas 48.3 liters
Qms 1.70
Qes 0.42
Qts 0.34
1.25 pound magnet
125 watt long term power
300 watt short term power
Flange diameter 215.4mm (8.5")
Cut out diameter 186.8mm (7.4")
Depth 75.3mm (3")
See this woofer in our Cygnet MKII speaker kit here.
Recommended box alignments:
0.75 cubic feet with Flared 2" vent by 7" long for an F3 of 48Hz
or
1.0 cubic feet with Flared 2" vent by 6" long for an F3 of 43Hz
or
1.2 cubic feet with Flared 2" vent by 5.5" long (or non-flared 2.5" vent by 8.5") for an F3 of 40Hz.
(Subtract 1" from length if using non-flared ports on any of the above)
Sealed box of 0.5 cubic feet will result in an F3 of 65Hz
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