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The Vifa M21WO-39-08 is a high quality bass speaker featuring a magnesium chassis and a coated pulp cone.
This is a very highly regarded 'old school' drive unit with a text book frequency response of ± 1dB between 120-900 Hz and a useable upper extension to just above 2.5 kHz, still within 3dB.
Now made by Scanspeak in Denmark using the original Vifa tooling.
|Resonant frequency (fs)||28 Hz||Nominal impedance (Zn)||8 Ω|
|Mechanical Q factor (Qms)||1.97
||DC resistance (Re)||5.5 Ω|
|Electrical Q factor (Qes)||0.35
||RMS power handling||80 W|
|Total Q factor (Qts)||0.30
||Sensitivity (2.83V/1m)||90 dB
|Equivalent volume (Vas)||105L
||Chassis diameter||215 mm|