Fostex FF225WK, FF-WK-Serie, full range speaker, 200mm, 8", 8 Ohm, fs ~ 17kHz
The new FF-WK series replaces the FF series with kenaf membrane. Completely revised, the series offers a number of new technologies such as a double-layer paper cone (kenaf/wood fiber), a stiffened aluminum dust protection dome and a newly developed suspension.
Features und technische Daten
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Size: 200mm/7.9”
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Overall diameter: 208mm/8.2”
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Baffle hole diameter: 185mm/7.3”
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Depth: 91.7mm/4.0”
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Voice coil diameter: 50mm/2.0”
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Cast/Stamped: Stamped
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Impedance: 8
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Reproduction frequency response: fs ~ 17kHz
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Sound pressure level: 93dB/W(1m)
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Rated input: 34W
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Music power: 100W
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Magnet weight: 1,067g/2.352lb
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Net weight: 3,520g/7.760lb
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Equivalent diaphragm radius a: 84mm
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Effective cone diameter D: 168mm
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Surface area of cone Sd: 0.022m2
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Nominal impedance Zn: 8
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Resonance frequency Fs: 44Hz
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DC resistance Re: 6
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Coil inductance Le: 0.068mH
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Mechanical Q Qms: 11.355
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Electromagnetic Q Qes: 0.409
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Total Q Qts: 0.35
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Equivalent mass Mms: 18.4g
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BL product (Factor force) BL: 8.488Tesla/m
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Compliance equivalent volume Vas: 57.898L
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Voice coil overhang Xmax: 2.25mm
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Reference efficiency n0 Eff/n0: 0.995%
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Mechanical compliance of suspension Cms: 0.826m/N
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Efficiency bandwidth product EBP: 107.579