Fostex FF 85WK

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recommended cabinet 1:
closed cabinet with 0,84 L volume
from 163/103 Hz (-3dB/-8dB)
 
recommended cabinet 2:
3,4 L volume bass reflex cabinet
with HP35 reflex tube, 8 cm long.
from 73/64 Hz (-3dB/-8dB).

Fostex FF 85WK       order no. fx-ff85wk       EUR 57,90 excl. VAT: € 48.66 / $ 57.41
7 cm full range driver with high quality cone.
  • power handling (continuous/programme) = 5/15 W
  • frequency range = 100-28000 Hz
  • resonance frequency fs = 115 Hz
  • impedance R = 8 Ohm
  • sound pressure level SPL = 86,5 dB (2,83V; 1m)
  • DC resistance Re = 7,2 Ohm
  • force factor BL = 3,93 N/A
  • effective piston radiating area Sd = 28 cm2
  • effective mechanical mass incl. air load mms = 2 g
  • equivalent volume of compliance Vas = 1,03 l
  • total Q factor Qts = 0,56 (Qms=3,3, Qes=0,68)
  • voice coil diameter = 16 mm
  • maximum peak linear excursion vibration xlin = +/- 0,35 mm
  • mounting diameter d = 73 mm
  • overall diameter d = 83 mm
  • mounting depth (not countersunk) t = 46,7 mm
  • mass m = 0,45 kg
PDF data sheet
The cabinet volume calculations are executed considering an external resistance of 0.3 Ohm. We are using, if no other data is known or available, the information supplied by the manufacturer.

Please note: the frequency response doesn't say much about the cut-off frequency inside the cabinet! Therefore, we mostly give you 2 examples with dimensioning considerations and an indication, how low the loudspeaker will reproduce.

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