SPECIFICATIONS
Nominal diameter                                    : 300mm.12in
Nominal Impedance                                 : 8 ohm
Program Power                                        : 350w
Continuous Power (RMS)                           : 250w
Sensitivity (1w/1m)                                  : 97.5dB
Frequency range                                      : 56 – 3.5KHz
Voice coil diameter                                   : Æ45.5mm
Voice coil length                                       : 13mm
Magnet dimension                                    : 145mm x 20mm.

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--- BassBox Pro Version 3.03, Export Thiele-Small Format
--- May 20,2009,  Wed 3:56PM
--- GPA 1245
--- Parameters marked with ** are not tested using the WT2
--------------------------------------------------------
--- mechanical ---
Fs          53.243E+00 Hz       Free air resonance
Qms          6.061E+00          Q mechanical
Vas         46.838E-03 m^3      Suspension compliance
Cms        128.417E-06 m/N      1/(suspension stiffness)
Mms         69.580E-03 kg       Moving mass
Rms          3.841E+00 kg/s     Mechanical resistance
Xmax **      0.000E+00 m        Maximum acoustic linear motion
Xmech**      0.000E+00 m        Mechanical displacement
Dia        254.000E-03 m        Piston diameter
Sd          50.671E-03 m^2      Piston area
Vd   **      0.000E+00 m^3      Displacement volume
--- electrical ---
Qes          1.052E+00          Q electrical
Re           6.271E+00 ohms     Voice coil DC resistance
Le         973.734E-06 Henries  Inductance @1 kHz
Z           10.828E+00 ohms     Impedance @1 kHz
BL          11.781E+00 Tm       Motor force - Newtons/Amp
Pe   **      0.000E+00 W        Max Electrical Power
--- electro-mechanical ---
Qts        896.202E-03          Q total
no         631.611E-03 %        1/2-space ref efficiency @ 1m/1W
1-W SPL     90.022E+00 dB       sensitivity at 1m on-axis
2.83V SPL   91.080E+00 dB       sensitivity at 1m on-axis
  --- motor constants ---
Krm        336.671E-06 ohms     constant resistive motor impedance
Erm        959.289E-03          exponent resistive motor impedance
Kxm         17.823E-03 Henries  constant reactive motor impedance
Exm        642.590E-03          exponent reactive motor impedance
--- End BassBox Pro Export ---

MATERIALS
Basket                                                     Steel
Cone and dust cap                                    Paper
Surround                                                  Thread coat
Voice coil wire                                           Copper
Voice coil bobbin                                       Aluminium