www.gippro.com

SPECIFICATIONS
Nominal diameter                                     : 300mm.12in
Nominal Impedance                                  : 8 ohm
Program Power                                         : 300w
Continuous Power (RMS)                            : 250w
Sensitivity (1w/1m)                                   : 96.5dB
Frequency range                                       : 54 – 4KHz
Voice coil diameter                                    : 38.5mm
Voice coil length                                        : 16mm
Magnet dimension                                     : 120mm x 20mm

 --------------------------------------------------------
--- BassBox Pro Version 3.03, Export Thiele-Small Format
--- May 18,2009,  Mon 5:57PM
--- GPA 1239
--- Parameters marked with ** are not tested using the WT2
--------------------------------------------------------
--- mechanical ---
Fs          56.166E+00 Hz       Free air resonance
Qms          6.547E+00          Q mechanical
Vas         55.949E-03 m^3      Suspension compliance
Cms        138.968E-06 m/N      1/(suspension stiffness)
Mms         57.781E-03 kg       Moving mass
Rms          3.115E+00 kg/s     Mechanical resistance
Xmax **      0.000E+00 m        Maximum acoustic linear motion
Xmech**      0.000E+00 m        Mechanical displacement
Dia        260.350E-03 m        Piston diameter
Sd          53.236E-03 m^2      Piston area
Vd   **      0.000E+00 m^3      Displacement volume
--- electrical ---
Qes          1.325E+00          Q electrical
Re           5.301E+00 ohms     Voice coil DC resistance
Le         733.281E-06 Henries  Inductance @1 kHz
Z            8.653E+00 ohms     Impedance @1 kHz
BL           9.033E+00 Tm       Motor force - Newtons/Amp
Pe   **      0.000E+00 W        Max Electrical Power
--- electro-mechanical ---
Qts          1.102E+00          Q total
no         703.118E-03 %        1/2-space ref efficiency @ 1m/1W
1-W SPL     90.488E+00 dB       sensitivity at 1m on-axis
2.83V SPL   92.276E+00 dB       sensitivity at 1m on-axis
  --- motor constants ---
Krm        268.704E-06 ohms     constant resistive motor impedance
Erm        956.077E-03          exponent resistive motor impedance
Kxm         12.716E-03 Henries  constant reactive motor impedance
Exm        652.573E-03          exponent reactive motor impedance

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