Test JBL CS1214 - Druckversion

Code:
Electrical Parameters            

Re    3.32    Ohm    electrical voice coil resistance at DC

Le    2.668    mH    frequency independent part of voice coil inductance

L2    2.711    mH    para-inductance of voice coil

R2    4.47    Ohm    electrical resistance due to eddy current losses

Cmes    1088.73    µF    electrical capacitance representing moving mass

Lces    24.74    mH    electrical inductance representing driver compliance

Res    46.65    Ohm    resistance due to mechanical losses

fs    30.7    Hz    driver resonance frequency 

            

Mechanical Parameters            

(using laser)            

Mms    154.606    g    mechanical mass of driver diaphragm assembly including air load and voice coil

Mmd (Sd)    139.991    g    mechanical mass of voice coil and diaphragm without air load  

Rms    3.044    kg/s    mechanical resistance of  total-driver losses

Cms    0.174    mm/N    mechanical compliance of driver suspension

Kms    5.74    N/mm    mechanical stiffness of driver suspension

Bl    11.917    N/A    force factor (Bl product)

Lambda s    -0.054        suspension creep factor

            

Loss factors            

Qtp    0.661        total Q-factor considering all losses

Qms    9.787        mechanical Q-factor of driver in free air considering Rms only

Qes    0.697        electrical Q-factor of driver in free air considering Re only

Qts    0.650        total Q-factor considering Re and Rms only

            

Other Parameters            

Vas    74.8575    l    equivalent air volume of suspension 

n0    0.298    %    reference efficiency (2 pi-radiation using Re) 

Lm    86.94    dB    characteristic sound pressure level (SPL at 1m for 1W @ Re)

Lnom    87.75    dB    nominal sensitivity (SPL at 1m for 1W @ Zn)

            

rmse Z    2.98    %    root-mean-square fitting error of driver impedance Z(f)

rmse Hx    2.32    %    root-mean-square fitting error of transfer function Hx (f)

            

Series resistor    0.00    Ohm    resistance of series resistor

Sd    551.00    cm²    diaphragm area