57MS-FE-BT
Black steel basket
Paper cone cloth edge
1.5 KCCAW voice coil
20 OZ Ferrite Magnet
Frequency : 110-6.5KHz
RMS power:200Watts
Impedance:4OHMS
Sensiticity: 97.1dB
| Specifications | |
| Nominal Diameter | 5*7inch |
| Nominal Impedance | 4 ohms |
| RMS Power Handing | 200W |
| MAX Power Handing | 350W |
| Sensitivity (1w/1m) | 97.1dB |
| Frequency Response | 110-6.5KHZ |
| Motor | |
| Voice Coil Diameter | 39.3mm（1.5inch) |
| Voice Coil Former Material | KC |
| Winding Material | CCAW |
| Cone Material | Paper |
| Dust Cap Material | Aluminum |
| Surround Material | cloth edge |
| Basket Material | Steel |
| Magnet Material | Ferrite |
| Magnet Weight | 20 OZ |
| Displacement Volume |
| Measurement | |
| Overall Diameter | 218.5x141mm（8.59x5.54inch） |
| Overall Depth | 69mm（2.71inch） |
| Front Mount Baffle Cutout | 178.5x127mm（7.02x4.9inch） |
| Mouting Depth | 64mm（2.52inch） |
| Motor Diameter | 110mm（4.32inch） |
KLIPPEL ANALYZER SYSTEM
Report 
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Name Value Unit Comment |
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Electrical Parameters |
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Re |
3.27 |
Ohm |
electrical voice coil resistance at DC |
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|
Le |
0.036 |
mH |
frequency independent part of voice coil inductance |
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|
L2 |
0.281 |
mH |
para-inductance of voice coil |
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|
R2 |
1.89 |
Ohm |
electrical resistance due to eddy current losses |
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|
Cmes |
309.69 |
μF |
electrical capacitance representing moving mass |
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|
Lces |
2.87 |
mH |
electrical inductance representing driver compliance |
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|
Res |
36.37 |
Ohm |
resistance due to mechanical losses |
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|
fs |
168.7 |
Hz |
driver resonance frequency |
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Mechanical Parameters |
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(using laser) |
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Mms |
8.042 |
g |
mechanical mass of driver diaphragm assembly including air load and voice coil |
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Mmd (Sd) |
5.748 |
g |
mechanical mass of voice coil and diaphragm without air load |
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|
Rms |
0.714 |
kg/s |
mechanical resistance of total-driver losses |
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|
Cms |
0.111 |
mm/N |
mechanical compliance of driver suspension |
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|
Kms |
9.04 |
N/mm |
mechanical stiffness of driver suspension |
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Bl |
5.096 |
N/A |
force factor (Bl product) |
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Lambda s |
0.052 |
|
suspension creep factor |
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Loss factors |
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Qtp |
0.999 |
|
total Q-factor considering all losses |
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Qms |
11.941 |
|
mechanical Q-factor of driver in free air considering Rms only |
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Qes |
1.075 |
|
electrical Q-factor of driver in free air considering Re only |
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Qts |
0.986 |
|
total Q-factor considering Re and Rms only |
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Other Parameters |
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Vas |
4.0254 |
l |
equivalent air volume of suspension |
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n0 |
1.729 |
% |
reference efficiency (2 pi-radiation using Re) |
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Lm |
94.40 |
dB |
characteristic sound pressure level (at 1 m for 1 W @ Re) |
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|
Lnom |
95.27 |
dB |
nominal sensitivity (SPL at 1 m for 1 W @ Zn) |
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rmse Z |
1.69 |
% |
root-mean-square fitting error of driver impedance Z(f) |
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rmse Hx |
2.84 |
% |
root-mean-square fitting error of transfer function Hx(f) |
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Series resistor |
0.00 |
Ohm |
resistance of series resistor |
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Sd |
160.35 |
cm2 |
diaphragm area |
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