SL-8MS-NEO
Black steel basket
Paper cone cloth edge
1.5 TiSV L1+1 voice coil
7.5 OZ high strength NEO Magnet
Frequency : 103-4.3KHz
RMS power:250 Watts
Impedance 4OHMS
Sensiticity: 98.2dB
| Specifications | |
| Nominal Diameter | 8 inch |
| Nominal Impedance | 4 ohms |
| RMS Power Handing | 250W |
| MAX Power Handing | 400W |
| Sensitivity (1w/1m) | 98.2dB |
| Frequency Response | 103-4.3KHZ |
| 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 | NEO |
| Magnet Weight | 7.5 OZ |
| Displacement Volume |
| Thiele & Small Parameters | |
| Equivilant Volume | Vas 6.571L |
| Excursion (one way) | Xmax mm |
| Free Air Resonance | Fs 108 Hz |
| Mechanical Factor | Qms 4.106 |
| Electrical Factor | Qes 0.590 |
| Total Factor | Qts 0.516 |
| Moving Mass | Mms 13.031g |
| Compliance | Cms 0.102m M/N |
| Bl Factor | Bl 7.981N/A |
| Diaphragm Area | Sd 213.82 cm² |
| Dc Resistance | Re 3.2 ohms |
| Measurement | |
| Overall Diameter | 209mm（8.22inch） |
| Overall Depth | 64mm（2.52inch） |
| Front Mount Baffle Cutout | 179mm（7.04inch） |
| Mouting Depth | 58mm（2.28inch） |
| Motor Diameter | 90mm（3.54inch） |
|
Name Value Unit Comment |
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|
Electrical Parameters |
|
|
|
|
Re |
3.32 |
Ohm |
electrical voice coil resistance at DC |
|
Le |
0.026 |
mH |
frequency independent part of voice coil inductance |
|
L2 |
0.312 |
mH |
para-inductance of voice coil |
|
R2 |
2.40 |
Ohm |
electrical resistance due to eddy current losses |
|
Cmes |
204.59 |
μF |
electrical capacitance representing moving mass |
|
Lces |
6.47 |
mH |
electrical inductance representing driver compliance |
|
Res |
23.09 |
Ohm |
resistance due to mechanical losses |
|
fs |
138.3 |
Hz |
driver resonance frequency |
|
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|
Mechanical Parameters |
|
|
|
|
(using laser) |
|
|
|
|
Mms |
13.031 |
g |
mechanical mass of driver diaphragm assembly including air load and voice coil |
|
Mmd (Sd) |
9.497 |
g |
mechanical mass of voice coil and diaphragm without air load |
|
Rms |
2.759 |
kg/s |
mechanical resistance of total-driver losses |
|
Cms |
0.102 |
mm/N |
mechanical compliance of driver suspension |
|
Kms |
9.85 |
N/mm |
mechanical stiffness of driver suspension |
|
Bl |
7.981 |
N/A |
force factor (Bl product) |
|
Lambda s |
0.129 |
|
suspension creep factor |
|
Loss factors |
|
|
|
|
Qtp |
0.520 |
|
total Q-factor considering all losses |
|
Qms |
4.106 |
|
mechanical Q-factor of driver in free air considering Rms only |
|
Qes |
0.590 |
|
electrical Q-factor of driver in free air considering Re only |
|
Qts |
0.516 |
|
total Q-factor considering Re and Rms only |
|
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Other Parameters |
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|
Vas |
6.5715 |
l |
equivalent air volume of suspension |
|
n0 |
2.838 |
% |
reference efficiency (2 pi-radiation using Re) |
|
Lm |
96.55 |
dB |
characteristic sound pressure level (at 1 m for 1 W @ Re) |
|
Lnom |
97.37 |
dB |
nominal sensitivity (SPL at 1 m for 1 W @ Zn) |
|
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|
rmse Z |
4.61 |
% |
root-mean-square fitting error of driver impedance Z(f) |
|
rmse Hx |
3.14 |
% |
root-mean-square fitting error of transfer function Hx(f) |
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|
Series resistor |
0.00 |
Ohm |
resistance of series resistor |
|
Sd |
213.82 |
cm2 |
diaphragm area |
