8MRA-FE-V1.75
Black aluminium basket
Paper cone cloth edge
1.75KCCAW voice coil
46Oz Ferrite Magnet
Frequency : 85-6.8K/Hz
RMS power:300Watts
Impedance 4OHMS
Sensiticity:98.8dB
| Specifications | |
| Nominal Diameter | 8 inch |
| Nominal Impedance | 4 ohms |
| RMS Power Handing | 300W |
| MAX Power Handing | 600W |
| Sensitivity (1w/1m) | 98.8dB |
| Frequency Response | 85-6.8KHZ |
| Motor | |
| Voice Coil Diameter | 45.85mm（1.75inch) |
| Voice Coil Former Material | KC |
| Winding Material | CCAW |
| Cone Material | Paper |
| Dust Cap Material | Paper |
| Surround Material | cloth edge |
| Basket Material | Aluminum |
| Magnet Material | Ferrite |
| Magnet Weight | 46 OZ |
| Displacement Volume |
| Thiele & Small Parameters | |
| Equivilant Volume | Vas 3.0692L |
| Excursion (one way) | Xmax mm |
| Free Air Resonance | Fs 169 Hz |
| Mechanical Factor | Qms 1.918 |
| Electrical Factor | Qes 0.590 |
| Total Factor | Qts 0.451 |
| Moving Mass | Mms 18.57g |
| Compliance | Cms 0.047mM/N |
| Bl Factor | Bl 12.888 |
| Diaphragm Area | Sd 213.82 cm² |
| Dc Resistance | Re 5 ohms |
| Measurement | |
| Overall Diameter | 210mm（8.25inch） |
| Overall Depth | 110mm（4.32inch） |
| Front Mount Baffle Cutout | 183mm（7.19inch） |
| Mouting Depth | 97mm（3.81inch） |
| Motor Diameter | 140mm（5.5inch） |
KLIPPEL ANALYZER SYSTEM
Report 
Table Linear Parameters
|
Name Value Unit Comment |
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|
Electrical Parameters |
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|
Re |
4.96 |
Ohm |
electrical voice coil resistance at DC |
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|
Le |
0.049 |
mH |
frequency independent part of voice coil inductance |
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|
L2 |
0.458 |
mH |
para-inductance of voice coil |
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|
R2 |
4.64 |
Ohm |
electrical resistance due to eddy current losses |
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|
Cmes |
111.80 |
μF |
electrical capacitance representing moving mass |
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|
Lces |
7.88 |
mH |
electrical inductance representing driver compliance |
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|
Res |
16.10 |
Ohm |
resistance due to mechanical losses |
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|
fs |
169.6 |
Hz |
driver resonance frequency |
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|
Mechanical Parameters |
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|
(using laser) |
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Mms |
18.570 |
g |
mechanical mass of driver diaphragm assembly including air load and voice coil |
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|
Mmd (Sd) |
15.037 |
g |
mechanical mass of voice coil and diaphragm without air load |
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|
Rms |
10.319 |
kg/s |
mechanical resistance of total-driver losses |
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|
Cms |
0.047 |
mm/N |
mechanical compliance of driver suspension |
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|
Kms |
21.08 |
N/mm |
mechanical stiffness of driver suspension |
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|
Bl |
12.888 |
N/A |
force factor (Bl product) |
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|
Lambda s |
0.109 |
|
suspension creep factor |
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Loss factors |
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|
Qtp |
0.455 |
|
total Q-factor considering all losses |
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|
Qms |
1.918 |
|
mechanical Q-factor of driver in free air considering Rms only |
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|
Qes |
0.590 |
|
electrical Q-factor of driver in free air considering Re only |
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|
Qts |
0.451 |
|
total Q-factor considering Re and Rms only |
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Other Parameters |
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|
Vas |
3.0692 |
l |
equivalent air volume of suspension |
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|
n0 |
2.437 |
% |
reference efficiency (2 pi-radiation using Re) |
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|
Lm |
95.89 |
dB |
characteristic sound pressure level (at 1 m for 1 W @ Re) |
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|
Lnom |
97.97 |
dB |
nominal sensitivity (SPL at 1 m for 1 W @ Zn) |
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|
rmse Z |
5.72 |
% |
root-mean-square fitting error of driver impedance Z(f) |
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|
rmse Hx |
3.88 |
% |
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 |
213.82 |
cm2 |
diaphragm area |
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