8MA-NEO-BT
Black aluminium basket
Paper cone cloth edge
1.75KCCAW voice coil
12.8Oz NEO Magnet
Frequency : 78-6.9K/Hz
RMS power:350Watts
Impedance 4OHMS
Sensiticity:99.8dB
| Specifications | |
| Nominal Diameter | 8 inch |
| Nominal Impedance | 4 ohms |
| RMS Power Handing | 350W |
| MAX Power Handing | 700W |
| Sensitivity (1w/1m) | 99.8dB |
| Frequency Response | 78-6.9KHZ |
| Motor | |
| Voice Coil Diameter | 45.85mm（1.75inch) |
| Voice Coil Former Material | KC |
| Winding Material | CCAW |
| Cone Material | Paper |
| Dust Cap Material | Aluminium |
| Surround Material | cloth edge |
| Basket Material | Aluminum |
| Magnet Material | NEO |
| Magnet Weight | 12.8 OZ |
| Displacement Volume |
| Thiele & Small Parameters | |
| Equivilant Volume | Vas 2.359L |
| Excursion (one way) | Xmax mm |
| Free Air Resonance | Fs 216 Hz |
| Mechanical Factor | Qms 3.863 |
| Electrical Factor | Qes 0.506 |
| Total Factor | Qts 0.447 |
| Moving Mass | Mms 14.879g |
| Compliance | Cms 0.036mM/N |
| Bl Factor | Bl 14.506 |
| Diaphragm Area | Sd 213.82 cm² |
| Dc Resistance | Re 5.3 ohms |
| Measurement | |
| Overall Diameter | 211.5mm（8.3inch） |
| Overall Depth | 94mm（3.69inch） |
| Front Mount Baffle Cutout | 180.5mm（7.1inch） |
| Mouting Depth | 85mm（3.34inch） |
| Motor Diameter | 100mm（3.93inch） |
KLIPPEL ANALYZER SYSTEM
Report 
Table Linear Parameters
|
Name Value Unit Comment |
|||
|
Electrical Parameters |
|
|
|
|
Re |
5.27 |
Ohm |
electrical voice coil resistance at DC |
|
Le |
0.039 |
mH |
frequency independent part of voice coil inductance |
|
L2 |
0.344 |
mH |
para-inductance of voice coil |
|
R2 |
4.33 |
Ohm |
electrical resistance due to eddy current losses |
|
Cmes |
70.71 |
μF |
electrical capacitance representing moving mass |
|
Lces |
7.67 |
mH |
electrical inductance representing driver compliance |
|
Res |
40.24 |
Ohm |
resistance due to mechanical losses |
|
fs |
216.1 |
Hz |
driver resonance frequency |
|
|
|||
|
Mechanical Parameters |
|
|
|
|
(using laser) |
|
|
|
|
Mms |
14.879 |
g |
mechanical mass of driver diaphragm assembly including air load and voice coil |
|
Mmd (Sd) |
11.345 |
g |
mechanical mass of voice coil and diaphragm without air load |
|
Rms |
5.229 |
kg/s |
mechanical resistance of total-driver losses |
|
Cms |
0.036 |
mm/N |
mechanical compliance of driver suspension |
|
Kms |
27.43 |
N/mm |
mechanical stiffness of driver suspension |
|
Bl |
14.506 |
N/A |
force factor (Bl product) |
|
Lambda s |
0.218 |
|
suspension creep factor |
|
Loss factors |
|
|
|
|
Qtp |
0.451 |
|
total Q-factor considering all losses |
|
Qms |
3.863 |
|
mechanical Q-factor of driver in free air considering Rms only |
|
Qes |
0.506 |
|
electrical Q-factor of driver in free air considering Re only |
|
Qts |
0.447 |
|
total Q-factor considering Re and Rms only |
|
|
|||
|
Other Parameters |
|
|
|
|
Vas |
2.3590 |
l |
equivalent air volume of suspension |
|
n0 |
4.524 |
% |
reference efficiency (2 pi-radiation using Re) |
|
Lm |
98.58 |
dB |
characteristic sound pressure level (at 1 m for 1 W @ Re) |
|
Lnom |
97.38 |
dB |
nominal sensitivity (SPL at 1 m for 1 W @ Zn) |
|
|
|||
|
rmse Z |
7.53 |
% |
root-mean-square fitting error of driver impedance Z(f) |
|
rmse Hx |
5.13 |
% |
root-mean-square fitting error of transfer function Hx(f) |
|
|
|||
|
Series resistor |
0.00 |
Ohm |
resistance of series resistor |
|
Sd |
213.82 |
cm2 |
diaphragm area |
