Magnet and voice coil parameters: | |||
Voice coil diameter | d | (mm) | 51 |
Voice coil length | h | (mm) | 33 |
Voice coil layers | n | 4 | |
Flux density in gap | B | (T) | 1.04 |
Total useful flux | (mWb) | 2.50 | |
Height of the gap | hg | (mm) | 8 |
Diameter of magnet | dm | (mm) | 147 |
Height of magnet | hm | (mm) | 35 |
Weight of magnet | (kg) | 2.42 |
SWR 308 | |||||
Thiele Small parameters: | Free air | Common | Baffled | ||
Nominal impedance | Zn | (ohm) | 8 | ||
Minimum impedance/at freq. | Zmin | (ohm/Hz) | 4.7/106 | ||
Maximum impedance | Zo | (ohm) | 64.2 | ||
DC resistance | Re | (ohm) | 3.5 | ||
Voice coil inductance | Le | (mH) | 4.2 | ||
Capacitor in series with 8 ohm (for impedance compensation) |
Cc | (µF) | 38 | ||
Resonance Frequency | fs | (Hz) | 18.1 | 18.1 | |
Mechanical Q factor | Qms | 3.70 | 3.70 | ||
Electrical Q factor | Qes | 0.21 | 0.21 | ||
Total Q factor | Qts | 0.20 | 0.20 | ||
F (Ratio fs/Qts) | F | (Hz) | 90 | ||
Mechanical resistance | Rms | (Kg/s) | 5.12 | ||
Moving mass | Mms | (g) | 166.3 | 166.4 | |
Suspension compliance | Cms | (mm/N) | 0.46 | ||
Effective cone diameter | D | (cm) | 24.4 | ||
Effective piston area | Sd | (cm²) | 466 | ||
Equivalent volume | VAS | (ltrs) | 139.2 | ||
Force factor | Bl | (N/A) | 17.6 | ||
Reference voltage sensitivity Re 2.83V 1m at 106 Hz (Measured) |
(dB) | 90.6 |