Lowther PM4
Full-range
8″ / 225 mm
Nominal diameter
45 Hz
Resonance
0.16
Q factor
99 dB
Sensitivity
± 1 mm
Linear excursion
200 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 98.7
- dB
- Frequency response
- 30 - 20000
- Hz
- Resonance frequency (free air)
- fS
- 45.0
- Hz
- Mechanical quality factor
- QMS
- 3.75
- Electrical quality factor
- QES
- 0.17
- Total quality factor
- QTS
- 0.16
- Maximum linear excursion
- xmax
- 1.0
- mm
- Air volume displaced at xmax
- VD
- 21
- cm³
- Power handling
- P
- 100
- W
- Program power
- Pmax
- 200
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 7.4
- Ω
- Inductance (1kHz)
- LE
- 0.02
- mH
- VC Diameter
- 39
- mm
- Flux density
- B
- 2.4
- T
- Force factor
- Bl
- 12.51
- N/A
- Motor constant
- Bl/√RE
- 4.6
- N/√W
- Air gap height
- HAG
- 5
- mm
- Diameter
- 128
- mm
- Material
- Alcomax 3
- Effective diameter
- 164
- mm
- Effective area
- SD
- 210
- cm²
- Moving mass
- MMS
- 12.8
- g
- Moving mass (without air load)
- MMD
- 10.4
- g
- Material
- Twin Paper
- Stiffness
- KMS
- 1.03
- N/mm
- Compliance
- CMS
- 966
- µm/N
- Equivalent volume to the compliance
- VAS
- 60.5
- L
- Mechanical resistance
- RMS
- 0.96
- N·s/m
- Nominal diameter
- 8
- ″
- 225
- mm
- Overall diameter
- 225
- mm
- Baffle cutout diameter
- 190
- mm
- Overall depth
- 155
- mm
- Flange thickness
- 13
- mm
- Mounting depth
- 142
- mm
- Volume occupied by the driver (estimated)
- 1.7
- L
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
Export this driver to a simulation software:
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WinISD
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