Lowther PM4
8Ω
Full-range
| Nominal diameter | 8″ / 225 mm |
| Resonance | 45 Hz |
| Q factor | 0.16 |
| Sensitivity | 98.7 dB |
| Linear excursion | ± 1 mm |
| Program Power | 200 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 98.7dB
- Frequency response 30 - 20000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 45Hz
- Mechanical quality factor QMS 3.75
- Electrical quality factor QES 0.17
- Total quality factor QTS 0.16
Large signal parameters
- Maximum linear excursion (one way) xmax 1mm
- Air volume displaced at xmax VD 21cm³
- Power handling P 100W
- Program power Pmax 200W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 7.4Ω
- Inductance (1kHz) LE 0.023mH
- VC Diameter 39mm
Magnet
- Flux density B 2.4T
- Force factor Bl 12.5N/A
- Motor constant Bl/√RE 4.6N/√W
- Air gap height HAG 5mm
- Diameter 128mm
- Material Alcomax 3
Diaphragm
- Effective diameter 164mm
- Effective area SD 210cm²
- Moving mass MMS 12.8g
- Moving mass (without air load) MMD 10.4g
- Material Twin Paper
Suspensions
- Stiffness KMS 1.03N/mm
- Compliance CMS 966µm/N
- Equivalent volume to the compliance VAS 60.5L
- Mechanical resistance RMS 0.96N·s/m
Dimensions
- Nominal diameter 8″
- 225mm
- Overall diameter 225mm
- Baffle cutout diameter 190mm
- Overall depth 155mm
- Flange thickness 13mm
- Mounting depth 142mm
- Volume occupied by the driver (estimated) 1.7L
Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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