Lowther A55
Full-range
7″ / 174 mm
Nominal diameter
82 Hz
Resonance
0.36
Q factor
94 dB
Sensitivity
± 1 mm
Linear excursion
200 W
Program Power
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- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 94.1
- dB
- Frequency response
- 80 - 22000
- Hz
- Resonance frequency (free air)
- fS
- 82.0
- Hz
- Mechanical quality factor
- QMS
- 5.83
- Electrical quality factor
- QES
- 0.38
- Total quality factor
- QTS
- 0.36
- Maximum linear excursion
- xmax
- 1.0
- mm
- Air volume displaced at xmax
- VD
- 11
- 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
- 0.11
- mH
- VC Diameter
- 39
- mm
- Flux density
- B
- 1.98
- T
- Force factor
- Bl
- 9.71
- N/A
- Motor constant
- Bl/√RE
- 3.57
- N/√W
- Air gap height
- HAG
- 5
- mm
- Diameter
- 97
- mm
- Material
- Alcomax 3
- Effective diameter
- 116
- mm
- Effective area
- SD
- 106
- cm²
- Moving mass
- MMS
- 7.6
- g
- Moving mass (without air load)
- MMD
- 6.7
- g
- Material
- Twin Paper
- Stiffness
- KMS
- 3.72
- N/mm
- Compliance
- CMS
- 269
- µm/N
- Equivalent volume to the compliance
- VAS
- 4.25
- L
- Mechanical resistance
- RMS
- 0.67
- N·s/m
- Nominal diameter
- 7
- ″
- 174
- mm
- Overall diameter
- 174
- mm
- Baffle cutout diameter
- 137
- mm
- Overall depth
- 110
- mm
- Flange thickness
- 9
- mm
- Mounting depth
- 101
- mm
- Volume occupied by the driver (estimated)
- 0.78
- L
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
Export this driver to a simulation software:
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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