Eminence IMPERO 18A
4Ω
8Ω
Subwoofer
18″ / 457 mm
Nominal diameter
33 Hz
Resonance
0.43
Q factor
95 dB
Sensitivity
± 8 mm
Linear excursion
2400 W
Program Power
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 95.1
- dB
- Frequency response
- 39 - 800
- Hz
- Resonance frequency (free air)
- fS
- 33.0
- Hz
- Mechanical quality factor
- QMS
- 14.02
- Electrical quality factor
- QES
- 0.44
- Total quality factor
- QTS
- 0.43
- Maximum linear excursion
- xmax
- 8.0
- mm
- Maximum excursion before damage
- xlim
- 20.2
- mm
- Air volume displaced at xmax
- VD
- 927
- cm³
- Power handling
- P
- 1200
- W
- Program power
- Pmax
- 2400
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 5.4
- Ω
- Inductance (1kHz)
- LE
- 1.47
- mH
- VC Diameter
- 102
- mm
- Winding material
- Copper
- Former material
- Glass Fiber
- Force factor
- Bl
- 18.9
- N/A
- Motor constant
- Bl/√RE
- 8.13
- N/√W
- Air gap height
- HAG
- 12.7
- mm
- Weight
- 3.09
- kg
- Material
- Ferrite
- Effective diameter
- 384
- mm
- Effective area
- SD
- 1159
- cm²
- Moving mass
- MMS
- 140
- g
- Moving mass (without air load)
- MMD
- 112.2
- g
- Material
- Water resistant paper
- Stiffness
- KMS
- 5.88
- N/mm
- Compliance
- CMS
- 170
- µm/N
- Equivalent volume to the compliance
- VAS
- 317
- L
- Mechanical resistance
- RMS
- 2.07
- N·s/m
- Surround material
- Treated cloth
- Nominal diameter
- 18
- ″
- 457
- mm
- Overall diameter
- 457
- mm
- Baffle cutout diameter
- 421
- mm
- Overall depth
- 211
- mm
- Volume occupied by the driver
- 6.7
- L
- Net weight
- 12.38
- kg
- Frame material
- Die-cast aluminum