Eminence SIGMA PRO 18A-2
Subwoofer
18″ / 457 mm
Nominal diameter
28 Hz
Resonance
0.29
Q factor
96 dB
Sensitivity
± 6.1 mm
Linear excursion
1300 W
Program Power
![Eminence SIGMA PRO 18A-2 Subwoofer](/Eminence/SIGMA_PRO_18A-2/Eminence_SIGMA_PRO_18A-2_(Photo_1).jpg)
![Eminence SIGMA PRO 18A-2 Subwoofer](/Eminence/SIGMA_PRO_18A-2/Eminence_SIGMA_PRO_18A-2_(Photo_2).jpg)
![Eminence SIGMA PRO 18A-2 Subwoofer](/Eminence/SIGMA_PRO_18A-2/Eminence_SIGMA_PRO_18A-2_(Photo_3).jpg)
- Parts Express
- $$$
- Amazon.com
- $$$
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 96.2
- dB
- Frequency response
- 41 - 2400
- Hz
- Resonance frequency (free air)
- fS
- 28.0
- Hz
- Mechanical quality factor
- QMS
- 8.28
- Electrical quality factor
- QES
- 0.30
- Total quality factor
- QTS
- 0.29
- Maximum linear excursion
- xmax
- 6.1
- mm
- Maximum excursion before damage
- xlim
- 18.0
- mm
- Air volume displaced at xmax
- VD
- 695
- cm³
- Power handling
- P
- 650
- W
- Program power
- Pmax
- 1300
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 6.3
- Ω
- Inductance (1kHz)
- LE
- 1.9
- mH
- VC Diameter
- 76
- mm
- Winding material
- Copper
- Former material
- Polyimide
- Force factor
- Bl
- 22.1
- N/A
- Motor constant
- Bl/√RE
- 8.81
- N/√W
- Air gap height
- HAG
- 9.5
- mm
- Weight
- 3.402
- kg
- Material
- Ferrite
- Effective diameter
- 381
- mm
- Effective area
- SD
- 1140
- cm²
- Moving mass
- MMS
- 130
- g
- Moving mass (without air load)
- MMD
- 102.7
- g
- Material
- Paper
- Stiffness
- KMS
- 4.17
- N/mm
- Compliance
- CMS
- 240
- µm/N
- Equivalent volume to the compliance
- VAS
- 441
- L
- Mechanical resistance
- RMS
- 2.76
- N·s/m
- Surround material
- Cloth
- Nominal diameter
- 18
- ″
- 457
- mm
- Overall diameter
- 457
- mm
- Baffle cutout diameter
- 421
- mm
- Overall depth
- 207
- mm
- Volume occupied by the driver
- 6.62
- L
- Net weight
- 11.11
- kg
- Frame material
- Die-cast aluminum
Available on (affiliate links)
Specifications
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
![Eminence SIGMA PRO 18A-2 SPL & Impedance](/Eminence/SIGMA_PRO_18A-2/Eminence_SIGMA_PRO_18A-2_(Frequency_response_+_Impedance).png)
Export this driver to a simulation software:
![WinISD](/images/export/WinISD.png)
![Basta!](/images/export/Basta.png)
![Hornresp](/images/export/Hornresp.png)
![QSpeakers](/images/export/QSpeakers.png)
![SpeakerSim](/images/export/SpeakerSim.png)
![MfbLabs](/images/export/MfbLabs.png)
![Speakerbench](/images/export/Speakerbench.png)