Fi Car Audio Alpha v2 15 S4
2Ω
4Ω
Subwoofer
15″ / 397 mm
Nominal diameter
39 Hz
Resonance
0.56
Q factor
90 dB
Sensitivity
± 16 mm
Linear excursion
1500 W
Program Power
Discontinued
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 90.3
- dB
- Resonance frequency (free air)
- fS
- 39.0
- Hz
- Mechanical quality factor
- QMS
- 6.89
- Electrical quality factor
- QES
- 0.61
- Total quality factor
- QTS
- 0.56
- Maximum linear excursion
- xmax
- 16.0
- mm
- Air volume displaced at xmax
- VD
- 1296
- cm³
- Power handling
- P
- 750
- W
- Program power
- Pmax
- 1500
- W
- Nominal impedance
- Z
- 4
- Ω
- DC resistance
- RE
- 3.1
- Ω
- Inductance (1kHz, estimated)
- LE
- 1.13
- mH
- Force factor
- Bl
- 16.0
- N/A
- Motor constant
- Bl/√RE
- 9.09
- N/√W
- Effective diameter
- 321
- mm
- Effective area
- SD
- 810
- cm²
- Moving mass
- MMS
- 211.8
- g
- Moving mass (without air load)
- MMD
- 195
- g
- Stiffness
- KMS
- 12.99
- N/mm
- Compliance
- CMS
- 77
- µm/N
- Equivalent volume to the compliance
- VAS
- 72.1
- L
- Mechanical resistance
- RMS
- 7.53
- N·s/m
- Nominal diameter
- 15
- ″
- 397
- mm
- Overall diameter
- 397
- mm
- Baffle cutout diameter
- 359
- mm
- Mounting depth
- 210
- mm
- Volume occupied by the driver
- 3.96
- L