HELIX COMPOSE Ci3 C165.2FM-S3
Mid Bass
6.5″ / 165 mm
Nominal diameter
72 Hz
Resonance
0.82
Q factor
88 dB
Sensitivity
± 3.2 mm
Linear excursion
150 W
Program Power
![HELIX Ci3 C165.2FM-S3 Mid Bass](/HELIX/Ci3_C165.2FM-S3/HELIX_Ci3_C165.2FM-S3_(Photo).jpg)
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 88.2
- dB
- Frequency response
- 60 - 25000
- Hz
- Resonance frequency (free air)
- fS
- 72.0
- Hz
- Mechanical quality factor
- QMS
- 4.02
- Electrical quality factor
- QES
- 1.04
- Total quality factor
- QTS
- 0.82
- Maximum linear excursion
- xmax
- 3.2
- mm
- Air volume displaced at xmax
- VD
- 43
- cm³
- Power handling
- P
- 100
- W
- Program power
- Pmax
- 150
- W
- Nominal impedance
- Z
- 3
- Ω
- DC resistance
- RE
- 3.1
- Ω
- Inductance (1kHz, estimated)
- LE
- 0.18
- mH
- VC Diameter
- 25
- mm
- Winding height
- HVC
- 10.5
- mm
- Force factor
- Bl
- 3.8
- N/A
- Motor constant
- Bl/√RE
- 2.16
- N/√W
- Effective diameter
- 130
- mm
- Effective area
- SD
- 133
- cm²
- Moving mass
- MMS
- 10.4
- g
- Moving mass (without air load)
- MMD
- 9.3
- g
- Stiffness
- KMS
- 2.15
- N/mm
- Compliance
- CMS
- 466
- µm/N
- Equivalent volume to the compliance
- VAS
- 11.5
- L
- Mechanical resistance
- RMS
- 1.17
- N·s/m
- Nominal diameter
- 6.5
- ″
- 165
- mm
- Overall diameter
- 165
- mm
- Baffle cutout diameter
- 142
- mm
- Mounting depth
- 61
- mm
- Volume occupied by the driver (estimated)
- 0.5
- L
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
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)