Goldwood GW-S650/4
4Ω
8ΩWoofer
6.5″ / 178 mm
Nominal diameter
55 Hz
Resonance
0.71
Q factor
87 dB
Sensitivity
± 2 mm
Linear excursion
170 W
Program Power
![Goldwood GW-S650/4 Woofer](/Goldwood/GW-S650_4/Goldwood_GW-S650_4_(Photo_1).jpg)
![Goldwood GW-S650/4 Woofer](/Goldwood/GW-S650_4/Goldwood_GW-S650_4_(Photo_2).jpg)
![Goldwood GW-S650/4 Woofer](/Goldwood/GW-S650_4/Goldwood_GW-S650_4_(Photo_3).jpg)
- Parts Express
- $$
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 86.5
- dB
- Frequency response
- 35 - 5000
- Hz
- Resonance frequency (free air)
- fS
- 55.0
- Hz
- Mechanical quality factor
- QMS
- 3.79
- Electrical quality factor
- QES
- 0.87
- Total quality factor
- QTS
- 0.71
- Maximum linear excursion
- xmax
- 2.0
- mm
- Air volume displaced at xmax
- VD
- 28
- cm³
- Power handling
- P
- 85
- W
- Program power
- Pmax
- 170
- W
- Nominal impedance
- Z
- 4
- Ω
- DC resistance
- RE
- 3.7
- Ω
- Inductance (1kHz)
- LE
- 0.3
- mH
- VC Diameter
- 25
- mm
- Winding material
- Aluminum
- Force factor
- Bl
- 4.61
- N/A
- Motor constant
- Bl/√RE
- 2.4
- N/√W
- Weight
- 0.567
- kg
- Effective diameter
- 133
- mm
- Effective area
- SD
- 140
- cm²
- Moving mass
- MMS
- 14.6
- g
- Moving mass (without air load)
- MMD
- 13.3
- g
- Material
- Poly
- Stiffness
- KMS
- 1.74
- N/mm
- Compliance
- CMS
- 574
- µm/N
- Equivalent volume to the compliance
- VAS
- 15.7
- L
- Mechanical resistance
- RMS
- 1.33
- N·s/m
- Surround material
- Rubber
- Nominal diameter
- 6.5
- ″
- 178
- mm
- Overall diameter
- 178
- mm
- Baffle cutout diameter
- 149
- mm
- Mounting depth
- 73
- mm
- Volume occupied by the driver (estimated)
- 0.52
- L
- Net weight
- 1.304
- kg
- Frame material
- Stamped Steel
Available on (affiliate link)
Specifications
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
![Goldwood GW-S650/4 SPL & Impedance](/Goldwood/GW-S650_4/Goldwood_GW-S650_4_(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)