Precision Devices PD.123ER
Woofer
12″ / 300 mm
Nominal diameter
56 Hz
Resonance
0.29
Q factor
98 dB
Sensitivity
± 2.5 mm
Linear excursion
800 W
Program Power
![Precision Devices PD.123ER Woofer](/PrecisionDevices/PD.123ER/PrecisionDevices_PD.123ER_(Photo_1).jpg)
![Precision Devices PD.123ER Woofer](/PrecisionDevices/PD.123ER/PrecisionDevices_PD.123ER_(Photo_2).jpg)
- Sensitivity (1W, 1m, infinite baffle)
- SPL1W
- 98.1
- dB
- Frequency response
- 50 - 5000
- Hz
- Resonance frequency (free air)
- fS
- 55.9
- Hz
- Mechanical quality factor
- QMS
- 13.03
- Electrical quality factor
- QES
- 0.30
- Total quality factor
- QTS
- 0.29
- Maximum linear excursion
- xmax
- 2.5
- mm
- Air volume displaced at xmax
- VD
- 133
- cm³
- Power handling
- P
- 400
- W
- Program power
- Pmax
- 800
- W
- Nominal impedance
- Z
- 8
- Ω
- DC resistance
- RE
- 6.7
- Ω
- Inductance (1kHz)
- LE
- 0.25
- mH
- VC Diameter
- 76
- mm
- Winding height
- HVC
- 13
- mm
- Winding material
- Copper
- Former material
- Glass Fibre
- Flux density
- B
- 1.35
- T
- Force factor
- Bl
- 21.73
- N/A
- Motor constant
- Bl/√RE
- 8.37
- N/√W
- Air gap height
- HAG
- 9
- mm
- Material
- Ceramic
- Effective diameter
- 260
- mm
- Effective area
- SD
- 531
- cm²
- Moving mass
- MMS
- 58.9
- g
- Moving mass (without air load)
- MMD
- 49.8
- g
- Material
- Paper
- Stiffness
- KMS
- 7.25
- N/mm
- Compliance
- CMS
- 138
- µm/N
- Equivalent volume to the compliance
- VAS
- 54.5
- L
- Mechanical resistance
- RMS
- 1.59
- N·s/m
- Nominal diameter
- 12
- ″
- 300
- mm
- Overall diameter
- 330
- mm
- Baffle cutout diameter
- 282
- mm
- Overall depth
- 127
- mm
- Flange thickness
- 10
- mm
- Mounting depth
- 117
- mm
- Volume occupied by the driver (estimated)
- 3.4
- L
- Net weight
- 9.5
- kg
Thiele & Small parameters
Large signal parameters
Voice Coil
Magnet
Diaphragm
Suspensions
Dimensions
![Precision Devices PD.123ER SPL & Impedance](/PrecisionDevices/PD.123ER/PrecisionDevices_PD.123ER_(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)