P.Audio SD21-125XB
8Ω
Low frequency
| Nominal diameter | 21″ / 533 mm |
| Resonance | 35 Hz |
| Q factor | 0.38 |
| Sensitivity | 95.3 dB |
| Linear excursion | ± 11.3 mm |
| Program power | 3600 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 95.3dB
- Frequency response 30 - 200Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 35Hz
- Mechanical quality factor QMS 10.00
- Electrical quality factor QES 0.40
- Total quality factor QTS 0.38
Large signal parameters
- Maximum linear excursion (one way) xmax 11.3mm
- Air volume displaced at xmax VD 1851cm³
- Power handling P 1800W
- Program power Pmax 3600W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 5.2Ω
- Inductance (1kHz) LE 1.31mH
- VC Diameter 127mm
- Winding height HVC 36.1mm
- Winding material Copper Wire
- Former material Glass Fiber
Magnet
- Flux density B 1.2T
- Force factor Bl 30.4N/A
- Motor constant Bl/√RE 13.3N/√W
- Air gap height HAG 13.5mm
- Material Ferrite
Diaphragm
- Effective diameter 395mm
- Effective area SD 1645cm²
- Moving mass (including air load) MMS 334g
- Moving mass MMD 287g
- Material Paper
Suspensions
- Stiffness KMS 15.6N/mm
- Compliance CMS 64µm/N
- Equivalent volume to the compliance VAS 346L
- Mechanical resistance RMS 7.34N·s/m
- Surround material Cloth
- Spider material Double Silicone
Dimensions
- Nominal diameter 21″
- 533mm
- Overall diameter 539mm
- Baffle cutout diameter 491mm
- Overall depth 286mm
- Flange thickness 18mm
- Mounting depth 268mm
- Volume occupied by the driver (estimated) 13L
- Frame material Aluminium
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Export this driver to a box design software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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