Eminence DELTA PRO 12-450-4
4Ω
8ΩWoofer
Nominal diameter | 12″ / 305 mm |
Resonance | 45 Hz |
Q factor | 0.39 |
Sensitivity | 96.4 dB |
Linear excursion | ± 5.2 mm |
Program Power | 900 W |
Discontinued
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 96.4dB
- Frequency response 45 - 3800Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 45Hz
- Mechanical quality factor QMS 7.97
- Electrical quality factor QES 0.41
- Total quality factor QTS 0.39
Large signal parameters
- Maximum linear excursion xmax 5.2mm
- Maximum excursion before damage xlim 13.7mm
- Air volume displaced at xmax VD 277cm³
- Power handling P 450W
- Program power Pmax 900W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.7Ω
- Inductance (1kHz) LE 0.45mH
- VC Diameter 64mm
- Winding material Aluminum
- Former material Polyimide
Magnet
- Force factor Bl 9.51N/A
- Motor constant Bl/√RE 4.98N/√W
- Air gap height HAG 7.9mm
- Weight 1.588kg
- Material Ferrite
Diaphragm
- Effective diameter 260mm
- Effective area SD 532cm²
- Moving mass MMS 36g
- Moving mass (without air load) MMD 27.2g
- Material Paper
Suspensions
- Stiffness KMS 2.86N/mm
- Compliance CMS 350µm/N
- Equivalent volume to the compliance VAS 138L
- Mechanical resistance RMS 1.28N·s/m
- Surround material Cloth
Dimensions
- Nominal diameter 12″
- 305mm
- Overall diameter 315mm
- Baffle cutout diameter 281mm
- Overall depth 140mm
- Volume occupied by the driver 2.25L
- Net weight 5.31kg
- Frame material Die-cast aluminum
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