Eminence DELTA PRO 12-450-4

• 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