Eminence DELTA-12B

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.3dB
• Frequency response 65 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 58Hz
• Mechanical quality factor QMS 7.04
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.48

Large signal parameters

• Maximum linear excursion xmax 2.7mm
• Maximum excursion before damage xlim 9mm
• Air volume displaced at xmax VD 140cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 16Ω
• DC resistance RE 11.4Ω
• Inductance (1kHz) LE 0.77mH
• VC Diameter 63.5mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 16N/A
• Motor constant Bl/√RE 4.74N/√W
• Air gap height HAG 9.5mm
• Weight 1.588kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 32g
• Moving mass (without air load) MMD 23.7g
• Material Paper

Suspensions

• Stiffness KMS 4.35N/mm
• Compliance CMS 230µm/N
• Equivalent volume to the compliance VAS 87L
• Mechanical resistance RMS 1.66N·s/m
• Surround material Cloth

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 306mm
• Baffle cutout diameter 281mm
• Overall depth 136mm
• Volume occupied by the driver 2.24L
• Net weight 5.171kg
• Frame material Pressed Steel