Eminence TF-1250

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.4dB
• Frequency response 80 - 4400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 95Hz
• Mechanical quality factor QMS 8.50
• Electrical quality factor QES 0.98
• Total quality factor QTS 0.88

Large signal parameters

• Maximum linear excursion xmax 0.5mm
• Air volume displaced at xmax VD 24cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.2Ω
• Inductance (1kHz) LE 0.51mH
• VC Diameter 38mm
• Winding material Copper
• Former material Polyimide

Magnet

• Force factor Bl 11.4N/A
• Motor constant Bl/√RE 4.24N/√W
• Air gap height HAG 8mm
• Weight 0.85kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 29g
• Moving mass (without air load) MMD 20.6g
• Material Full molded paper

Suspensions

• Stiffness KMS 10N/mm
• Compliance CMS 100µm/N
• Equivalent volume to the compliance VAS 37.5L
• Mechanical resistance RMS 2.04N·s/m
• Surround material Paper

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 309mm
• Baffle cutout diameter 283mm
• Overall depth 126mm
• Volume occupied by the driver 1.93L
• Net weight 2.99kg
• Frame material Pressed steel