Eminence DELTA-12A

• Sensitivity (1W, 1m, infinite baffle)SPL1W96.2dB
• Frequency response54 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air)fS55Hz
• Mechanical quality factorQMS5.27
• Electrical quality factorQES0.46
• Total quality factorQTS0.43

Large signal parameters

• Maximum linear excursionxmax2.4mm
• Maximum excursion before damagexlim9.9mm
• Air volume displaced at xmaxVD125cm³
• Power handlingP400W
• Program powerPmax800W

Voice Coil

• Nominal impedanceZ8Ω
• DC resistanceRE6.3Ω
• Inductance (1kHz)LE0.74mH
• VC Diameter64mm
• Winding materialAluminum
• Former materialPolyimide

Magnet

• Force factorBl13.5N/A
• Motor constantBl/√RE5.38N/√W
• Air gap heightHAG9.5mm
• Weight1.588kg
• MaterialFerrite

Diaphragm

• Effective diameter257mm
• Effective areaSD520cm²
• Moving massMMS39g
• Moving mass (without air load)MMD30.7g
• MaterialPaper

Suspensions

• StiffnessKMS4.76N/mm
• ComplianceCMS210µm/N
• Equivalent volume to the complianceVAS81.3L
• Mechanical resistanceRMS2.56N·s/m
• Surround materialCloth

Dimensions

• Nominal diameter12″
• 305mm
• Overall diameter306mm
• Baffle cutout diameter281mm
• Overall depth136mm
• Volume occupied by the driver2.25L
• Net weight5.17kg
• Frame materialPressed steel