Dayton Audio Classic DCS305-4

• Sensitivity (1W, 1m, infinite baffle)SPL1W86.8dB
• Frequency response23 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air)fS24.2Hz
• Mechanical quality factorQMS5.07
• Electrical quality factorQES0.43
• Total quality factorQTS0.40

Large signal parameters

• Maximum linear excursionxmax9.3mm
• Air volume displaced at xmaxVD464cm³
• Power handlingP250W
• Program powerPmax500W

Voice Coil

• Nominal impedanceZ4Ω
• DC resistanceRE3.3Ω
• Inductance (1kHz)LE2.06mH
• VC Diameter65.5mm
• Winding materialCopper
• Former materialKapton® / Polyimide

Magnet

• Force factorBl13.7N/A
• Motor constantBl/√RE7.54N/√W
• MaterialFerrite

Diaphragm

• Effective diameter252mm
• Effective areaSD499cm²
• Moving massMMS160g
• Moving mass (without air load)MMD152g
• MaterialPaper / Kevlar

Suspensions

• StiffnessKMS3.7N/mm
• ComplianceCMS270µm/N
• Equivalent volume to the complianceVAS92.3L
• Mechanical resistanceRMS4.8N·s/m
• Surround materialRubber

Dimensions

• Nominal diameter12″
• 306mm
• Overall diameter306mm
• Baffle cutout diameter275mm
• Overall depth153mm
• Volume occupied by the driver (estimated)2.6L
• Frame materialSteel