Beyma 3FR30V2

• Sensitivity (1W, 1m, infinite baffle)SPL1W87dB
• Frequency response135 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air)fS133Hz
• Mechanical quality factorQMS5.90
• Electrical quality factorQES0.56
• Total quality factorQTS0.51

Large signal parameters

• Maximum linear excursionxmax2mm
• Air volume displaced at xmaxVD6cm³
• Power handlingP30W
• Program powerPmax60W

Voice Coil

• Nominal impedanceZ8Ω
• DC resistanceRE5.8Ω
• Inductance (1kHz)LE0.16mH
• VC Diameter20.3mm
• Winding heightHVC6mm

Magnet

• Force factorBl4.5N/A
• Motor constantBl/√RE1.87N/√W
• Air gap heightHAG5mm

Diaphragm

• Effective diameter62mm
• Effective areaSD30cm²
• Moving massMMS2.3g
• Moving mass (without air load)MMD2.2g

Suspensions

• StiffnessKMS1.6N/mm
• ComplianceCMS624µm/N
• Equivalent volume to the complianceVAS1L
• Mechanical resistanceRMS0.32N·s/m

Dimensions

• Nominal diameter3″
• 77mm
• Overall diameter94mm
• Baffle cutout diameter75mm
• Overall depth52mm
• Volume occupied by the driver (estimated)0.14L
• Net weight0.57kg