Beyma 6MI90

• Sensitivity (1W, 1m, infinite baffle)SPL1W94.8dB
• Frequency response140 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air)fS134Hz
• Mechanical quality factorQMS8.40
• Electrical quality factorQES0.44
• Total quality factorQTS0.42

Large signal parameters

• Maximum linear excursionxmax2.5mm
• Air volume displaced at xmaxVD35cm³
• Power handlingP125W
• Program powerPmax250W

Voice Coil

• Nominal impedanceZ8Ω
• DC resistanceRE5.7Ω
• Inductance (1kHz)LE0.4mH
• VC Diameter38.1mm
• Winding heightHVC7.5mm

Magnet

• Force factorBl11.3N/A
• Motor constantBl/√RE4.73N/√W
• Air gap heightHAG6mm
• MaterialFerrite

Diaphragm

• Effective diameter134mm
• Effective areaSD140cm²
• Moving massMMS11g
• Moving mass (without air load)MMD9.8g

Suspensions

• StiffnessKMS8.26N/mm
• ComplianceCMS121µm/N
• Equivalent volume to the complianceVAS3.35L
• Mechanical resistanceRMS1.16N·s/m

Dimensions

• Nominal diameter6.5″
• 165mm
• Volume occupied by the driver (estimated)0.91L
• Net weight2.2kg