Beyma 3FR30V2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87dB
• Frequency response 135 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 133Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.56
• Total quality factor QTS 0.51

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 6cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.16mH
• VC Diameter 20.3mm
• Winding height HVC 6mm

Magnet

• Force factor Bl 4.5N/A
• Motor constant Bl/√RE 1.87N/√W
• Air gap height HAG 5mm

Diaphragm

• Effective diameter 62mm
• Effective area SD 30cm²
• Moving mass MMS 2.3g
• Moving mass (without air load) MMD 2.2g

Suspensions

• Stiffness KMS 1.6N/mm
• Compliance CMS 624µm/N
• Equivalent volume to the compliance VAS 1L
• Mechanical resistance RMS 0.32N·s/m

Dimensions

• Nominal diameter 3″
• 77mm
• Overall diameter 94mm
• Baffle cutout diameter 75mm
• Overall depth 52mm
• Volume occupied by the driver (estimated) 0.14L
• Net weight 0.57kg