Beyma 8BR40/N

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.6dB
• Frequency response 30 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 2.10
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.39

Large signal parameters

• Maximum linear excursion xmax 6.7mm
• Maximum excursion before damage xlim 20mm
• Air volume displaced at xmax VD 147cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 25.4mm
• Winding height HVC 16mm

Magnet

• Force factor Bl 6.8N/A
• Motor constant Bl/√RE 2.9N/√W
• Air gap height HAG 6mm

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 21g
• Moving mass (without air load) MMD 18.6g

Suspensions

• Stiffness KMS 0.769N/mm
• Compliance CMS 1300µm/N
• Equivalent volume to the compliance VAS 89.1L
• Mechanical resistance RMS 2N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 212mm
• Baffle cutout diameter 181mm
• Overall depth 89mm
• Volume occupied by the driver (estimated) 0.57L
• Net weight 1.3kg