Beyma 18LEX1200Fe

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.8dB
• Frequency response 40 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 12.20
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 11mm
• Maximum excursion before damage xlim 48mm
• Air volume displaced at xmax VD 1381cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 1.21mH
• VC Diameter 101.6mm
• Winding height HVC 27mm

Magnet

• Force factor Bl 23.2N/A
• Motor constant Bl/√RE 10.1N/√W
• Air gap height HAG 12mm

Diaphragm

• Effective diameter 400mm
• Effective area SD 1255cm²
• Moving mass MMS 200g
• Moving mass (without air load) MMD 170g

Suspensions

• Stiffness KMS 8.07N/mm
• Compliance CMS 124µm/N
• Equivalent volume to the compliance VAS 277L
• Mechanical resistance RMS 3.2N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 462mm
• Baffle cutout diameter 415mm
• Overall depth 225mm
• Volume occupied by the driver (estimated) 7.9L
• Net weight 14.0kg