Beyma 18LEX1200Nd

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.8dB
• Frequency response 40 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36Hz
• Mechanical quality factor QMS 10.90
• Electrical quality factor QES 0.35
• Total quality factor QTS 0.34

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 1.7mH
• VC Diameter 101.6mm
• Winding height HVC 27mm

Magnet

• Force factor Bl 26.4N/A
• Motor constant Bl/√RE 11.5N/√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 10.2N/mm
• Compliance CMS 98µm/N
• Equivalent volume to the compliance VAS 219L
• Mechanical resistance RMS 4.1N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 462mm
• Baffle cutout diameter 415mm
• Overall depth 225mm
• Volume occupied by the driver (estimated) 5.9L
• Net weight 9.0kg