Beyma 18PW1400Fe/S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.8dB
• Frequency response 25 - 1800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 10.20
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 10mm
• Maximum excursion before damage xlim 55mm
• Air volume displaced at xmax VD 1255cm³
• Power handling P 1400W
• Program power Pmax 2800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 1.2mH
• VC Diameter 101.6mm
• Winding height HVC 25mm

Magnet

• Force factor Bl 29N/A
• Motor constant Bl/√RE 12.8N/√W
• Air gap height HAG 12mm

Diaphragm

• Effective diameter 400mm
• Effective area SD 1255cm²
• Moving mass MMS 230g
• Moving mass (without air load) MMD 200g

Suspensions

• Stiffness KMS 9.71N/mm
• Compliance CMS 103µm/N
• Equivalent volume to the compliance VAS 229L
• Mechanical resistance RMS 4.6N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 461mm
• Baffle cutout diameter 415mm
• Overall depth 207mm
• Volume occupied by the driver (estimated) 8.4L
• Net weight 16.9kg