Beyma 18PWB1000Fe/S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.2dB
• Frequency response 30 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 27Hz
• Mechanical quality factor QMS 8.20
• Electrical quality factor QES 0.40
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 12.5mm
• Maximum excursion before damage xlim 52mm
• Air volume displaced at xmax VD 1569cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.0Ω
• Inductance (1kHz) LE 2mH
• VC Diameter 101.6mm
• Winding height HVC 30mm

Magnet

• Force factor Bl 25N/A
• Motor constant Bl/√RE 10.2N/√W
• Air gap height HAG 12mm

Diaphragm

• Effective diameter 400mm
• Effective area SD 1255cm²
• Moving mass MMS 245g
• Moving mass (without air load) MMD 215g

Suspensions

• Stiffness KMS 7.04N/mm
• Compliance CMS 142µm/N
• Equivalent volume to the compliance VAS 317L
• Mechanical resistance RMS 5.1N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 461mm
• Baffle cutout diameter 415mm
• Overall depth 212mm
• Volume occupied by the driver (estimated) 7.4L
• Net weight 13.5kg