Beyma 21PW1400Fe

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.9dB
• Frequency response 25 - 1800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 7.40
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 10mm
• Maximum excursion before damage xlim 27.5mm
• Air volume displaced at xmax VD 1734cm³
• Power handling P 1400W
• Program power Pmax 2800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.3mH
• VC Diameter 100mm
• Winding height HVC 25mm

Magnet

• Force factor Bl 28.2N/A
• Motor constant Bl/√RE 12.4N/√W
• Air gap height HAG 12mm
• Material Ferrite

Diaphragm

• Effective diameter 470mm
• Effective area SD 1734cm²
• Moving mass MMS 298g
• Moving mass (without air load) MMD 249g

Suspensions

• Stiffness KMS 10.6N/mm
• Compliance CMS 94µm/N
• Equivalent volume to the compliance VAS 402L
• Mechanical resistance RMS 7.51N·s/m

Dimensions

• Nominal diameter 21″
• 540mm
• Overall depth 79mm
• Volume occupied by the driver (estimated) 0.54L
• Net weight 19.9kg