Beyma 21QLEX1600Fe

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.5dB
• Frequency response 30 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 4.50
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 13mm
• Maximum excursion before damage xlim 60mm
• Air volume displaced at xmax VD 2254cm³
• Power handling P 1600W
• Program power Pmax 3200W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 4mH
• VC Diameter 101.6mm
• Winding height HVC 32mm

Magnet

• Force factor Bl 36.4N/A
• Motor constant Bl/√RE 15.7N/√W
• Air gap height HAG 15mm

Diaphragm

• Effective diameter 470mm
• Effective area SD 1734cm²
• Moving mass MMS 388g
• Moving mass (without air load) MMD 338g

Suspensions

• Stiffness KMS 13.9N/mm
• Compliance CMS 72µm/N
• Equivalent volume to the compliance VAS 309L
• Mechanical resistance RMS 16.2N·s/m

Dimensions

• Nominal diameter 21″
• 540mm
• Overall diameter 545mm
• Baffle cutout diameter 492mm
• Overall depth 266mm
• Volume occupied by the driver (estimated) 11L
• Net weight 17.1kg