B&C Speaker 8PE21

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.8dB
• Frequency response 90 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 87Hz
• Mechanical quality factor QMS 3.80
• Electrical quality factor QES 0.20
• Total quality factor QTS 0.19

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 55cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 51mm
• Winding height HVC 9mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.25T
• Force factor Bl 16.6N/A
• Motor constant Bl/√RE 7.01N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 18g
• Moving mass (without air load) MMD 15.5g

Suspensions

• Stiffness KMS 5.38N/mm
• Compliance CMS 186µm/N
• Equivalent volume to the compliance VAS 13L
• Mechanical resistance RMS 2.59N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 225mm
• Baffle cutout diameter 187mm
• Overall depth 91mm
• Flange thickness 11mm
• Mounting depth 80mm
• Volume occupied by the driver 1.2L
• Net weight 4.25kg