B&C Speaker 8PS21

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.4dB
• Frequency response 70 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 73Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 110cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 0.5mH
• VC Diameter 51mm
• Winding height HVC 16mm
• Winding material Copper
• Former material Kapton

Magnet

• Flux density B 1.1T
• Force factor Bl 12.6N/A
• Motor constant Bl/√RE 5.42N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 220cm²
• Moving mass MMS 23g
• Moving mass (without air load) MMD 20.5g

Suspensions

• Stiffness KMS 4.85N/mm
• Compliance CMS 206µm/N
• Equivalent volume to the compliance VAS 14L
• Mechanical resistance RMS 2.51N·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 3.3kg