B&C Speaker 18IPAL

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.6dB
• Frequency response 32 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 0.14
• Total quality factor QTS 0.14

Large signal parameters

• Maximum linear excursion xmax 20mm
• Air volume displaced at xmax VD 2420cm³
• Power handling P 1700W
• Program power Pmax 3400W

Voice Coil

• Nominal impedance Z 2Ω
• DC resistance RE 1.3Ω
• Inductance (1kHz) LE 0.65mH
• VC Diameter 116mm
• Winding height HVC 44mm
• Winding material Aluminium
• Former material Glass Fibre

Magnet

• Flux density B 1.5T
• Force factor Bl 24.5N/A
• Motor constant Bl/√RE 21.5N/√W
• Air gap height HAG 12mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 393mm
• Effective area SD 1210cm²
• Moving mass MMS 330g
• Moving mass (without air load) MMD 301g
• Material Waterproof Both Sides

Suspensions

• Stiffness KMS 13N/mm
• Compliance CMS 77µm/N
• Equivalent volume to the compliance VAS 164L
• Mechanical resistance RMS 15.8N·s/m
• Spider material Silicone

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 460mm
• Baffle cutout diameter 422mm
• Overall depth 261mm
• Flange thickness 16mm
• Mounting depth 245mm
• Volume occupied by the driver 10.5L
• Net weight 15.35kg