B&C Speaker 12SW115

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.6dB
• Frequency response 40 - 1500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39Hz
• Mechanical quality factor QMS 9.80
• Electrical quality factor QES 0.26
• Total quality factor QTS 0.25

Large signal parameters

• Maximum linear excursion xmax 13.8mm
• Air volume displaced at xmax VD 720cm³
• Power handling P 1700W
• Program power Pmax 3400W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 1.35mH
• VC Diameter 115mm
• Winding height HVC 34.5mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.12T
• Force factor Bl 23.8N/A
• Motor constant Bl/√RE 13.5N/√W
• Air gap height HAG 14mm
• Material Neodymium Inside Slug

Diaphragm

• Effective diameter 258mm
• Effective area SD 522cm²
• Moving mass MMS 192g
• Moving mass (without air load) MMD 183g
• Material Waterproof Front Side

Suspensions

• Stiffness KMS 11.6N/mm
• Compliance CMS 86µm/N
• Equivalent volume to the compliance VAS 33L
• Mechanical resistance RMS 4.8N·s/m
• Spider material Silicone

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 315mm
• Baffle cutout diameter 283mm
• Overall depth 167mm
• Flange thickness 12mm
• Mounting depth 155mm
• Volume occupied by the driver 3.4L
• Net weight 10.4kg