Pioneer TS-W311S4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB
• Frequency response 20 - 125Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 42Hz
• Mechanical quality factor QMS 14.96
• Electrical quality factor QES 0.84
• Total quality factor QTS 0.79

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 416cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz) LE 2.87mH
• VC Diameter 48mm
• Winding height HVC 26mm
• Winding material Copper

Magnet

• Flux density B 0.693T
• Force factor Bl 13N/A
• Motor constant Bl/√RE 7.51N/√W
• Air gap height HAG 10mm
• Weight 2.1kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 164g
• Moving mass (without air load) MMD 155g
• Material IMPP

Suspensions

• Stiffness KMS 11.5N/mm
• Compliance CMS 87µm/N
• Equivalent volume to the compliance VAS 37.5L
• Mechanical resistance RMS 2.88N·s/m
• Surround material Fiber Reinforced Elastic Polymer

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 327mm
• Baffle cutout diameter 283mm
• Overall depth 169mm
• Flange thickness 18mm
• Mounting depth 151mm
• Volume occupied by the driver 1.67L
• Net weight 6.1kg