Pioneer TS-W311D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.1dB
• Frequency response 20 - 125Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43Hz
• Mechanical quality factor QMS 13.79
• Electrical quality factor QES 1.02
• Total quality factor QTS 1.05

Large signal parameters

• Maximum linear excursion xmax 10.8mm
• Air volume displaced at xmax VD 562cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 5.8Ω
• Inductance (1kHz, in series) LE 4.85mH
• VC Diameter 48mm
• Winding height HVC 31.6mm
• Winding material Copper

Magnet

• Flux density B 0.738T
• Force factor (in series) Bl 16.2N/A
• Motor constant Bl/√RE 6.73N/√W
• Air gap height HAG 10mm
• Weight 2.1kg
• Material Ferrite

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 166g
• Moving mass (without air load) MMD 157g
• Material IMPP

Suspensions

• Stiffness KMS 13.2N/mm
• Compliance CMS 76µm/N
• Equivalent volume to the compliance VAS 32.7L
• Mechanical resistance RMS 3.39N·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 6.2kg