Pioneer TS-W261D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.2dB
• Frequency response 20 - 125Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 46Hz
• Mechanical quality factor QMS 15.49
• Electrical quality factor QES 1.12
• Total quality factor QTS 1.04

Large signal parameters

• Maximum linear excursion xmax 10.1mm
• Air volume displaced at xmax VD 354cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.6Ω
• Inductance (1kHz, in series) LE 4.91mH
• VC Diameter 40mm
• Winding height HVC 30.2mm
• Winding material Copper

Magnet

• Flux density B 0.718T
• Force factor (in series) Bl 15.3N/A
• Motor constant Bl/√RE 5.96N/√W
• Air gap height HAG 10mm
• Weight 1.7kg
• Material Ferrite

Diaphragm

• Effective diameter 211mm
• Effective area SD 350cm²
• Moving mass MMS 123g
• Moving mass (without air load) MMD 118g
• Material IMPP

Suspensions

• Stiffness KMS 10.5N/mm
• Compliance CMS 95µm/N
• Equivalent volume to the compliance VAS 17.7L
• Mechanical resistance RMS 2.33N·s/m
• Surround material Fiber Reinforced Elastic Polymer

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 277mm
• Baffle cutout diameter 235mm
• Overall depth 155mm
• Flange thickness 16mm
• Mounting depth 139mm
• Volume occupied by the driver 1.22L
• Net weight 4.8kg