Pioneer TS-W261S4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.4dB
• Frequency response 20 - 125Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 14.59
• Electrical quality factor QES 0.90
• Total quality factor QTS 0.85

Large signal parameters

• Maximum linear excursion xmax 9.3mm
• Air volume displaced at xmax VD 326cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 2.92mH
• VC Diameter 40mm
• Winding height HVC 28.6mm
• Winding material Copper

Magnet

• Flux density B 0.681T
• Force factor Bl 11.5N/A
• Motor constant Bl/√RE 6.43N/√W
• Air gap height HAG 10mm
• Weight 1.7kg
• Material Ferrite

Diaphragm

• Effective diameter 211mm
• Effective area SD 350cm²
• Moving mass MMS 124g
• Moving mass (without air load) MMD 119g
• Material IMPP

Suspensions

• Stiffness KMS 10.1N/mm
• Compliance CMS 99µm/N
• Equivalent volume to the compliance VAS 18.6L
• Mechanical resistance RMS 2.42N·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 4.75kg