Pioneer TS-SW2502S4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.2dB
• Frequency response 20 - 125Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 42Hz
• Mechanical quality factor QMS 12.04
• Electrical quality factor QES 1.06
• Total quality factor QTS 0.97

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 259cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz) LE 1.91mH
• VC Diameter 48mm
• Winding height HVC 23mm
• Winding material Copper

Magnet

• Flux density B 0.56T
• Force factor Bl 12N/A
• Motor constant Bl/√RE 6.93N/√W
• Air gap height HAG 10mm
• Weight 1.03kg
• Material Strontium Ferrite

Diaphragm

• Effective diameter 225mm
• Effective area SD 399cm²
• Moving mass MMS 171g
• Moving mass (without air load) MMD 165g
• Material Mica reinforced IMPP

Suspensions

• Stiffness KMS 12.2N/mm
• Compliance CMS 82µm/N
• Equivalent volume to the compliance VAS 18.5L
• Mechanical resistance RMS 3.79N·s/m

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 278mm
• Baffle cutout diameter 249mm
• Overall depth 93mm
• Flange thickness 15mm
• Mounting depth 78mm
• Volume occupied by the driver 0.68L
• Net weight 3.55kg