Pioneer TS-W304R

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.5dB
• Frequency response 20 - 220Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 28.6Hz
• Mechanical quality factor QMS 13.30
• Electrical quality factor QES 0.74
• Total quality factor QTS 0.70

Large signal parameters

• Maximum linear excursion xmax 4.7mm
• Air volume displaced at xmax VD 244cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.0Ω
• Inductance (1kHz) LE 2.39mH
• VC Diameter 40mm
• Winding height HVC 15.5mm

Magnet

• Flux density B 0.621T
• Force factor Bl 10.4N/A
• Motor constant Bl/√RE 6N/√W
• Air gap height HAG 6mm
• Weight 0.94kg

Diaphragm

• Effective diameter 257mm
• Effective area SD 520cm²
• Moving mass MMS 150g
• Moving mass (without air load) MMD 141g
• Material IMPP

Suspensions

• Stiffness KMS 4.76N/mm
• Compliance CMS 210µm/N
• Equivalent volume to the compliance VAS 77.9L
• Mechanical resistance RMS 2.01N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Baffle cutout diameter 283mm
• Mounting depth 135mm
• Volume occupied by the driver 1.66L