Goldwood GW-12PC/4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.4dB
• Frequency response 20 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32.9Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.39

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 244cm³
• Power handling P 225W
• Program power Pmax 450W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 1.7mH
• VC Diameter 50.8mm
• Winding material Aluminum

Magnet

• Force factor Bl 13.6N/A
• Motor constant Bl/√RE 7.07N/√W
• Weight 1.417kg

Diaphragm

• Effective diameter 249mm
• Effective area SD 488cm²
• Moving mass MMS 107g
• Moving mass (without air load) MMD 98.7g
• Material Poly-Mica

Suspensions

• Stiffness KMS 4.57N/mm
• Compliance CMS 219µm/N
• Equivalent volume to the compliance VAS 73.2L
• Mechanical resistance RMS 5.65N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 12″
• 311mm
• Overall diameter 311mm
• Baffle cutout diameter 283mm
• Mounting depth 137mm
• Volume occupied by the driver (estimated) 1L
• Net weight 2.438kg
• Frame material Die Cast Aluminum