Goldwood GW-204/4S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.6dB
• Frequency response 70 - 1300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 140Hz
• Mechanical quality factor QMS 7.19
• Electrical quality factor QES 2.20
• Total quality factor QTS 1.69

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 8cm³
• Power handling P 40W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 0.1mH
• VC Diameter 25.4mm
• Winding material Aluminum

Magnet

• Force factor Bl 2.84N/A
• Motor constant Bl/√RE 1.47N/√W
• Weight 0.283kg

Diaphragm

• Effective diameter 83mm
• Effective area SD 53.5cm²
• Moving mass MMS 5.2g
• Moving mass (without air load) MMD 4.9g
• Material Poly

Suspensions

• Stiffness KMS 4.17N/mm
• Compliance CMS 240µm/N
• Equivalent volume to the compliance VAS 1L
• Mechanical resistance RMS 0.63N·s/m
• Surround material Rolled Foam

Dimensions

• Nominal diameter 4″
• 127mm
• Overall diameter 127mm
• Baffle cutout diameter 102mm
• Mounting depth 54mm
• Volume occupied by the driver (estimated) 0.38L
• Net weight 0.964kg
• Frame material Stamped Steel