Goldwood GW-205/4S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.2dB
• Frequency response 62 - 1200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 83.1Hz
• Mechanical quality factor QMS 3.18
• Electrical quality factor QES 0.87
• Total quality factor QTS 0.68

Large signal parameters

• Maximum linear excursion xmax 1.5mm
• Air volume displaced at xmax VD 15cm³
• Power handling P 70W
• Program power Pmax 130W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 25.4mm
• Winding material Aluminum

Magnet

• Force factor Bl 4.44N/A
• Motor constant Bl/√RE 2.34N/√W
• Weight 0.454kg

Diaphragm

• Effective diameter 111mm
• Effective area SD 96.8cm²
• Moving mass MMS 9.1g
• Moving mass (without air load) MMD 8.4g
• Material Poly

Suspensions

• Stiffness KMS 2.5N/mm
• Compliance CMS 400µm/N
• Equivalent volume to the compliance VAS 5.3L
• Mechanical resistance RMS 1.49N·s/m
• Surround material Rolled Foam

Dimensions

• Nominal diameter 5.25″
• 152mm
• Overall diameter 152mm
• Baffle cutout diameter 127mm
• Mounting depth 76mm
• Volume occupied by the driver (estimated) 0.55L
• Net weight 1.361kg
• Frame material Stamped Steel