Goldwood GW-S525/4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.2dB
• Frequency response 40 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 72.9Hz
• Mechanical quality factor QMS 3.79
• Electrical quality factor QES 1.15
• Total quality factor QTS 0.88

Large signal parameters

• Maximum linear excursion xmax 2mm
• Air volume displaced at xmax VD 17cm³
• Power handling P 70W
• Program power Pmax 130W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.3mH
• VC Diameter 25.4mm
• Winding material Aluminum

Magnet

• Force factor Bl 3.9N/A
• Motor constant Bl/√RE 2.05N/√W
• Weight 0.425kg

Diaphragm

• Effective diameter 102mm
• Effective area SD 82.3cm²
• Moving mass MMS 10.5g
• Moving mass (without air load) MMD 9.9g
• Material Poly

Suspensions

• Stiffness KMS 2.22N/mm
• Compliance CMS 451µm/N
• Equivalent volume to the compliance VAS 4.3L
• Mechanical resistance RMS 1.27N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 5.25″
• 145mm
• Overall diameter 145mm
• Baffle cutout diameter 113mm
• Mounting depth 57mm
• Volume occupied by the driver (estimated) 0.4L
• Net weight 1.021kg
• Frame material Stamped Steel