Goldwood GW-4028/S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82.9dB
• Frequency response 70 - 10000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 83.1Hz
• Mechanical quality factor QMS 2.40
• Electrical quality factor QES 1.00
• Total quality factor QTS 0.70

Large signal parameters

• Maximum linear excursion xmax 1.8mm
• Air volume displaced at xmax VD 8.9cm³
• Power handling P 40W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.1Ω
• Inductance (1kHz) LE 0.4mH
• VC Diameter 25.4mm
• Winding material Aluminum

Magnet

• Force factor Bl 4.8N/A
• Motor constant Bl/√RE 1.8N/√W
• Weight 0.454kg

Diaphragm

• Effective diameter 79mm
• Effective area SD 49.5cm²
• Moving mass MMS 6g
• Moving mass (without air load) MMD 5.7g
• Material Poly-Mica

Suspensions

• Stiffness KMS 1.65N/mm
• Compliance CMS 606µm/N
• Equivalent volume to the compliance VAS 2.1L
• Mechanical resistance RMS 1.31N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 4″
• 111mm
• Overall diameter 111mm
• Baffle cutout diameter 102mm
• Mounting depth 70mm
• Volume occupied by the driver (estimated) 0.5L
• Net weight 1.247kg
• Frame material Stamped Steel