Goldwood GW-408D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB
• Frequency response 44 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 51.2Hz
• Mechanical quality factor QMS 4.46
• Electrical quality factor QES 0.75
• Total quality factor QTS 0.64

Large signal parameters

• Maximum linear excursion xmax 2.5mm
• Air volume displaced at xmax VD 52cm³
• Power handling P 100W
• Program power Pmax 220W

Voice Coil

• Nominal impedance Z 2 x 8Ω
• DC resistance (in series) RE 14.8Ω
• Inductance (1kHz, in series) LE 2mH
• VC Diameter 25.4mm
• Winding material Aluminum

Magnet

• Force factor (in series) Bl 13.3N/A
• Motor constant Bl/√RE 3.45N/√W
• Weight 0.567kg

Diaphragm

• Effective diameter 162mm
• Effective area SD 206cm²
• Moving mass MMS 27.7g
• Moving mass (without air load) MMD 25.5g
• Material Poly

Suspensions

• Stiffness KMS 2.86N/mm
• Compliance CMS 350µm/N
• Equivalent volume to the compliance VAS 20.8L
• Mechanical resistance RMS 2N·s/m
• Surround material Rolled Foam

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 203mm
• Baffle cutout diameter 181mm
• Mounting depth 92mm
• Volume occupied by the driver (estimated) 0.67L
• Net weight 1.644kg
• Frame material Stamped Steel