Goldwood GW-215/4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.9dB
• Frequency response 22 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 29.6Hz
• Mechanical quality factor QMS 7.89
• Electrical quality factor QES 2.44
• Total quality factor QTS 1.86

Large signal parameters

• Maximum linear excursion xmax 3.5mm
• Air volume displaced at xmax VD 288cm³
• Power handling P 135W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.6Ω
• Inductance (1kHz) LE 0.4mH
• VC Diameter 38.1mm
• Winding material Aluminum

Magnet

• Force factor Bl 5.08N/A
• Motor constant Bl/√RE 2.67N/√W
• Weight 0.567kg

Diaphragm

• Effective diameter 324mm
• Effective area SD 823cm²
• Moving mass MMS 94.4g
• Moving mass (without air load) MMD 77.9g
• Material Poly

Suspensions

• Stiffness KMS 3.27N/mm
• Compliance CMS 306µm/N
• Equivalent volume to the compliance VAS 292L
• Mechanical resistance RMS 2.23N·s/m
• Surround material Rolled Foam

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 381mm
• Baffle cutout diameter 356mm
• Mounting depth 130mm
• Volume occupied by the driver (estimated) 0.96L
• Net weight 2.325kg
• Frame material Stamped Steel