Eighteen Sound 10W650

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.4dB
• Frequency response 55 - 5700Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 67Hz
• Mechanical quality factor QMS 9.60
• Electrical quality factor QES 0.51
• Total quality factor QTS 0.48

Large signal parameters

• Maximum linear excursion xmax 5.7mm
• Air volume displaced at xmax VD 200cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.1Ω
• Inductance (1kHz) LE 0.59mH
• VC Diameter 65mm
• Winding material Aluminum

Magnet

• Force factor Bl 12.4N/A
• Motor constant Bl/√RE 5.49N/√W
• Material Ferrite

Diaphragm

• Effective diameter 211mm
• Effective area SD 350cm²
• Moving mass MMS 36.6g
• Moving mass (without air load) MMD 31.9g

Suspensions

• Stiffness KMS 6.49N/mm
• Compliance CMS 154µm/N
• Equivalent volume to the compliance VAS 26L
• Mechanical resistance RMS 1.6N·s/m

Dimensions

• Nominal diameter 10″
• 260mm
• Overall diameter 260mm
• Baffle cutout diameter 230mm
• Overall depth 121mm
• Flange thickness 9mm
• Mounting depth 112mm
• Volume occupied by the driver (estimated) 1.7L
• Net weight 4.3kg