accuton C158-6-851

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 31Hz
• Mechanical quality factor QMS 5.09
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 57cm³
• Power handling P 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.77mH
• VC Diameter 38mm
• Winding material Copper
• Former material Titanium

Magnet

• Force factor Bl 8.7N/A
• Motor constant Bl/√RE 3.53N/√W
• Diameter 120mm
• Height 42mm

Diaphragm

• Effective diameter 120mm
• Effective area SD 113cm²
• Moving mass MMS 18.5g
• Moving mass (without air load) MMD 17.6g
• Material Ceramic

Suspensions

• Stiffness KMS 0.704N/mm
• Compliance CMS 1420µm/N
• Equivalent volume to the compliance VAS 25.7L
• Mechanical resistance RMS 0.71N·s/m

Dimensions

• Nominal diameter 6.25″
• 158mm
• Overall diameter 158mm
• Baffle cutout diameter 137mm
• Overall depth 90mm
• Flange thickness 6mm
• Mounting depth 84mm
• Volume occupied by the driver (estimated) 0.52L