Scan-Speak 18W/8535-01

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.4dB
• Frequency response 25 - 3500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 25Hz
• Mechanical quality factor QMS 2.10
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 5mm
• Maximum excursion before damage xlim 10mm
• Air volume displaced at xmax VD 73cm³
• Power handling P 70W
• Program power Pmax 170W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz, estimated) LE 0.86mH
• VC Diameter 38mm
• Winding height HVC 15mm

Magnet

• Force factor Bl 5.9N/A
• Motor constant Bl/√RE 2.44N/√W
• Air gap height HAG 5mm

Diaphragm

• Effective diameter 136mm
• Effective area SD 145cm²
• Moving mass MMS 17.2g
• Moving mass (without air load) MMD 15.9g
• Material Coated Paper/Carbon Fibre

Suspensions

• Stiffness KMS 0.435N/mm
• Compliance CMS 2300µm/N
• Equivalent volume to the compliance VAS 68.9L
• Mechanical resistance RMS 1.33N·s/m
• Surround material SBR Rubber

Dimensions

• Nominal diameter 8″
• 180mm
• Volume occupied by the driver 0.33L
• Net weight 1.1kg
• Frame material Aluminium