Scan-Speak 18W/8545-01

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.1dB
• Frequency response 25 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 25Hz
• Mechanical quality factor QMS 1.55
• Electrical quality factor QES 0.22
• Total quality factor QTS 0.20

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Maximum excursion before damage xlim 10mm
• Air volume displaced at xmax VD 94cm³
• Power handling P 100W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz, estimated) LE 0.86mH
• VC Diameter 42mm
• Winding height HVC 19mm
• Former material Aluminium

Magnet

• Force factor Bl 8.4N/A
• Motor constant Bl/√RE 3.52N/√W
• Air gap height HAG 6mm

Diaphragm

• Effective diameter 136mm
• Effective area SD 145cm²
• Moving mass MMS 18g
• Moving mass (without air load) MMD 16.7g
• Material Coated Paper/Carbon Fibre

Suspensions

• Stiffness KMS 0.435N/mm
• Compliance CMS 2300µm/N
• Equivalent volume to the compliance VAS 68.6L
• Mechanical resistance RMS 1.8N·s/m
• Surround material SBR Rubber

Dimensions

• Nominal diameter 8″
• 180mm
• Volume occupied by the driver 0.54L
• Net weight 2.3kg
• Frame material Aluminium