Scan-Speak Discovery 18W/8434G00

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.9dB
• Frequency response 50 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 7.58
• Electrical quality factor QES 0.46
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 4.2mm
• Maximum excursion before damage xlim 8mm
• Air volume displaced at xmax VD 58cm³
• Power handling P 55W
• Program power Pmax 170W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.6Ω
• Inductance (1kHz, estimated) LE 0.71mH
• VC Diameter 32mm
• Winding height HVC 13.4mm

Magnet

• Force factor Bl 7.2N/A
• Motor constant Bl/√RE 3.04N/√W
• Air gap height HAG 5mm

Diaphragm

• Effective diameter 132mm
• Effective area SD 137cm²
• Moving mass MMS 13.7g
• Moving mass (without air load) MMD 12.4g
• Material Coated Fibre Glass

Suspensions

• Stiffness KMS 1.35N/mm
• Compliance CMS 740µm/N
• Equivalent volume to the compliance VAS 19.5L
• Mechanical resistance RMS 0.57N·s/m
• Surround material SBR Rubber

Dimensions

• Nominal diameter 8″
• 180mm
• Volume occupied by the driver 0.3L
• Net weight 1.3kg
• Frame material Die cast Aluminium