Scan-Speak Revelator 18W/4531G01

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.2dB
• Frequency response 34 - 7000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 34Hz
• Mechanical quality factor QMS 4.90
• Electrical quality factor QES 0.38
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Maximum excursion before damage xlim 11mm
• Air volume displaced at xmax VD 102cm³
• Power handling P 70W
• Program power Pmax 110W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz, estimated) LE 0.51mH
• VC Diameter 38mm
• Winding height HVC 18mm

Magnet

• Force factor Bl 5.7N/A
• Motor constant Bl/√RE 3.05N/√W
• Air gap height HAG 5mm
• Material Ferrite

Diaphragm

• Effective diameter 142mm
• Effective area SD 157cm²
• Moving mass MMS 16.9g
• Moving mass (without air load) MMD 15.4g
• Material Wood Fibre

Suspensions

• Stiffness KMS 0.769N/mm
• Compliance CMS 1300µm/N
• Equivalent volume to the compliance VAS 45.6L
• Mechanical resistance RMS 0.74N·s/m
• Surround material SBR Rubber

Dimensions

• Nominal diameter 8″
• 180mm
• Volume occupied by the driver 0.47L
• Net weight 1.7kg