Scan-Speak Revelator 18M/4631T00

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.3dB
• Frequency response 70 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 65Hz
• Mechanical quality factor QMS 5.65
• Electrical quality factor QES 0.67
• Total quality factor QTS 0.60

Large signal parameters

• Maximum linear excursion xmax 3mm
• Maximum excursion before damage xlim 14.5mm
• Air volume displaced at xmax VD 46cm³
• Power handling P 120W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz, estimated) LE 0.46mH
• VC Diameter 38mm
• Winding height HVC 11mm
• Former material Titanium

Magnet

• Force factor Bl 5.6N/A
• Motor constant Bl/√RE 2.99N/√W
• Air gap height HAG 5mm

Diaphragm

• Effective diameter 138mm
• Effective area SD 154cm²
• Moving mass MMS 14.3g
• Moving mass (without air load) MMD 12.9g
• Material Sliced

Suspensions

• Stiffness KMS 2.38N/mm
• Compliance CMS 420µm/N
• Equivalent volume to the compliance VAS 14L
• Mechanical resistance RMS 1.03N·s/m
• Surround material Coated Foam

Dimensions

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