Scan-Speak Revelator 28W/8878T01

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
• Frequency response 22 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 22Hz
• Mechanical quality factor QMS 5.81
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.31

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Maximum excursion before damage xlim 28mm
• Air volume displaced at xmax VD 272cm³
• Power handling P 200W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz, estimated) LE 2.67mH
• VC Diameter 75mm
• Winding height HVC 23mm
• Former material Titanium

Magnet

• Force factor Bl 14.9N/A
• Motor constant Bl/√RE 5.94N/√W
• Air gap height HAG 8mm

Diaphragm

• Effective diameter 215mm
• Effective area SD 363cm²
• Moving mass MMS 84g
• Moving mass (without air load) MMD 78.8g
• Material Paper sandwich

Suspensions

• Stiffness KMS 1.61N/mm
• Compliance CMS 620µm/N
• Equivalent volume to the compliance VAS 116L
• Mechanical resistance RMS 2N·s/m

Dimensions

• Nominal diameter 12″
• 280mm
• Volume occupied by the driver 2.23L
• Net weight 7.5kg
• Frame material Die cast Aluminium