Scan-Speak Illuminator 12MU/8731T00

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89dB
• Frequency response 100 - 10000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 66Hz
• Mechanical quality factor QMS 3.63
• Electrical quality factor QES 0.31
• Total quality factor QTS 0.29

Large signal parameters

• Maximum linear excursion xmax 3.4mm
• Maximum excursion before damage xlim 11mm
• Air volume displaced at xmax VD 20cm³
• Power handling P 80W
• Program power Pmax 150W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz, estimated) LE 0.37mH
• VC Diameter 32mm
• Winding height HVC 6.2mm

Magnet

• Force factor Bl 6.1N/A
• Motor constant Bl/√RE 2.51N/√W
• Air gap height HAG 13mm
• Material Neodymium

Diaphragm

• Effective diameter 86mm
• Effective area SD 58cm²
• Moving mass MMS 4.7g
• Moving mass (without air load) MMD 4.4g

Suspensions

• Stiffness KMS 0.806N/mm
• Compliance CMS 1240µm/N
• Equivalent volume to the compliance VAS 5.8L
• Mechanical resistance RMS 0.54N·s/m

Dimensions

• Nominal diameter 4.5″
• 120mm
• Volume occupied by the driver 0.14L
• Net weight 0.8kg