Scan-Speak Ellipticor 21WE/4542T00

• Sensitivity (1W, 1m, infinite baffle) SPL1W 91.4dB
• Frequency response 38 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 5.43
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 7.2mm
• Maximum excursion before damage xlim 12mm
• Air volume displaced at xmax VD 168cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz, estimated) LE 0.64mH
• VC Diameter 45mm
• Winding height HVC 19.5mm

Magnet

• Force factor Bl 8.2N/A
• Motor constant Bl/√RE 4.45N/√W
• Air gap height HAG 5mm

Diaphragm

• Effective diameter 172mm
• Effective area SD 233cm²
• Moving mass MMS 25g
• Moving mass (without air load) MMD 22.4g

Suspensions

• Stiffness KMS 1.43N/mm
• Compliance CMS 700µm/N
• Equivalent volume to the compliance VAS 54L
• Mechanical resistance RMS 1.1N·s/m

Dimensions

• Nominal diameter 8″
• 210mm
• Volume occupied by the driver 0.49L
• Net weight 1.8kg