Scan Speak 21 WE/4542 T00 Ellipticor Midwoofer

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Scan Speak 21 WE/4542 T00 Ellipticor Midwoofer

With the Ellipticor family a long tradition of circular motor structures and their inherent breakup behavior has been broken since one of its key features is an elliptical voice coil and magnet gap. In combination with the powerful SD AirCirc magnet system the Ellipticor transducers has high sensitivity, very low distortion, and has an extremely fast response to transients. Above all a TRUE TO LIVE sound which makes Ellipticors among the very best loudspeaker transducers on the market!

  • 21 cm Midwoofer
  • 4 ohm, Paper Cone, Neo, AirCirc
  • Elliptic voice coil
  • Very low mechanical losses
  • High sensitivity (SPL)
  • Aircirc optimized magnetsystem
  • Unusually low distortion
  • Flexible appearence with replaceable decor ring

Short data

Usage as Midrange
Power Handling 100 Watt
Impedance 4 Ohm
Frequency from 800 Hz
Max. Frequency 7 kHz


Overall dimensions 222 mm
Baffle cutout 201 mm
Depth (Total) 107.7 mm
Front material Alu mounting ring
Frame Material Aluminium diecast
Membrane Type Cone
Membrane Surround Rubber
Membrane Material Paper
Voice coil Ø 35/45 mm
Voice coil height 19.5 mm
Magnet Ø 104 mm
Magnet-height 40 mm


Resonance fs fs: 38 Hz
Mechanical Q Qms: 5.43
Electrical Q Qes: 0.3
Total Q Qts: 0.28
Equivalent Air-Volumen Vas: 54 Liter
DC-Resistance Re: 3.4 Ohm
Coil Inductance Le: 0.1 mH
Mech. Compliance Cms: 0.7 mm/N
Moving Mass Mms: 25 g
mech. Resistance Rms: 1.1 kg/s-¹
Max. Excursion +/- Xmax: 12 mm
BL Product Bl: 8.2 N/A
Membrane Ø Md: 172
Membrane Area Sd: 233 cm²
Sound pressure dB: 93.5 SPL


Technical Details

PDF-Product information

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