Another key attribute of the ElectroMotion ESL X is its naturally dipolar radiation pattern.
A true dipole, The EM-ESL X radiates sound with equal intensity from the front and back of its diaphragm, but the outputs are in opposite phase. As a result, sound waves rippling out toward the sides meet at the speaker’s edge and cancel. That and the relatively large size of the ElectroMotion ESL X‘s electrostatic panel cause output at the sides to be very low relative to that of a conventional loudspeaker, which in turn minimizes side-wall reflections that tend to muddle sonic detail and stereo imaging. While the reduction in output to the sides contributes to the astonishing clarity for which electrostats are revered, the energy reflected off the wall behind the speaker opens up and deepens the sound.

Premium Connections, Solid Adjustable Footing
Custom 5-way bi-wire binding posts allow for secure wire connections. The EM-ESL X is supplied with sturdy, 3/8-16 ETC™ spikes, which can be used to fine tune vertical wave launch, enhance stability on thick carpets, and create tighter coupling between speaker and floor to provide a tighter and detailed bass performance. Each spike is conveniently covered by removable rubber end caps if you prefer not to use spikes.
ElectroMotion ESL X Specifications
Specifications are subject to change without notice
Frequency Response | 41–22,000 Hz ±3dB |
Horizontal Dispersion | 30° |
Vertical Dispersion | 40″ (101.6cm) line source |
High Frequency Transducer | XStat™ CLS™ electrostaic transducer |
» Panel Dimensions | 40″ x 8.6″ (102 x 22cm) |
» Radiating Area | 344 in² (2,244 cm² ) |
Low Frequency Transducer | Two 8” (20.3 cm) high excursion, high-rigidity paper cones with extended throw driver assembly, non-resonance asymmetrical chamber format, bass reflex |
Sensitivity | 91 dB/2.83 volts/meter |
Impedance | 6 Ohms, 1.6 @ 20kHz Compatible with 4, 6, or 8 Ohm rated amplifiers. |
Recommended Amplifier Power | 20—400 watts per channel |
Crossover Frequency | 400Hz |
Components | Custom-wound audio transformer, air core coils, large steel laminate inductors, polyester capacitors, and low DF electrolytic capacitors |
Inputs | Custom 5-way bi-wire tool-less binding posts |
Weight | 52 lbs. (23.6 kg) |
Dimensions | 59.2″ x 9.4″ x 20.7 ” (150.3cm x 23.8cm x 52.6cm) |