Equipped with a larger XStat electrostatic transducer than the EM-ESL the EM-ESL X has a radiating area over 50in2 larger. Twin 8-inch high-excursion woofers are housed in a surprisingly small non-resonant asymmetrical bass reflex ported chamber. Dual audiophile gradedoped-fiber cone woofers custom designed by MartinLogans in-house design and engineering team optimize cone suspension and the magnetic flux field to produce big bass output with vanishingly low distortion. The specially developed ElectroMotion XStat MicroPerf electrostatic panel is housed using AirFrame Technology. AirFrame technology a composite of aluminum and composite materials keeps the electrostatic panel rigid without obstructing playable surface area or interfering with ambience-enriching dipole sound radiation.