Featuring a full-sized 34-inch tall curvilinear XStat electrostatic transducer the ESL performs more like a mini-flagship than an entry level audiophile speaker. The ESL, however, boasts 40 percent more radiating surface, a superbly integrated and authoritative bass performance, and a sensitivity rated at 91 dB. In addition, the ESL is capable of being effortlessly powered by both receivers and high-end amplifiers alike. ElectroMotion ESL's XStat electrostatic MicroPerf panel is housed within a radical aluminum and composite AirFrame similar to those found on MartinLogan's flagship products. AirFrame technology rigidifies the electrostatic panel without obstructing playable surface area or interfering with ambience enriching dipole sound radiation. At the same time, an AirFrame provides electrical and acoustical isolation, minimizing intermodulated distortion caused by vibration and resonance while enhancing imaging, low-level sonic detail, accuracy, and efficiency. MicroPerf design optimizes the individual holes of the EM-ESL's electrostatic panel. MicroPerf design substantially increases diaphragm radiating area, compared to early generations - without compromising structural integrity. The resulting increase in output capability and efficiency allows the EM-ESL's panel to enjoy a substantial leap in bandwidth and dynamics without growing larger