The very design of planar magnetic drivers, which use a thin membrane excited by a magnetic coil to produce sound, is part of why they're generally so big. (digitaltrends.com)
Modern designs such as Audeze's LCD - 3 (110 Ohms) and LCD - 4 (200 Ohms), which use planar magnetic drivers instead of more traditional dynamic drivers, also require the power of a dedicated amp for optimal performance. (digitaltrends.com)
The Ella set uses planar magnetic drivers in an attempt deliver a clearer and more transparent sound than you might be used to on traditional headphones. (thenextweb.com)