Wire EDM Machines are driven by linear motor.

Wire-EDM part

Image by NVT Technology Pte Ltd

Wire EDM Machines are driven by linear motor.
Schaumburg, IL — With the high demands of today's market for the latest innovative technology, Sodick, Inc. is continuously working on R&D for new machines that are faster, more accurate and achieve a greater surface finish. The most recent line of …
Read more on ThomasNet News (press release)

SOL REPUBLIC Tracks Air, Bluetooth headphones for the EDM lover
The cable is a “Y design” with one wire going into your 3.5mm headphone jack and two wires – one going into each sound engine. The overall design is the headphones are quite nice and the unit can be purchased in four colors – blue, red, white, and black.
Read more on Daniel Rubino