Upgrade to Ultimate Audio Performance with the Crystal DMAS audio upgrade. Installs in minutes and includes everything you need. These provide the power of 40mm off the ear high fidelity drivers. 
Includes Left and Right drivers with a quick installation kit. 

This advanced speaker set utilizes the latest BMR 40MM driver technology and hovers over your ear without touching. If you have a Pimax headset this is the best audio option available and produces well balanced audio across the sound spectrum.