T20 in-ear headphones

• RHA says that its proprietary DualCoil dynamic driver has been engineered to deliver levels of audio resolution, clarity and detail beyond what a conventional earphone driver is capable of. 
• Within each metal-injection-molded steel housing are two independently-powered voice coils positioned around a micro ring magnet in concentric formation.
• The T20s benefit from the same kind of cool steel housing and filter-changing sound signature customization options as the award-winning T10i models and the T10s.
• The audio signal from a source player reaches the driver housing, it's split in two.
•  The upper mids and treble frequencies are directed to a copper-clad aluminum outer coil, while a second, inner coil gets busy with the lower mids and bottom end. 
• The coils work together to manipulate a specially engineered diaphragm that features a second (inner) apex