British audio company RHA has announced a wireless version of its popular T20 earphones. The T20 Wireless claim to combine the best of wired and wireless design in one package. At the core of the T20 Wireless is RHA's DualCoil driver design. It features two voice coils instead of the usual one, one in the center and one around the magnet with custom diaphragm, which RHA claims puts equal emphasis across all frequency bands. You also get the same custom tuning filters as the standard T20. You can use the bass filter, which boosts the low frequencies, the Treble filter for high...