Fiio FH5 quad driver, hybrid earphones with detachable silver plated cable uses 4 drivers per side. FH5 uses a dynamic bass driver firing into a bass port, that tunes the bass and filters out high frequencies. Mid and treble are handled by 3 Knowles balanced armature drivers: 1 mid + 2 treble.
The housing is an aluminum-magnesium shell, screwed together to suppress unwanted resonance and distortion. These sound excellent for the price and the build quality and fit n/ finish are fantastic. These have a high end clarity and even balance with a full deep bass response. Add the optional Fiio RC-BT cable to convert these to a bluetooth earphone.