Like today’s most advanced exotic supercars, the chassis and body must be extremely solid to extract maximum performance. The FH5’s patented TRISHELL structural design ensures that this is the case, with a 5-axis CNC machined aluminium-magnesium alloy rear shell, body, and front covers fixed tightly together with multiple screws – greatly reducing excess resonance and distortion. The FH5’s low frequency sound tube adopts FiiO’s patented S.TURBO acoustic structural design. With its specially designed turbine-inspired design that makes clever use of the physics of sound waves, you get meaty, deep bass that is more than capable of letting you feel the music. S.TURBO also filters out unnecessary mid and high frequencies produced by the bass driver ensuring a more seamless transition between the lows and highs.