Views 67,434 FiiO made an updated version of their well-received FiiO F9 IEMs, this time using High-Quality Knowles BA drivers, giving the entire sound a new definition. The Bass driver is the same, but with better BA drivers taking care of the midrange and of the treble, F9Pro is surely …
FiiO F9 Pro – Harder, Better, Faster, FiiO
