The Fiio A3 features a 1,400mAh battery, rated for 16 hours, a Low and High gain setting and a nice Bass Boost function. It has a very low output impedance of <0.2 ohms and Fiio recommends pairing the Amp with headphones with impedance ranging from 16-150 ohms. I know… these are all just numbers and specs where you can read online. But I’ll explain more on these features throughout the course of the review.
• Power output: 450 mW @ 16 ohms, 270 mW @ 32 ohms • Frequency response: 20-20,000 Hz • Signal to noise ratio: ≥108 dB • THD: <0.004% • Impedance: 16-150 ohms • Power supply: Mini USB port • Charging time: 240 minutes • Operation time: 16 hours • Dimensions: 2.2″ W x 3.6″ D x 0.5″ H. Weight0.5300 lbs.