The FiiO A3 Portable Headphone Amplifier improves audio quality and volume from your sound source. It represents great value with new features and build quality.
The FiiO A3 Portable Headphone Amplifier is designed for Hi-Fi listening applications and is compatible with a wide range of headphones and earphones. The all aluminum alloy body and chassis of the amplifier shields against electromagnetic interference and the built-in rechargeable 1400 mAH battery provides approximately 16 hours of operation on a four hour charge via the mini USB port. For inputs and outputs it features a 3.5mm stereo auxiliary input socket and a 3.5mm stereo headphone output socket.
The FiiO A3 uses an OPA1642 chip as the voltage pre-amplifier and an AD8397 power amplifier chip to deliver the maximum power output of 450mW into 16Ω (270 mW into 32 Ω) with a frequency response of 20 to 20,000 Hz, a signal-to-noise ratio of equal to or greater than 108 dB, and a T.H.D. of less than 0.004% into loads between 16 and 150Ω.
The FiiO A3 controls includes a low-high gain toggle switch, a rotary volume control and a fully discrete bass boost circuit that can be bypassed to decrease interference and lower the overall noise floor.