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450 mW at 16O Power Output, Fully Discrete Bass Boost Circuit
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Sale Price $98.10


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The black coloured version of the Fiio A3 - Portable Headphone Amplifier is designed for mobile Hi-Fi listening applications and is compatible with a wide range of headphones, earphones, and other in-ear monitoring systems. The all-aluminium 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 mini USB port. For I/O, it features an 1/8" stereo auxiliary input and an 1/8" stereo headphone output.

The device utilises an OPA1642 as the voltage pre-amplifier and an AD8397 power amplifier to deliver a maximum power output of 450 mW at 16O (270 mW at 32 O) 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 150O.

For controls, the amplifier 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.

Specifications

Input1/8" (3.5 mm) stereo aux
GainGAIN=L: Sensitivity = 2.4 V
GAIN=H: Sensitivity = 0.8 V
Output1/8" (3.5 mm) stereo headphone
Volume ControlALPS potentiometer
Frequency Response20 to 20,000 Hz
Crosstalk= 72 dB (Gain=H)
Signal to Noise Ratio> 108 dB
THD0.004% at 1,000 Hz
Channel Imbalance<0.5 dB
Balance ControlGAIN=L: Balance = 0.3 dB
GAIN=H: Balance = 0.2 dB
Charging Time4 hours
Power SupplyMini USB Port
Battery Capacity1400 mAhH
Operating TimeUp to 16 hours
Power Input5 VDC at 500 mA
Input Impedance16 to 150 O
Output Impedance<0.2 O
Output Power270 mW (32 O)
450 mW (16 O)
Output Current Limit92.6 mA
Output Voltage8.67 Vp-p
Dimensions3.59 x 2.20 x 0.51" (91.2 x 56.0 x 13.0 mm)
Weight3.2 oz (92 g)
Product:
FiiO A3 - Portable Headphone Amplifier (Black)
Manufacturer:
FiiO
Model:
A3B
SKU:
A3B
RM Product #:
36823
Battery:
Lithium-Ion Included