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The FiiO A3 Headphone Amplifier is a compact and lightweight headphone amplifier that offers high-quality audio, ideal for portable music devices. The amplifier has standard 3.5mm input and output connectors for compatibility with a variety of MP3 players, CD players, computers, earbuds, headphones, and other devices. It has a heavy-current 3-channel amplified circuit that lowers output impedance. It also provides high efficiency and a low-noise power boost. It provides precise and even sound pressure levels and a wide dynamic range.
The convenient volume control uses a closed APLS potentiometer to ensure low noise and excellent channel balance. The amplifier offers 3 levels of bass boost and 2 levels of gain to meet your personal preferences and adapt to different sound sources. There are also high and low voltage options to meet different needs. An auto-lock protective circuit will turn the amplifier off automatically in the event of abnormal activity in order to protect your headphones and minimize the risk of hearing damage.
The amplifier operates on a high-performance BL-5B Lithium battery that is easily replaceable. The battery provides approximately 10 hours of operation per charge, allowing you to listen all day. The amplifier has charging and power indicator LEDs to give you a visual cue of operation status. A charge priority function will cease operation while the amplifier is charging. Once the battery has been charged and the amplifier is unplugged, operation resumes.
Aluminum-alloy body and chassis to provide shielding from interference and a beautiful design.
The new A3 is equipped with switches and knobs that are easy to read and operate.
The OPA1642 pre-amplifier serves as the voltage amp while the AD8397 power amp serves as the current amplifier for an elegant balance across all levels.
With a bigger battery, the A3 will ensure for playback for at least 16 hours.
| Model/Number: | A3 |
| Weight: | 92g |
| Dimensions: | 91.2 x 56 x 13 (mm) |
| Battery Capacity: | 1400 mAh |
| Battery Life: | >16 hours |
| Charging Time: | <240 minutes |
| Colour Available: | Black |
| Audio Input: | 3.5 mm stereo jack |
| Volume Control: | ALPS Potentiometer |
| Drive Ability: | 16~150Ω (recommend) |
| Output Power: | 270 mW (32 Ω); 450 mW (16 Ω) |
| THD: | 0.004%@1KHz |
| Frequency response: | 20Hz~20KHz |
| Input Sensitivity: | GAIN=L : Sensitivity =2.4V ; GAIN = H: Sensitivity = 0.8 V |
| Crosstalk: | ≥72dB (Gain = H) |
| Gain: | GAIN = L: GAIN = -3.8dB; GAIN = H: GAIN = 11.7 dB |
| MAX output voltage: | 8.67 Vp-p |
| Headphone Output: | 3.5mm stereo jack |
| Bass Boost: | |
| Power Input: | DC 5V/500mA |
| Output Impedance | <0.2 Ω |
| Signal to Noise Ratio: | >108dB |
| MAX input Level: | 92.6 mA |
| Channel Imbalance: | < 0.5 dB |
| Balance: | GAIN = L : Balance=0.3dB; GAIN = H: Balance =0.2dB |
| MAX Output Current: | Vmax>8V |
Frequency Response diagram of curves
Distortion diagram of curves (GAIN=H)
Distortion diagram of curves(GAIN=L).
| Model/Number | A5 | A3 | A1 |
|---|---|---|---|
| General Specifications | |||
| Color Available | Titanium | Black, Titanium | Titanium |
| Dimensions | 124 mm×65.5 mm×14.5 mm | 91.2 x 56 x 13 (mm) | 42 x 40.7 x 9.4 (mm) |
| Weight | 168 g | 92 g | 20g |
| Power Indicator | Yes | Yes | Yes |
| Audio input | 3.5mm stereo jack | 3.5mm stereo jack | 3.5mm stereo jack |
| Headphone output | 3.5mm stereo jack | 3.5mm stereo jack | 3.5mm stereo jack |
| Headphone Impedance Range | 16~300Ω(recommend) | 16~150Ω(recommend) | 16~150Ω(recommend) |
| Volume Control | ALPS Potentiometer | ALPS Potentiometer | Digital volume control |
| Line Control for device | NO | NO | NO |
| BASS Boost | 1 Level | 1 Level | 2 Level |
| GAIN Control | 2 Level | 2 Level | NO |
| Cross feed | NO | NO | NO |
| Supply Voltage Adjustable | NO | NO | NO |
| Audio Performance | |||
| Output Power | ＞800 mW(32Ω/THD＜1%) ≥150mW（300Ω/THD＜1%） | ＞450 mW (16 Ω/THD+N<1%) | ＞100 mW (16 Ω/THD+N<1%) |
| Frequency Response | 10 Hz~90 kHz | 10 Hz~90 kHz | 20 Hz~20 kHz |
| SNR | ≥115dB | >108dB | >100dB |
| Output impedance | <0.3Ω | <0.2Ω | <0.2Ω |
| Crosstalk | >75dB@ 1KHz | >72dB@ GAIN=H | ≥65dB@ 1KHz |
| THD+N | ＜0.002％ (1 kHz) | ＜0.004％ (1 kHz) | ＜0.05％ (1 kHz |
| MAX BASS Boost | >5dB@ BASS = ON | ＞5 dB (BASS ON | Bass1: 2.7dB bass boost Bass2: 5.2dB bass boost Bass3: 5.2dB bass reduction |
| MAX Gain | ≥13 dB | >11 dB | 3.65 dB |
| Peak Output Voltage | 14.96 Vp-p | > 8.67VP-P | 4.52 Vp-p |
| MAX output Current | 250 mA | > 92.6mA | 50 mA |
| Input Overload | 250 mA | / | 1.35Vrms |
| Power and Battery | |||
| Power/Charger | recommend DC5V 2A< | recommend DC5V 1A | recommend DC5V 0.8~1A |
| Charging Indicator | Yes | Yes | Yes |
| Low battery Alarm | Yes | Yes | NO |
| Smart Charge | Yes | Yes | NO |
| Replaceable Battery | NO | NO | NO |
| Capacity | 880mAh | 1400mAh | 160mAH |
| Battery Life | > 13H | > 16H | > 13H |
| Charge Time | <3 h | <4 h | ≤90 mins |