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| FiiO GIGAS 1 Desktop Headphone Amplifier Specifications | |
| Product Type | Desktop Headphone Amplifier |
| Amplification Circuit | 4 × Onsemi MJE243G Transistors + 4 × Onsemi MJE253G Transistors |
| Compatible Headphone Impedance | 8Ω – 350Ω |
| Headphone Outputs | 3.5 mm Single-Ended (SE), 4.4 mm Balanced |
| Inputs | RCA, 3.5 mm |
| Microphone Support | Supported via 3.5 mm Headphone Output |
| Controls | Volume Knob, Gain Switch, Power Switch |
| Frequency Response | 20 Hz – 200 kHz (Attenuation <0.4 dB) |
| Signal-to-Noise Ratio (SNR) | ≥116 dB (A-weighted) |
| Noise Floor | <10.6 μV (A-weighted) |
| THD+N | <0.00057% (1 kHz / -5 dB @ 32Ω) |
| Output Impedance (3.5 mm SE) | <1Ω |
| Output Impedance (4.4 mm Balanced) | <1.5Ω |
| Power Input | USB Type-C |
| Power Supply | 5V/2A or 12V/2A |
| Chassis Material | Aluminum Alloy |
| Available Colours | Black, Silver, White, Orange, Green |
| Dimensions (W × D × H) | 132 × 60 × 40 mm (excluding amplifier feet) |
| Weight | 210 g |