FiiO GIGAS 1 Compact Desktop Headphone Amplifier Orange

The FiiO GIGAS 1 in Orange is a compact Class AB discrete transistor desktop headphone amplifier delivering up to 4600mW + 4600mW balanced output, part of FiiO's GIGAS amplifier range.

This listing is the Orange finish. The GIGAS 1 is also available in Green and Silver.

Key specifications

• Amplifier: Discrete Class AB transistor current-amplification circuit
• Output power: Up to 4600mW + 4600mW (balanced)
• Outputs: 4.4mm balanced and 3.5mm single-ended (3.5mm supports CTIA microphone passthrough)
• Inputs: RCA and 3.5mm
• Gain: High and low
• Power: USB-C, 5V 2A or 12V 2A PD
• Supported impedance: 8 to 350 ohms
• Dimensions: 132 x 60 x 40mm (excluding feet), 210g

The GIGAS 1 is a compact, high-power desktop headphone amplifier built around a discrete Class AB transistor current-amplification circuit. It delivers up to 4600mW + 4600mW balanced output and handles everything from sensitive IEMs to demanding planar and high-impedance full-size headphones. Dual headphone outputs, dual inputs, switchable gain, and dual-mode USB-C power are all included as standard.

Class AB Discrete Transistor | Current Amplification Headphone Amp Circuit

The GIGAS 1 uses an op-amp + transistor current-amplification design built around onsemi MJE243G/253G transistors for high-current, low-impedance output. Balanced output reaches up to 4600mW + 4600mW, giving full-size headphones and IEMs plenty of headroom.

Dual Headphone Outputs | Seamlessly Compatible

A 3.5mm single-ended and a 4.4mm balanced output cover a wide range of headphone connections. The 3.5mm jack supports CTIA-compliant microphone passthrough for gaming, calls, and multimedia use.

Dual Input Ports | Flexible Connectivity

Both 3.5mm and RCA inputs are included, making it easy to connect digital audio players, smartphones, computers, or CD players. If you're looking for a capable source to pair with the GIGAS 1, the FiiO K15 Desktop DAC and Headphone Amplifier is worth considering as a desktop stack companion.

Two Adjustable Gain Levels | Compatible with All Types of Headphones

A toggle switch selects between high and low gain. Low gain suits sensitive IEMs; high gain handles low-sensitivity planar and high-impedance headphones.

Type-C Dual-mode Power Supply | Automatic Adaptation

The USB-C port accepts both standard 5V and 12V PD power, switching automatically between modes. A 5V supply via computer or adapter is sufficient for most headphones; a 12V PD supply unlocks full output power, dynamics, and soundstage.

Minimalist Design | Effortless Control

The aluminium alloy chassis is compact enough for tight desktop setups at 132 x 60 x 40mm. An oversized volume knob and mechanical toggle switches keep everyday operation straightforward.

Multiple Colour Options | Elevate Your Desktop Aesthetics

The anodised aluminium alloy chassis is available in multiple colours, each with a finely textured finish and warm retro lighting. The Orange finish suits a range of desktop styles, from minimalist workspaces to gaming setups.