FiiO GIGAS 1 Compact Desktop Headphone Amplifier Silver

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

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

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 low-sensitivity planar and high-impedance full-size headphones. Dual headphone outputs, dual inputs, two gain levels, and a dual-mode USB-C power supply make it a flexible desktop HiFi hub.

Class AB Discrete Transistor | Current Amplification Headphone Amp Circuit

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

Dual Headphone Outputs | Seamlessly Compatible

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

Dual Input Ports | Flexible Connectivity

Both 3.5mm and RCA inputs are provided, making it straightforward to connect digital audio players, smartphones, computers, or CD players as a source.

Two Adjustable Gain Levels | Compatible with All Types of Headphones

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

Type-C Dual-mode Power Supply | Automatic Adaptation

The USB-C port accepts standard 5V 2A or 12V 2A PD power and switches between them automatically. A 5V supply is sufficient for most headphones; a 12V PD supply unlocks the amplifier's full output power, dynamics, and soundstage.

Minimalist Design | Effortless Control

The aluminium alloy chassis is compact enough for tight desktop setups. An oversized volume knob and mechanical toggle switches keep operation simple from the outset.

Multiple Colour Options | Elevate Your Desktop Aesthetics

The anodised aluminium alloy chassis is available in multiple colours, each with a finely textured finish and a warm retro lighting effect. The GIGAS 1 suits minimalist workspaces, vintage setups, and gaming rigs alike.