FiiO Class A – Pure Class A desktop headphone amp

The Class A is a fully discrete desktop headphone amplifier for listeners who want true analog drive. A pure Class A circuit delivers 1000 mW per channel with a warm, low-distortion character, fed by a custom toroidal transformer and a discrete regulated supply.

Key Features

• Pure Class A discrete design: Fully discrete transistor circuit for warm, low-distortion analog drive.
• 1000 mW + 1000 mW: Ample power for demanding headphones, including planars.
• Custom 60 W toroidal transformer: Discrete regulated supply for a clean, quiet noise floor.
• Five gain levels: Match sensitive in-ears through to power-hungry full-size headphones.
• Balanced and single-ended I/O: 4.4 mm, XLR, 3.5 mm headphone outputs plus RCA and XLR line in and out.
• Independent bass and treble: Tactile tone shaping, plus 12V trigger in and out for system integration.

Customer Benefits

Pure Class A amplification trades efficiency for sound quality, holding the output stage in its most linear region for a smooth, low-distortion presentation. The Class A backs that with a custom toroidal transformer and discrete regulation to keep the noise floor low, while five gain levels and both balanced and single-ended outputs let it drive almost anything on the desk. With RCA and XLR line outputs it also doubles as a preamplifier into a wider system.

Quick Specs

• Amplifier type: Fully discrete pure Class A
• Output power: 1000 mW + 1000 mW
• Power supply: Custom 60 W toroidal transformer, discrete regulation
• Gain: 5 levels
• Headphone outputs: 3.5 mm, 4.4 mm balanced, 4-pin XLR
• Line I/O: RCA and XLR in and out
• Extras: Independent bass and treble, 12V trigger in/out

What’s in the Box

• FiiO Class A headphone amplifier
• AC power cord
• RCA cable
• Dust caps and spare fuse
• Quick start guide and warranty card

Ideal For

Headphone enthusiasts after analog Class A drive, balanced setups, and desktops that double as a preamp into a larger system.

Pros & Cons

✅ Pros:

• True pure Class A, fully discrete analog drive
• Plenty of power with five gain levels for any headphone
• Balanced and single-ended outputs, plus line in and out
• Doubles as a preamplifier into a wider system

⚠ Cons:

• Runs warm by design, as pure Class A always does
• No built-in DAC, so it needs a separate source or DAC

For a desktop that puts analog Class A sound first, the Class A is a focused, flexible amplifier.