The FiiO CLASS A is a fully discrete, fully balanced Class A transistor headphone amplifier and preamp rated at up to 4000mW + 4000mW balanced into 32Ω, powered by a custom 60W toroidal transformer, with five gain levels and ±10dB bass and treble. It suits desktop listeners who already own a DAC and want one amp that can be set for anything from sensitive IEMs to demanding full-size headphones.
Who the FiiO CLASS A is for
Hard-to-drive headphones: FiiO rates the balanced output at 4000mW + 4000mW into 32Ω and 1360mW + 1360mW into 300Ω at Ultra High gain.
Matching many headphones: Five gain steps from Low to Ultra High, plus ±10dB bass and treble knobs, let you set level and tone for each pair.
Speaker systems: XLR and RCA line outputs feed a power amp or powered speakers, and the 12V trigger in/out lets linked gear power on and off together.
Balanced sources: It takes RCA, 3.5mm, XLR and 4.4mm line inputs and drives 6.35mm, 4.4mm and 4-pin XLR headphone jacks.
Analog-sound fans: FiiO matches and hand-tunes each channel's discrete components for what it calls a warm, natural, distinctly analog sound.
Skip it if: you need a DAC or something portable; the CLASS A takes line-level inputs only and weighs about 3.5kg.
FiiO CLASS A key specs
Topology: Fully discrete, fully balanced Class A transistor amp (16 Toshiba twin and 8 Sanken audio transistors)
Balanced output (4.4mm / 4-pin XLR): ≥4000mW + 4000mW at 32Ω; ≥1360mW + 1360mW at 300Ω (Ultra High gain)
Single-ended output (6.35mm): ≥2850mW + 2850mW at 32Ω; ≥350mW + 350mW at 300Ω (Ultra High gain)
Output impedance: Under 1Ω (6.35mm), under 1.5Ω (balanced)
Gain and tone: 5 gain levels (Low, Medium, High, Super High, Ultra High); bass and treble ±10dB
Inputs: RCA and 3.5mm single-ended; XLR3 and 4.4mm balanced (line level)
Outputs: 6.35mm, 4.4mm and 4-pin XLR headphone jacks; XLR3 and RCA line outputs; 12V trigger in/out
Power supply: Custom 60W toroidal transformer, 20,000µF Nichicon capacitor bank, discrete regulation
Size and weight: About 213 × 239 × 67 mm; about 3500g
In the box: CLASS A, AC power cord, RCA cable, dust caps, spare fuse, quick start guide
Genuine FiiO stock. Free shipping on every order, 45-day returns.
FiiO CLASS A vs similar options
vs FiiO K9: Adds dual ES9068AS DACs, THX AAA 788+ amplification, DSD512 over USB and LDAC Bluetooth in one box; pick the CLASS A if you already own a DAC and want a fully discrete Class A amp.
vs Aune N7: Another fully discrete Class A headphone amp, with an R2R pre-stage and no op-amps; pick the CLASS A for its rated 4000mW + 4000mW balanced output and five gain levels.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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