Warm and smooth, with a relaxed low end and sweet, engaging vocals—lending the music a captivating emotional nuance.
Sanken Electric Audio Transistors
Precise and fast with incisive dynamics and strong control, delivering effortless
composure and authority in large-scale orchestral and rock performances.
100% Manually Calibrated Quiescent Current
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Unleash authentic Class A sound Carefully selected audio components
Built with carefully selected professional audio components, the CLASS A brings you the distinctive Class A experience: exceptional resolution paired with a warm, engaging musical character, balancing outstanding performance with effortless long-term listening.
8 WIMA film capacitors
20 ELNA audio capacitors
20 high-precision MELF resistors
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Pairs well with any headphones, Tailor your ideal sound Five gain levels + independent bass and treble controls
Low/Medium/High/Super High/Ultra High—5 Gain Levels
Five selectable gain levels make it easy to find the right gain setting for different headphones, helping each pair unlock its full potential.
±10dB Independent Bass & Treble Adjustment
Whether you prefer a more immersive low-frequency presentation or greater high-frequency clarity, you can easily fine-tune the sound to your preference.
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Well-defined soundstage,
Effortless dynamics High-speed voltage regulation with lightning-fast transient response
A split power supply design provides independent regulated power to the multiple amplification stages, ensuring a clean and stable power supply. The 20,000μF high-capacity, Nichicon audio-specific filter capacitors smooth the pulsating current after rectification while storing the energy needed for sudden dynamic peaks. They suppress mains-frequency ripple to deliver clean DC and a deep, black background; when drums or full orchestral tutti hit, they release that stored energy quickly, so dynamics stay controlled and the bass remains tight and powerful.
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Effortless high-power output ,
Fully balanced architecture
Featuring a fully balanced differential circuit architecture, the amplifier delivers strong interference rejection, low distortion, a spacious soundstage, and ample driving power. With up to 4,000mW + 4,000mW of balanced output into a 32Ω load, it effortlessly drives a wide range of headphones, unlocking their full sonic potential.
A built-in high-precision DC servo feedback circuit continuously monitors and automatically adjusts the output DC offset, correcting deviations and maintaining the output at zero DC offset. This not only protects your headphones, but also improves bass response and transparency, resulting in clearer sound, better control, and more refined low-frequency performance.
Restoring sonic truth
DC servo control
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Buttons and ports labeled
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Versatile connectivity, Comprehensive inputs and outputs
4 inputs
3.5mm single-ended, RCA single-ended, 4.4mm balanced, and XLR balanced—easily pairing with any source device.
2 line outputs
RCA single-ended and XLR balanced to effortlessly connect power amps or active speakers and expand your system.
3 headphone outputs
6.35mm, 4.4mm, and 4-pin XLR outputs to drive mainstream headphones on the market.
12V TRIG IN/OUT bidirectional trigger
Link with upstream sources or control downstream amplifiers and speakers for convenient, one-touch power-on/off across your complete HiFi system.
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Clean power delivery, Unleashing the potential of your sound Custom 60W toroidal transformer
Purpose-built for the high quiescent current demands of a Class A headphone amplifier, the transformer is painstakingly wound through multiple complex processes to provide efficient, low-interference, precise, and clean power—helping the amplifier fully realize its sonic potential.
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Multiple built-in protection circuits continuously monitor the device in real time and automatically respond when an abnormal condition is detected, helping protect both the amplifier and your headphones. Enjoy it worry-free for years to come.
Comprehensive protection, For your equipment and headphones
DC output
protection
Power input
overcurrent
protection
Headphone amp
temperature protection
Overvoltage
protection OVP
Output overload
detection
Transformer thermal
protection
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FIIO's desktop HiFi system is purpose-built for the desk—from source to DAC to headphone amplifier, every component shares a unified size and design language, keeping your setup clean and tidy. No need to worry about matching components; simply enjoy an immersive, pure analog listening experience.
Retro desktop HiFi system, Immerse yourself in rich analog sound
DP11+WARMER R2R+CLASS A
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Packing List
①-------------------- CLASS A*1
②------------------------ Dust cap
③---------------------------- Fuse
④--------------Warranty card*1
⑤-------------AC power cord*1
⑥------------------ RCA cable*1
⑦---------- Quick start guide*1
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Fully discrete transistor Class A headphone amplifier Rediscover the warmth of the analog era Selling points
As the core headphone amplifier of FIIO’s retro-style desktop HiFi system, CLASS A adopts a fully discrete Class A amplification circuit, meticulously built from individual audio transistors and carefully selected resistors and capacitors. Each channel's components are precisely matched and manually tuned to recreate a pure, warm, natural, and distinctly analog sound signature.
