FiiO K13 R2R B - Desktop DAC and Headphone Amplifier BLACK
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The FiiO K13 R2R is a high-end balanced desktop DAC/amplifier featuring a true 24-bit R2R architecture with a fully differential resistor array. Using thin-film resistors with 0.1% tolerance and 30 ppm thermal drift, it ensures extremely linear conversion and natural, dynamic, and transparent sound.
It features dual NOS/OS modes, allowing you to choose between pure analog playback or oversampling processing up to 384 kHz. The fully balanced amplifier delivers 2400 mW + 2400 mW into 32 Ω, ensuring maximum authority even with high-impedance headphones.
The K13 R2R integrates Bluetooth 5.4 with LDAC codec, dual DC/AC power supply for stable and silent power delivery, and a high-precision 10-band PEQ for acoustic calibration. XLR and RCA outputs make it perfect as a DAC, amplifier, or preamplifier in hi-fi-level audio systems.
Enclosed in an elegant aluminum unibody chassis with an LCD display and minimalist design, the FiiO K13 R2R represents the ideal synthesis of traditional R2R engineering and modern digital technology.
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True 24-bit Fully Differential R2R DAC
The FiiO K13 R2R integrates an exclusive 24-bit fully differential R2R DAC developed by FiiO, based on precision resistor arrays: 48 thin-film resistors per channel, for a total of 192 resistors. Each resistor guarantees 0.1% accuracy and extremely low thermal drift (30 ppm). This R2R architecture allows the K13 R2R to deliver rich, musical, and incredibly natural sound, for an authentically analog listening experience.
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Fully Differential Architecture
Unlike traditional DACs, the K13 R2R uses a fully differential architecture that significantly reduces background noise and unwanted harmonics. The result is a darker background, greater instrument separation, and cleaner, more transparent music reproduction.
NOS and OS Modes: Dual Sound Signature
The K13 R2R offers two operating modes to suit every type of listener:
• NOS Mode
• OS Mode
It also supports native 1-bit DSD decoding. When playing DSD, it is normal to experience a slightly lower volume; simply adjust the volume to your desired level.
NOS (Non-Oversampling) Mode – Decode at the original sampling rate to maintain signal integrity, delivering an organic, warm, and natural sound.
OS (Oversampling) Mode – Global oversampling up to 384 kHz for more refined, dynamic, and detailed reproduction.
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Preamplifier and Amplifier
Thanks to its extensive input and output options, the FiiO K13 R2R can function as both a preamplifier and a headphone amplifier, adapting to any desktop setup. It supports 384 kHz/32-bit PCM and DSD256 decoding, ensuring faithful reproduction, rich in detail and musical nuance.
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10-Band PEQ: Customize Your Sound
Based on the powerful XMOS XU316 platform, the K13 R2R integrates a 10-band parametric equalizer (PEQ) accessible via the FiiO app or web interface. With FiiO's proprietary algorithm, you can:
• use presets like Retro PEQ;
• simulate and correct headphone response curves;
• export, share, and save your audio profiles;
• use auto-EQ for intelligent tuning.
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Fully Balanced Amplifier Circuit
The entire audio chain—DAC R2R, LPF filter, volume control, and headphone amplifier—is fully balanced. This ensures extremely high dynamic range, minimal distortion, and resistance to interference. The circuit also includes gain control, headphone protection, and POP noise suppression for stable and quiet listening.
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Custom-Designed Power Supply
The K13 R2R uses a dual AC/DC power supply with a 30W switching power supply, shielded by a nickel-plated alloy cover for maximum noise immunity. An external DC input is also available, allowing the use of a premium linear power supply for further sound optimization.
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Multi-Rail Architecture
With 18 low-noise LDOs and 5 DC-DC converters, the K13 R2R adopts multi-rail distribution to provide stable and quiet power to each section of the circuit. The result is robust power delivery and an extremely clean signal.
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High-quality audiophile components
Selected ELNA RA3 silk film and tantalum electrolytic capacitors ensure a warm, natural sound response with excellent microdynamics. These premium components contribute to signal purity and overall system stability.
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Powerful output, detailed sound
With a balanced power output of 2400 mW + 2400 mW into 32 Ω, the FiiO K13 R2R effortlessly drives both high-sensitivity IEMs and full-size headphones, enhancing every detail of the recording and ensuring impeccable control and dynamics.
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Minimalist design with technological elegance
The FiiO K13 R2R boasts a minimalist and refined design, crafted with a sturdy, thick aluminum alloy unibody chassis for solidity and a premium feel. The new "skylight" design, inspired by the K11 series, introduces a true technological window that highlights the sophisticated R2R architecture within. Dynamic light reflections and vibrant colors create a modern and futuristic visual effect, symbolizing the perfect fusion of art and audio technology.
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Dual control knobs for intuitive and precise interaction
Infrared remote control included for convenient use even from a distance
Compatible with the FiiO Control app, to manage settings, PEQ, and advanced functions directly from your smartphone
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Bluetooth 5.4 Hi-Res Connectivity
Thanks to Bluetooth 5.4 with support for LDAC, AAC, and SBC codecs, the K13 R2R enables high-resolution wireless listening, maintaining superior sound quality even in wireless mode.
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Three Gain Levels and Independent Volume Curves
The K13 R2R offers three gain levels and dedicated volume curves to perfectly match different headphones and IEMs. Additionally, the headphone output (PO) and preamp (PRE) volume levels can be stored separately, for precise control at all times.
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Built-in Protections
The device includes overheating and overload protections, which automatically activate in the event of abnormal conditions to safeguard the unit and ensure maximum safety.
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Customizable RGB Lighting
The K13 R2R's RGB logo indicates the sampling rate in use and can be customized in terms of color, brightness, and light effect (static or pulsating), adding a distinctive aesthetic touch to your audio setup.
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Programmable Power Off Timer from 1 to 99 Minutes
Adjustable sleep timer function (1–99 minutes), useful for evening listening sessions or to save energy. The timer must be set each time you use it.
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Package Contents
1 K13 R2R x 1
2 Infrared Remote Control x 1
3 AC Power Cord x 1
4 Quick Start Guide x 1
5 Warranty Card x 1
6 Headphone Adapter x 1
7 USB Data Cable x 1
