FiiO WARMER R2R B - Tube Buffer and Desktop DAC BLACK

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The FiiO WARMER R2R is an advanced tube buffer and desktop DAC designed to deliver a warm, analog-like listening experience rich in detail. Thanks to the fully differential R2R architecture, based on true 24-bit resistor arrays, the digital signal is converted extremely naturally, delivering an authentic and refined sound. The use of four JJ Electronic E88CC tubes further enhances the musicality, adding a level of three-dimensionality and smoothness that is difficult to match with traditional solutions.

The WARMER R2R is designed to easily integrate into any audio chain, thanks to USB, optical, and coaxial inputs and RCA and XLR line outputs that ensure a stable and versatile connection to amplifiers, active speakers, or complete Hi-Fi systems. The 46W low-noise, low-ripple linear power supply ensures clean power management, reducing interference and distortion to maintain pristine signal quality. On the front, the LED-backlit mechanical VU meters add an elegant and professional aesthetic touch, as well as offering immediate visual feedback on signal dynamics.

The result is a device designed for audio enthusiasts seeking a tube DAC and buffer capable of combining technical precision, analog musicality, and craftsmanship. Product images are indicative; the specifications of the actual model are accurate.

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The definitive setup for those who love warm, musical timbre

The FiiO WARMER R2R is inspired by the warm, analog sound tradition, reinterpreted with modern technology. As the name suggests, this R2R DAC is designed to deliver a warm, rich, and "tubey" reproduction, capable of imbuing music with an emotionally natural quality.

From the evocative, warm vintage VU meters to the synergy between the R2R DAC and the tube stage, the WARMER R2R transforms every listening session into an immersive experience.

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Complete Connectivity for Any System

Easily connect the WARMER R2R to any source or audio system.

• USB / Optical / Coaxial inputs: Compatible with smartphones, laptops, DAPs, CD players, and more, quickly selectable via a convenient rotary knob.

• Balanced RCA and XLR outputs: Ideal for powered speakers, amplifiers, external DACs, or headphone amplifiers, with the option of using both outputs simultaneously.

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Fully Differential Architecture

At the heart of the WARMER R2R is the R2R DAC developed by FiiO, featuring 192 high-precision thin-film resistors (48 per channel) with 0.1% tolerance and a thermal drift of just 30ppm.

This fully differential four-way design allows for extremely natural, musical, and immersive reproduction: the true hallmark of WARMER sound.

4 JJ Electronic E88CC tubes

The buffer stage is powered by 4 newly manufactured JJ Electronic E88CC tubes, imported from Slovakia.

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Main Features:

• ±28V power supply

• Estimated lifespan of up to 10,000 hours

• Optimized buffer circuit for an organic, smooth, and three-dimensional sound

Since 1993, JJ Electronic has been a leading global manufacturer of tubes, capacitors, and high-end audio components, widely used in hi-fi amplifiers and studio gear.

Vintage charm in motion

The WARMER R2R integrates two oversized mechanical VU meters, backlit with warm LEDs and controlled by a dedicated circuit. Each beat of the music causes the meters to vibrate in sync, adding a visual component that enriches the listening experience.

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Clean and totally stable

Power is provided by a 46W audio toroidal transformer, designed for minimal noise and linear performance. The advantages of the toroidal structure:

• High efficiency

• Low eddy current losses

• Uniform magnetic field with low dispersion

Result: an extremely clean power supply that allows the WARMER R2R to deliver precise, transparent, and interference-free sound.

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NOS / OS Mode

Two different approaches, one machine: choose the sonic character you prefer.

• NOS (Non-Oversampling): Playback at the original sample rate, for a more natural, fluid timbre that is closer to an analog experience.

• OS (Oversampling): Global upsampling up to 384kHz, for a more detailed, defined, and brilliant sound.

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UAC 1.0 / 2.0 support

The dedicated USB Type-C port allows simultaneous use and powering via an adapter, ensuring maximum compatibility with modern devices and consistently stable high-resolution listening.

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Package Contents

WARMER R2R x 1

AC power cable x 1

USB cable x 1

Spare fuse tube x 1

Quick start guide x 1

Warranty card x 1