Fiio K13 R2R Compact Desktop DAC and Headphone Amplifier Bluetooth Hi-Res Silver

The FiiO K13 R2R is a compact desktop DAC and headphone amplifier in silver, built around a fully differential 24-bit R2R resistor-array DAC with 2400mW + 2400mW output, Bluetooth 5.4 with LDAC, and XLR and RCA preamp outputs. It belongs to FiiO's desktop DAC and amplifier range.

This listing is the Silver. The FiiO K13 R2R is also available in Black.

Key specifications

• DAC: fully differential true 24-bit R2R resistor arrays
• DAC modes: NOS / OS
• Headphone output power: 2400mW + 2400mW
• Decoding: PCM 384kHz/32bit and DSD256
• Bluetooth: 5.4 with LDAC, AAC and SBC
• EQ: 10-band PEQ with app and web interface control
• Outputs: XLR and RCA preamplifier / line output
• Power: DC / AC dual power supplies
• Colour: silver

FiiO K13 R2R highlights

• Fully differential true 24-bit R2R DAC resistor arrays
• NOS/OS dual modes
• 2400mW + 2400mW output
• Bluetooth 5.4 with LDAC/AAC/SBC codecs
• DC/AC dual power supplies
• 10-band PEQ with app and web interface control
• Fully balanced audio amplifier circuit
• XLR + RCA preamplifier/line output
• LCD display with constant indication function
• Adjustable RGB lighting and auto power off

Fully differential true 24-bit R2R resistor array DAC

FiiO's proprietary four-channel fully differential 24-bit R2R resistor array DAC uses 48 precision thin-film resistors per channel — 192 resistors across four channels in total. Each resistor has 0.1% accuracy and low temperature drift (30ppm), delivering a rich, musical sound.

Fully differential architecture

The K13 R2R's fully differential architecture reduces noise and FFT harmonics, producing a darker background than a typical DAC design.

Preamplifier and power amplifier output

The K13 R2R works as both a preamplifier and headphone amplifier, with a wide range of inputs and outputs. It supports PCM 384kHz/32bit and DSD256 decoding for high-resolution audio. If you need more power or connectivity, the FiiO K15 is available as a step-up option.

Fully balanced audio amplifier circuit

The entire signal chain — R2R DAC, LPF, volume control and headphone amp — uses fully differential processing for strong interference rejection, minimal distortion and high dynamic range. The amplifier also includes gain control, headphone protection and POP noise elimination.

Multi-rail power supply

Up to 18 low-noise LDOs and 5 DC-DC converters make up the multi-rail power supply, providing clean, stable power throughout the audio circuit.