Fiio K13 R2R - Black - Balanced DAC with Headphone Amplifier

✴️ FiiO K13 R2R✴️ Balanced DAC with headphone amplifier✴️ 24-bit R2R matrix with 192 resistors✴️ Bluetooth 5.4 with LDAC, PEQ, RGB

⭕️ Features and characteristics✅ Fully differential 24-bit R2R DAC converter with 192 resistors✅ Dual NOS and OS decoding modes✅ Supports PCM 384kHz/24bit and DSD256✅ XLR and RCA outputs (PRE/LINE)✅ 10-band PEQ equalizer with app and browser control✅ Fully balanced audio amplifier circuit with protection functions✅ Dual DC/AC power supply with shielded internal power supply and external DC input option✅ ELNA RA3 audiophile-grade capacitors✅ Balanced output 2400mW + 2400mW at 32Ω load✅ Custom HD LCD display with continuous backlight function✅ Minimalist aluminum casing with a "skylight" type light accent✅ Bluetooth 5.4 with LDAC, AAC, SBC✅ Adjustable RGB backlight and auto-off function

✅ A new dimension of listening to musicK13 R2R is a fully balanced DAC and headphone amplifier for desktop applications, based on FIIO's proprietary technology – a 24-bit R2R resistor ladder. The device offers an impressive output power of 2400mW + 2400mW and a wide range of tuning and connectivity options. Thanks to the dual NOS/OS modes, Bluetooth connectivity with LDAC support, and a precise 10-band PEQ equalizer, the K13 R2R allows for full control over both the character and quality of the sound.

✅ Fully differential 24-bit R2R converter DACThe heart of the K13 R2R model are four channels of resistor matrices, each containing 48 precision thin-film resistors – a total of 192 elements. Each resistor was matched with an accuracy of 0.1%, and its parameters are characterized by exceptionally low sensitivity to temperature changes.. The effect is a true, fully differential R2R DAC converter with 24-bit resolution, which offers a rich, natural, and organic sound. Reduced FFT harmonics translate to a darker background and lower noise levels – so you hear only the music, without interference.

✅ Double pleasure thanks to NOS/OSK13 R2R modes offers two operating modes that allow you to adjust the sound to your own preferences:NOS Mode (Non-Oversampling) – preserves the original sampling rate during decoding, which translates to authentic, natural sound and a more organic musical experience.OS Mode (Oversampling) – globally increases the sampling rate to 384kHz, ensuring higher sound quality, greater clarity, and precision in detail reproduction.

✅ Precise 10-band PEQAdjust the sound to your own preferences with the built-in parametric equalizer, based on the XMOS XU316 chip and FIIO's proprietary tuning algorithm. The corrector allows adjustment in 10 bands in all operating modes of the device. Using the FIIO Control app or the web interface, you can load ready-made presets such as "Retro PEQ", adjust the characteristics for specific headphone models, or share your own EQ settings.

✅ Balanced from start to finishFrom the DAC converter, through the low-pass filter (LPF), volume control, all the way to the headphone amplifier – the entire audio path in the K13 R2R is fully differential. This construction ensures minimal distortion, effective noise suppression, and preservation of full dynamics at every stage of the signal.. Additional functions such as gain control, headphone protection, and pop suppression on power-up (POP noise), make the system not only sonically clean but also safe to use. Adjust the sound to your own preferences thanks to the built-in parametric equalizer, based on the XMOS XU316 chip and FIIO's proprietary tuning algorithm.. The corrector allows adjustment in 10 bands in all operating modes of the device. Using the FIIO Control app or the web interface, you can load ready-made presets such as "Retro PEQ", adjust the characteristics for specific headphone models, or share your own EQ settings.

✅ Power always at handThanks to the balanced output of 2400mW + 2400mW at a 32Ω load, the K13 R2R effortlessly drives high-impedance headphones while maintaining the delicacy required by sensitive in-ear monitors (In-Ear Monitor). The device extracts the finest details from recordings without losing control over the sound. Adjust the sound to your own preferences thanks to the built-in parametric equalizer, based on the XMOS XU316 chip and FIIO's proprietary tuning algorithm.. The corrector allows adjustment in 10 bands in all operating modes of the device. Using the FIIO Control app or the web interface, you can load ready-made presets such as "Retro PEQ", adjust the characteristics for specific headphone models, or share your own EQ settings.

✅ Specially designed power supplyK13 R2R uses a dual DC/AC power supply system. The internal, shielded 30W power supply minimizes interference, and the external DC input allows experimentation with high-end linear power supplies. The multi-channel design includes 18 low-noise LDO stabilizers and 5 DC-DC converters, which deliver clean power to each segment of the circuit. Adjust the sound to your own preferences thanks to the built-in parametric equalizer, based on the XMOS XU316 chip and FIIO's proprietary tuning algorithm.. The corrector allows adjustment in 10 bands in all operating modes of the device. Using the FIIO Control app or the web interface, you can load ready-made presets such as "Retro PEQ", adjust the characteristics for specific headphone models, or share your own EQ settings.

The used audiophile-grade capacitors – ELNA RA3 electrolytic capacitors with silk foil and specialized tantalum capacitors – ensure a warm, stable sound and reliable operation.

✅ Precise construction, perfect soundThe K13 R2R offers three levels of gain and three independent volume control curves, allowing for optimal matching with different types of headphones – from sensitive IEMs to demanding high-impedance models. Additionally, the device separately remembers the volume settings for the headphone output (Purchase Order) i linear (PRE), ensuring listening comfort and consistency regardless of the configuration.

✅ Adjustable RGB backlightThe RGB backlight not only informs about the current audio sampling rate but also allows for full customization – you can adjust the brightness, color, and choose whether the light should pulse or remain static. Thanks to this, the device not only sounds exceptional, but also looks the way you like it.

✅ Automatic shut-off with a 1–99 minute timer A practical function that adapts to your needs – you can set the device to turn off automatically within 1 to 99 minutes. The timer works once after each activation, allowing for full control over the operating time without the need for manual switching off.

✅ In the set:1. K13 R2R x12. Pilot x13. Power cable x14. User manual x15. Warranty card x16. Headphone adapter x17. USB data cable x1

⚙️ Basic technical data• Color: black• Main control system (MCU): ESP32-S3• USB System: XMOS XU316• DAC Converter: fully differential, true 24-bit R2R DAC with resistor ladder• Volume control circuit: NJW1195AV• R2R and LPF Operational Amplifiers: OPA1642 ×4• LO Buffer: LTA8092 ×2• Headphone amplifier: OPA1642 ×2 + TPA6120A ×2➡️ Inputs and outputs• USB input: 384kHz/32bit, DSD256• Coaxial input: 192kHz/24bit, DSD64• Optical input: 192kHz/24bit• USB Connector: dual Type-C• Display: non-standard LCD➡️ Power supply and dimensions• Power supply: AC 100–240V 50/60Hz; DC 12V/2.5A• Dimensions: approx. 210 × 188 × 42 mm (with legs)• Weight: about 980 g➡️ Output power• Unbalanced output 1: L+P ≥1220mW + 1220mW (32Ω, THD+N