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The FiiO ECHO NANO is a portable audio player that also serves as a USB DAC, designed to play a music library on the go or improve the audio conversion of a smartphone, tablet or computer. Its CS43131 chip supports PCM files up to 24 bit/192 kHz and DSD up to DSD256, to reproduce high-resolution recordings from the device or a USB source.
Designed for on-the-go listening, it combines micro-SD card playback, built-in controls and compatibility with the in-line controls of CTIA earphones. Its compact format and OLED screen make it easy to use daily, while the USB DAC mode allows it to be integrated into different devices depending on listening needs.
The FiiO ECHO NANO combines a mobile audio player and a USB DAC in a compact chassis inspired by MP3 players. Its CS43131 conversion chip supports PCM files up to 24 bit/192 kHz and DSD up to DSD256, to play high-resolution recordings or improve the audio conversion of a smartphone, tablet or computer.


UAC-compatible, the ECHO NANO works in plug-and-play as an external sound card: connected to a compatible device, it bypasses its internal audio circuit and entrusts the conversion to its dedicated DAC chip. The UAC mode also allows charging to be disabled, in order to limit the drain on the smartphone's battery during listening. In local playback, the device supports the DSD, WAV, FLAC, APE, MP3, M4A and OGG formats.
Its 0.91-inch OLED screen displays playback information with reduced power consumption, which helps preserve autonomy. The multifunction wheel built into the top of the chassis combines volume adjustment, power management and screen activation. The in-line controls of CTIA-compatible earphones also allow you to start or pause playback, change tracks and adjust the volume.


The micro-SD slot accepts cards up to 256 GB, allowing you to keep a music library on the device rather than relying on the smartphone's storage. Its aluminum and magnesium alloy chassis, CNC-machined, combines a pocket format with a finish designed to withstand daily wear. The ECHO NANO can thus serve as a standalone player or a USB DAC, depending on the source and listening mode sought.
Technical specifications
| Specifications | |
|---|---|
| Product type | DAP Portable DAC |
| Inputs | USB-C SD card |
| Outputs | Jack 3.5mm |
| DAC chips | CS43131 |
| Supported sampling rates | PCM up to 24bit 192kHz DSD up to DSD256 |
| Screen | OLED 0.91" |
| Supported audio formats | DSD, WAV, FLAC, APE, MP3, M4A, WMA, OGG |
| Storage | SD card slot 256GB max |
| Autonomy | 7h |
| Charging time | 2.5h |
| Processor | Rockchip RK NanoD |
| Jack 3.5mm output specification, Local playback, Low gain | |
|---|---|
| Output power | ≥60mW+60mW (16Ω, THD+N<1%, 1.0Vrms) ≥30mW+30mW (32Ω, THD+N<1%, 1.0Vrms) ≥5mW+5mW (300Ω, THD+N<1%, 1.0Vrms) |
| Signal-to-noise ratio (SNR) | ≥123dB (A-weighted) |
| Frequency response | 20Hz-85kHz (-2dB) |
| Output impedance | <0.2Ω (32Ω) |
| Crosstalk | ≥76dB |
| Output level | 2.9Vp-p |
| Total harmonic distortion more noise (THD+N) | <0.0004% (1kHz/120dB@32Ω) |
| Noise floor | <0.7uV (A-weighted) |
| Dynamic range | ≥121dB (A-weighted) |
| Output specification Jack 3.5mm, Local playback, High gain | |
|---|---|
| Output power | ≥125mW+125mW (16Ω, THD+N<1%, 1.4Vrms) ≥125mW+125mW (32Ω, THD+N<1%, , 2.0Vrms) ≥15mW+15mW (300Ω, THD+N<1%, 2.0Vrms) |
| Signal-to-noise ratio (SNR) | ≥129dB (A-weighted) |
| Frequency response | 20Hz-85kHz (-2dB) |
| Output impedance | <0.3Ω (32Ω) |
| Crosstalk | ≥75dB |
| Output level | 5.8Vp-p |
| Total harmonic distortion more noise (THD+N) | <0.0003% (1kHz/119dB@32Ω) |
| Noise floor | <0.7uV (A-weighted) |
| Dynamic range | ≥127dB (A-weighted) |
| Output specification Jack 3.5mm, USB DAC, Low gain | |
|---|---|
| Output power | ≥60mW+60mW (16Ω, THD+N<1%, 1.0Vrms) ≥30mW+30mW (32Ω, THD+N<1%, 1.0Vrms) ≥5mW+5mW (300Ω, THD+N<1%, 1.0Vrms) |
| Signal-to-noise ratio (SNR) | ≥114dB (A-weighted) |
| Dynamic range | ≥103dB (A-weighted) |
| Frequency response | 20Hz-20kHz (-0.2dB) |
| Output impedance | <0.3Ω (32Ω) |
| Crosstalk | ≥76dB |
| Output level | 2.9Vp-p |
| Total harmonic distortion more noise (THD+N) | <0.0019% (1kHz/-3dB@32Ω) |
| Noise floor | <1.9uV (A-weighted) |
| Output specification Jack 3.5mm, USB DAC, High gain | |
|---|---|
| Output power | ≥125mW+125mW (16Ω, THD+N<1%, 1.4Vrms) ≥125mW+125mW (32Ω, THD+N<1%, 2.0Vrms) ≥15mW+15mW (300Ω, THD+N<1%, 2.0Vrms) |
| Signal-to-noise ratio (SNR) | ≥120dB (A-weighted) |
| Dynamic range | ≥103dB (A-weighted) |
| Frequency response | 20Hz-20kHz (-0.3dB) |
| Output impedance | <0.3Ω (32Ω) |
| Crosstalk | ≥75dB |
| Output level | 5.8Vp-p |
| Total harmonic distortion more noise (THD+N) | <0.0018% (1kHz/-3dB@32Ω) |
| Noise floor | <1.9uV (A-weighted) |
| General | |
|---|---|
| Dimensions | 84 x 23 x 14mm |
| Weight | 33.5g |
| Color | Black |
| Package | 1x FIIO ECHO NANO 1x USB-A to USB-C cable |
| Input | SD Card |
| Input | USB |
| Output | Jack 3.5mm |
| DAC / ADC Chip | CS43131 |
| Max sampling rate | 192kHz |
| Max sampling rate | DSD256 |
| Color | Black |
| Networking | No |
| Remote Control | No |