| General Specifications |
| Name/Model |
M33 R2R |
Hardware solution |
SoC: Qualcomm Snapdragon 680, DAC: FIIO proprietary R2R DAC, USB DAC: XU316; |
| Working modes |
Android/Pure Music/AirPlay/USB DAC/Bluetooth reception |
| Colors |
Retro gold/dark blue/black |
Weight |
About 258g |
| Dimensions |
About 138.2x71.5x17mm |
Volume control |
Button control |
| Display |
5.5-Inch (1080x2160) fully laminated screen |
Internal storage/Usable storage (ROM) |
128GB/About 112GB |
| Memory (RAM) |
8GB |
Recommended headphone impedance |
PO: 8~350Ω |
| Memory card |
Supports up to 2TB |
BAL: 8~350Ω |
| Channel balance |
L20~R20 (0.5dB per level) |
Gain selection |
Over-ear headphone mode (Connect a fast charger)/High/Medium/Low |
| Buttons and Ports |
| Buttons |
Power button*1, Volume button*2, Multifunction button*1, Play/Pause button*1, Previous track*1, Next track*1 |
USB |
Type-C USB3.0*1 (Charging/Data transfer)+Type-C POWER IN*1 (Charging/Independent power supply interface) |
| Slide switch |
D.MODE button*1 |
Headphone output |
Standard 3.5mm port |
| Line output |
Standard 3.5mm port (shared PO) |
Coaxial output |
Standard 3.5mm port (shared PO) |
| Balanced headphone output |
Standard 4.4mm port |
Balanced line output |
Standard 4.4mm port (shared BAL) |
| Special Functions |
| WiFi |
2.4GHz/5GHz, DLNA/AirPlay/WiFi music transfer |
Bluetooth transmission (5.0) |
SBC/aptX/aptX HD/LDAC/LHDC |
| Bluetooth reception (5.0) |
SBC/LDAC |
Remote control |
Supports WiFi control |
| MQA |
Supports global decoding |
ALL TO DSD |
Yes |
| PEQ |
Supports 10-band PEQ and AUTO EQ |
Sound profiles |
Natural sound/Warmer sound |
| Maximum sampling rates |
Local DAC: Supports up to 384kHz/32bit; DSD256 (Native) |
Double click to wakeup |
Yes |
| USB DAC: Supports up to768kHz/32bit; DSD512 (Native) |
Screen rotation |
Yes |
| USB Audio: 768kHz/32bit; DSD512 (Supports DoP/D2P/Native) |
Operation |
Supports gesture control, two-button and three-button navigation. |
| Coaxial output: Supports up to 384kHz/24bit; DSD128 (DOP/D2P) |
Power-off timers |
Supports idle poweroff/sleep |
| Firmware update |
Supports local storage upgrade+microSD card local upgrade+OTA push upgrade |
|
|
| Power Supply Parameters |
| Power supply |
PD2.0/PD3.0 PPS fast charging |
Charging time |
About 1.5h (PD3.0 PPS fast charging) |
| Battery life and test conditions: |
| 3.5mm headphone output: 15.5h |
| Volume level |
43 |
Gain |
High gain |
| Display status |
OFF |
Playback track and format |
MP3 44kHz/16bit |
| EQ |
OFF |
Load |
32Ω |
| Personalized sound |
Natural sound: NOS |
|
|
| 4.4mm balanced output: 13.5h |
| Volume level |
31 |
Gain |
High gain |
| Display status |
OFF |
Playback track and format |
MP3 44kHz/16bit |
| EQ |
OFF |
Load |
32Ω |
| Personalized sound |
Natural sound: NOS |
|
|
| Audio Parameters |
| Performance and parameters of headphone output (3.5mm output, Local playback/USB DAC, Natural sound, Over-ear headphone mode) |
| Output power 1 |
L+R≥540mW+540mW (16Ω, THD+N＜1%, 2.9Vrms) |
Output impedance |
＜0.8Ω (32Ω) |
| Output power 2 |
L+R≥470mW+470mW (32Ω, THD+N＜1%, 3.9Vrms) |
Crosstalk |
≥74dB (1kHz@32Ω) |
| Output power 3 |
L+R≥60mW+60mW (300Ω, THD+N＜1%, 4.2Vrms) |
Noise floor |
＜5.5μV (A-weighted) |
| THD+N |
PCM: 0.0183% |
SNR |
≥117dB (A-weighted) |
| DSD: 0.0033% |
Dynamic range |
≥114dB |
| Frequency response |
20Hz~20kHz: attenuation＜1.3dB |
Peak output voltage |
＞12Vp-p |
| 20Hz~40kHz: attenuation＜3dB |
|
|
| Performance and parameters of headphone output (3.5mm output, Local playback/USB DAC, Natural sound, High gain) |
| Output power 1 |
L+R≥465mW+465mW (16Ω, THD+N＜1%, 2.7Vrms) |
Output impedance |
＜0.8Ω (32Ω) |
| Output power 2 |
L+R≥300mW+300mW (32Ω, THD+N＜1%, 3.1Vrms) |
Crosstalk |
≥74dB (1kHz@32Ω) |
| Output power 3 |
L+R≥50mW+50mW (300Ω, THD+N＜1%, 3.9Vrms) |
Noise floor |
＜4.9μV (A-weighted) |
| THD+N |
PCM: 0.0186% |
SNR |
≥116dB (A-weighted) |
| DSD: 0.0033% |
Dynamic range |
≥113dB |
| Frequency response |
20Hz~20kHz: attenuation＜1.3dB |
Peak output voltage |
＞10Vp-p |
| 20Hz~40kHz: attenuation＜3dB |
|
|
| Performance and parameters of single-ended line output (3.5mm output, Local playback/USB DAC, Natural sound) |
| THD+N |
PCM: 0.0182% |
SNR |
≥116dB (A-weighted) |
| DSD: 0.0034% |
Noise floor |
＜3uV (A-weighted) |
| Crosstalk |
≥103dB |
Dynamic range |
≥104dB |
| Frequency response |
20Hz~20kHz: attenuation＜1dB |
Line output level |
2Vrms (1kHz@10kΩ) |
| 20Hz~60kHz: attenuation＜3dB |
|
|
| Performance and parameters of balanced headphone output (4.4mm output, Local playback/USB DAC, Natural sound, Over-ear headphone mode) |
| Output power 1 |
L+R≥540mW+540mW (16Ω, THD+N＜1%, 2.9Vrms) |
Output impedance |
＜1.5Ω (32Ω) |
| Output power 2 |
L+R≥1100mW+1100mW (32Ω, THD+N＜1%, 6Vrms) |
Crosstalk |
≥104dB (1kHz@32Ω) |
| Output power 3 |
L+R≥240mW+240mW (300Ω , THD+N＜1%, 8.5Vrms) |
Noise floor |
＜10.3μV (A-weighted) |
| THD+N |
PCM: 0.0171% |
SNR |
≥116dB (A-weighted) |
| DSD: 0.0033% |
Dynamic range |
≥115dB |
| Frequency response |
20Hz~20kHz: attenuation＜1.3dB |
Peak output voltage |
＞24Vp-p |
| 20Hz~40kHz: attenuation＜3dB |
|
|
| Performance and parameters of balanced headphone output (4.4mm output, Local playback/USB DAC, Natural sound, High gain) |
| Output power 1 |
L+R≥540mW+540mW (16Ω, THD+N＜1%, 2.9Vrms) |
Output impedance |
＜1.5Ω (32Ω) |
| Output power 2 |
L+R≥900mW+900mW (32Ω, THD+N＜1%, 5.4Vrms) |
Crosstalk |
≥104dB (1kHz@32Ω) |
| Output power 3 |
L+R≥165mW+165mW (300Ω , THD+N＜1%, 7Vrms) |
Noise floor |
＜9.1μV (A-weighted) |
| THD+N |
PCM: 0.0180% |
SNR |
≥116dB (A-weighted) |
| DSD: 0.0033% |
Dynamic range |
≥114dB |
| Frequency response |
20Hz~20kHz: attenuation＜1.3dB |
Peak output voltage |
＞20Vp-p |
| 20Hz~40kHz: attenuation＜3dB |
|
|
| Performance and parameters of balanced line output (4.4mm output, Local playback/USB DAC, Natural sound) |
| THD+N |
PCM: 0.0163% |
SNR |
≥118dB (A-weighted) |
| DSD: 0.0034% |
Noise floor |
＜4.9uV (A-weighted) |
| Crosstalk |
≥105dB |
Dynamic range |
≥114dB |
| Frequency response |
20Hz~20kHz: attenuation＜1dB |
Line output level |
4Vrms (1kHz@10kΩ) |
| 20Hz~60kHz: attenuation＜3dB |
|
|
| Audio format supported |
| Lossless: |
DSD: DSD64/128/256 (".iso", ".dsf", ".dff"), DST iSO
DXD: 352.8kHz/24bit
APE FAST/High/Normal: 384kHz/24bit (MAX)
APE Extra High: 192kHz/24bit (MAX)
APE Insane: 96kHz/24bit (MAX)
Apple Lossless: 384kHz/32bit (MAX)
AIFF: 384kHz/32bit (MAX)
FLAC: 384kHz/32bit (MAX)
WAV: 384kHz/32bit (MAX)
WMA LOSSLESS: 96kHz/24bit (MAX) |
| Lossy compression: |
MP3, OGG, WMA, etc. |
