This machine, USB, coaxial frequency response curve 1

test conditions: -5dB sine signal, super big ear mode, 20Hz-20kHz,4.4mm balanced output (32Ω load)

This machine, USB, coaxial frequency response curve 3

test conditions: -5dB sinusoidal signal, big ear mode, 20Hz-20kHz,4.4mm balanced output (32Ω load)

This machine, USB, coaxial frequency response curve 2

test conditions: -5dB sine signal, super big ear mode, 20Hz-85kHz,4.4mm balanced output (32Ω load)

Local, USB, coaxial distortion curve 1

test conditions: -6dB sinusoidal signal, super big ear mode, 4.4mm balanced headphone output (32Ω load)

This machine, USB, coaxial frequency response curve 4

test conditions: -5dB sinusoidal signal, big ear mode, 20Hz-85kHz,4.4mm balanced output (32Ω load)

This machine, USB, coaxial frequency response curve 5

test conditions: -5dB sinusoidal signal, 20Hz-20kHz,4.4mm balanced line output (10kΩ load)

This machine, USB, coaxial frequency response curve 6

test conditions: -5dB sinusoidal signal, 20Hz-85kHz,4.4mm balanced line output (10kΩ load)

Local, USB, coaxial distortion curve 2

test conditions: -6dB sinusoidal signal, big ear mode, 4.4mm balanced headphone output (32Ω load)

Local, USB, coaxial distortion curve 3

test conditions: -5dB sinusoidal signal, 4.4mm balanced line output (10KΩ load)

Local, USB, coaxial distortion curve 4

test conditions: -5dB sinusoidal signal, 3.5mm/6.35mm line output (10KΩ load)

This machine, USB, coaxial frequency response curve 7

test conditions: -5dB sinusoidal signal, 20Hz-20kHz,3.5mm/6.35mm line output (10Ω load)

This machine, USB, coaxial frequency response curve 8

test conditions: -5dB sinusoidal signal, 20Hz-85kHz,3.5mm/6.35mm line output (10kΩ load)

This machine, USB, coaxial frequency response curve 9

test conditions: -5dB sinusoidal signal, super big ear mode, 20Hz-20kHz,3.5mm/6.35mm headphone output (32Ω load)

This machine, USB, coaxial frequency response curve 10

test conditions: -5dB sinusoidal signal, super big ear mode, 20Hz-85kHz,3.5mm/6.35mm headphone output (32Ω load)

Local, USB, coaxial distortion curve 5

test conditions: -4dB sinusoidal signal, super big ear mode, 3.5mm/6.35mm headphone output (32Ω load)

This machine, USB, coaxial frequency response curve 11

test conditions: -5dB sinusoidal signal, big ear mode, 20Hz-20kHz,3.5mm/6.35mm headphone output (32Ω load)

This machine, USB, coaxial frequency response curve 12

test conditions: -5dB sinusoidal signal, big ear mode, 20Hz-85kHz,3.5mm/6.35mm headphone output (32Ω load)

Local, USB, coaxial distortion curve 6

test conditions: -6dB sinusoidal signal, big ear mode, 3.5mm/6.35mm headphone output (32Ω load)

General Specifications
Name/Model M27 Hardware Scheme Master control: Qualcomm Dragonwing6490; DAC: ES9039SPRO*2; USB DAC: XU316; Bluetooth decoding: QCC5181; Crystal oscillator: FCXO-05E*3
Working mode Android mode/Pure music mode/AirPlay mode/USB DAC mode/Bluetooth receiving mode/Coaxial decoding mode
Color Black/Titanium alloy Weight About 556g (Black)/About 630g (Titanium alloy)
Product Size About 157.4x85.1x28mm Volume Control Type Knob control
Screen 5.99-inch (1080x2160) bezel-less display screen Body Memory/User Free Space (ROM) 256GB/About 241GB
Operating memory (RAM) 8GB Recommended Adapt Headset Impedance PO:8~350Ω
Memory Card dual TF card expansion, the highest theoretical support 4TB (single card 2TB) BAL:8~350Ω
Channel Balance L20~R20 (0.5dB per level) Gain option Ultra high gain mode (when connected to fast charging)/Super high gain mode/High/Medium/Low
Buttons and Ports
Physical button Power knob with button*1/Volume knob*1; Multifunction button*1; Play/Pause*1; Previous track*1; Next track*1 USB Type-C USB3.0*1 (charging/data transmission)+Type-C POWER IN*1 (charging/independent power supply port)+Type-C USB HOST*1 (data transmission)
Toggle switch HOLD*1; D.MODE*1 Headphone output port Standard 3.5mm port+Standard 6.35mm port
Line output port Standard 3.5mm port+Standard 6.35mm port (shared PO port) Balanced output port Standard 4.4mm port
Balanced line output port Standard 4.4mm port (shared BAL port) Optical output port Optical port
Coaxial output port RCA port Coaxial input port RCA port (shared coaxial output port)
Characteristics
WiFi 2.4GHz/5GHz, supports DLNA, AirPlay, and WiFi song transmission, etc. Bluetooth transmission (5.2) SBC/AAC/aptX/aptX HD/aptX Adaptive/LDAC/LHDC
Bluetooth reception (5.4) SBC/AAC/aptX/aptX Lossless/aptX HD/aptX Adaptive/LDAC Remote control Support WiFi control
MQA supports global decoding ALL TO DSD Supported
PEQ supports 31-segment PEQ and AUTO EQ Second harmonic adjustment Supports 3-level adjustment
Maximum supported sampling rate Local decoding: Up to 768kHz/32bit; DSD512 (Native) Double tap to wake up Supported
USB DAC: Up to 768kHz/32bit; DSD512 (Native) Auto-rotate screen Supported
USB Audio: 768kHz/32bit; DSD512 (supports DoP/D2P/Native) System navigation mode Supports gesture navigation, 2-button navigation and 3-button navigation
Coaxial output: Up to 384kHz/24bit; DSD128 (DOP/D2P) Power off timers Support power-saving shutdown/sleep shutdown
Optical output: Up to 192kHz/24bit Firmware Upgrade Supports local storage upgrade+microSD card local upgrade+OTA upgrade
Coaxial decoding: Up to 192kHz/24bit 　 　
Power Supply Parameters
Power supply Supports QC3.0, QC4.0 and PD2.0, and PD3.0 PPS fast charging Charging time About 3 hours (PD3.0 PPS fast charging)
Battery life and test conditions
3.5mm/6.35mm headphone output: 9 hours
Volume 37 Gain Big Ear Mode
Display status Off Play tracks and formats MP3 44kHz/16bit
EQ Off Load 32 Ω
4.4mm balanced output: 8 hours
Volume 25 Gain Super high gain mode
Display status Off Play tracks and formats MP3 44kHz/16bit
EQ Off Load 32 Ω
Audio Parameters
Headphone output part performance parameters (3.5mm/6.35mm output, native playback/USB DAC/coaxial decoding, super big ear mode)
Output power 1 L+R≥2650mW+2650mW(16Ω,THD+N<1%,6.5Vrms) output impedance <0.5 Ω(32 Ω)
Output power 2 L+R≥1800mW+1800mW(32Ω,THD+N<1%,7.6Vrms) channel separation ≥ 77dB (1kHz @ 32Ω)
Output power 3 L+R≥200mW+200mW(300Ω ,THD+N<1%,7.8Vrms) distortion plus noise 0.00029%(1kHz/-4dB @ 32Ω)
bottom noise <3.9 μV(A-weighted) signal-to-noise ratio ≥ 126dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 122dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >22Vp-p
Headphone output part performance parameters (3.5mm/6.35mm output, native playback/USB DAC/coaxial decoding, big ear mode)
Output power 1 L+R≥1100mW+1100mW(16Ω,THD+N<1%,4.2Vrms) output impedance <0.5 Ω(32 Ω)
Output power 2 L+R≥660mW+660mW(32Ω,THD+N<1%,4.6Vrms) channel separation ≥ 77dB (1kHz @ 32Ω)
Output power 3 L+R≥80mW+80mW(300Ω ,THD+N<1%,4.9Vrms) distortion plus noise 0.00031%(1kHz/-6dB @ 32Ω)
bottom noise <3.3 μV(A-weighted) signal-to-noise ratio ≥ 123dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 120dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >14Vp-p
Headphone output part performance parameters (3.5mm/6.35mm output, native playback/USB DAC/coaxial decoding, high gain)
Output power 1 L+R≥900mW+900mW(16Ω,THD+N<1%,3.8Vrms) output impedance <0.5 Ω(32 Ω)
Output power 2 L+R≥470mW+470mW(32Ω,THD+N<1%,3.9Vrms) channel separation ≥ 77dB (1kHz @ 32Ω)
output power 3 L+R≥50mW+50mW(300Ω ,THD+N<1%,3.9Vrms) distortion plus noise 0.00034%(1kHz/-4dB @ 32Ω)
bottom noise <3.1 μV(A-weighted) signal-to-noise ratio ≥ 122dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 118dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >11Vp-p
Headphone output part performance parameters (3.5mm/6.35mm output, native playback/USB DAC/coaxial decoding, medium gain)
Output power 1 L+R≥360mW+360mW(16Ω,THD+N<1%,2.4Vrms) output impedance <0.5 Ω(32 Ω)
Output power 2 L+R≥185mW+185mW(32Ω,THD+N<1%,2.4Vrms) channel separation ≥ 77dB (1kHz @ 32Ω)
output power 3 L+R≥20mW+20mW(300Ω ,THD+N<1%,2.5Vrms) distortion plus noise 0.00038%(1kHz/0dB @ 32Ω)
bottom noise <3.0 μV(A-weighted) signal-to-noise ratio ≥ 118dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 115dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >7Vp-p
Headphone output part performance parameters (3.5mm/6.35mm output, native playback/USB DAC/coaxial decoding, low gain)
Output power 1 L+R≥140mW+140mW(16Ω,THD+N<1%,1.5Vrms) output impedance <0.5 Ω(32 Ω)
Output power 2 L+R≥70mW+70mW(32Ω,THD+N<1%,1.5Vrms) channel separation ≥ 77dB (1kHz @ 32Ω)
output power 3 L+R≥8mW+8mW(300Ω ,THD+N<1%,1.5Vrms) distortion plus noise 0.00054%(1kHz/-1dB @ 32Ω)
bottom noise <2.9 μV(A-weighted) signal-to-noise ratio ≥ 115dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 111dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >4.3Vp-p
Single-ended line output part performance parameters (3.5mm/6.35mm output, local playback/USB DAC/coaxial decoding)
distortion plus noise 0.00035%(1kHz/-5dB @ 32Ω) signal-to-noise ratio ≥ 124dB (A-weighted)
channel separation ≥ 108dB bottom noise <1.3uV(A weight)
frequency response 20Hz ~ 20kHz: attenuation <0.2dB dynamic range ≥ 120dB
20Hz ~ 85kHz: Attenuation <2.1dB Line Output Level 2.1Vrms (1kHz@10kΩ)
balanced headphone output part performance parameters (4.4mm output, native playback/USB DAC/coaxial decoding, super big ear mode)
Output power 1 L+R≥3500mW+3500mW(16Ω,THD+N<1%,7.5Vrms) output impedance <0.6 Ω(32 Ω)
Output power 2 L+R≥5000mW+5000mW(32Ω,THD+N<1%,12.7Vrms) channel separation ≥ 114dB (1kHz @ 32Ω)
output power 3 L+R≥805mW+805mW(300Ω ,THD+N<1%,15.5Vrms) distortion plus noise 0.00031%(1kHz/-6dB @ 32Ω)
bottom noise <7.6 μV(A-weighted) signal-to-noise ratio ≥ 125dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 123dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >44Vp-p
balanced headphone output part performance parameters (4.4mm output, native playback/USB DAC/coaxial decoding, big ear mode)
Output power 1 L+R≥2550mW+2550mW(16Ω,THD+N<1%,6.4Vrms) output impedance <0.6 Ω(32 Ω)
Output power 2 L+R≥2250mW+2250mW(32Ω,THD+N<1%,8.5Vrms) channel separation ≥ 114dB (1kHz @ 32Ω)
output power 3 L+R≥320mW+320mW(300Ω ,THD+N<1%,9.8Vrms) distortion plus noise 0.00036%(1kHz/-6dB @ 32Ω)
bottom noise <5.9 μV(A-weighted) signal-to-noise ratio ≥ 123dB (A-weighted)
frequency response 20Hz ~ 20kHz: Attenuation <0.1dB dynamic range ≥ 121dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >28Vp-p
balanced headphone output part performance parameters (4.4mm output, native playback/USB DAC/coaxial decoding, high gain)
Output power 1 L+R≥2550mW+2550mW(16Ω,THD+N<1%,6.4Vrms) output impedance <0.6 Ω(32 Ω)
Output power 2 L+R≥1850mW+1850mW(32Ω,THD+N<1%,7.7Vrms) channel separation ≥ 112dB (1kHz @ 32Ω)
output power 3 L+R≥200mW+200mW(300Ω ,THD+N<1%,7.8Vrms) distortion plus noise 0.00033%(1kHz/-5dB @ 32Ω)
bottom noise <5.4 μV(A-weighted) signal-to-noise ratio ≥ 123dB (A-weighted)
frequency response 20Hz ~ 20kHz: attenuation <0.1dB dynamic range ≥ 120dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >22Vp-p
balanced headphone output part performance parameters (4.4mm output, local playback/USB DAC/coaxial decoding, medium gain)
Output power 1 L+R≥1400mW+1400mW(16Ω,THD+N<1%,4.8Vrms) output impedance <0.6 Ω(32 Ω)
Output power 2 L+R≥730mW+730mW(32Ω,THD+N<1%,4.8Vrms) channel separation ≥ 112dB (1kHz @ 32Ω)
Output power 3 L+R≥80mW+80mW(300Ω ,THD+N<1%,4.9Vrms) distortion plus noise 0.00041%(1kHz/-6dB @ 32Ω)
bottom noise <5.0 μV(A-weighted) signal-to-noise ratio ≥ 120dB (A-weighted)
frequency response 20Hz ~ 20kHz: attenuation <0.1dB dynamic range ≥ 116dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >14Vp-p
balanced headphone output part performance parameters (4.4mm output, native playback/USB DAC/coaxial decoding, low gain)
Output power 1 L+R≥550mW+550mW(16Ω,THD+N<1%,3.0Vrms) output impedance <0.6 Ω(32 Ω)
Output power 2 L+R≥285mW+285mW(32Ω,THD+N<1%,3.0Vrms) channel separation ≥ 110dB (1kHz @ 32Ω)
Output power 3 L+R≥30mW+30mW(300Ω ,THD+N<1%,3.1Vrms) distortion plus noise 0.00043%(1kHz/-3dB @ 32Ω)
bottom noise <4.8 μV(A-weighted) signal-to-noise ratio ≥ 116dB (A-weighted)
frequency response 20Hz ~ 20kHz: attenuation <0.1dB dynamic range ≥ 113dB
20Hz ~ 85kHz: Attenuation <2dB peak output voltage >8.6Vp-p
Balanced line output part performance parameters (4.4mm output, local playback/USB DAC/coaxial decoding)
distortion plus noise 0.00027%(1kHz/-5dB @ 32Ω) signal-to-noise ratio ≥ 127dB (A-weighted)
channel separation ≥ 107dB bottom noise <1.9uV(A weight)
frequency response 20Hz ~ 20kHz: attenuation <0.2dB dynamic range ≥ 123dB
20Hz ~ 85kHz: Attenuation <2.1dB Line Output Level 4.2Vrms (1kHz@10kΩ)
Audio Format Support
Lossless: DSD:DSD64/128/256/512(".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:768kHz/32bit(MAX)
FLAC:768kHz/32bit(MAX)
WAV:768kHz/32bit(MAX)
WMA LOSSLESS:96kHz/24bit(MAX)
lossy compression: MP3,OGG,WMA,AAC and other formats