Name/Model M17 M11 Plus LTD M15
CPU model Snapdragon 660 14nm Snapdragon 660 14nm Exynos 7872 14nm
CPU frequency 8*Kyro260(2.2GHz) 8*Kyro260(2.2GHz) 2GHz(A73×2),1.6GHz(A53×4)
Number of CPU cores 8 8 6
DAC ES9038PRO×2 AK4497EQ×2 AK4499EQ×2
Operating system Highly customized Android system Highly customized Android system AK4499EQ×2
Touchscreen Ten-Point Touchscreen Ten-Point Touchscreen Ten-Point Touchscreen
Keyboard type virtual QWERTY keyboard virtual QWERTY keyboard virtual QWERTY keyboard
Special features Coaxial input mode/ DC and battery dual power supply system/ knob and button dual volume control mode/ 2.5+3.5+4.4+6.35+RCA coaxial port/ dual Type C port/global no SRC/ global All to DSD MQA 8x renderer/ customizable multi-function buttons/ global no SRC/ global All to DSD/ 2.5+3.5+4.4 output/ full-screen gesture operation Full format Bluetooth reception/ analog potentiometer volume knob/ MQA 8x renderer/ Corning Gorilla Glass/ customizable multi-function buttons/ global no SRC/ global All to DSD/ 2.5+3.5+4.4 output/ full screen gesture operation
User Interface Android mode/Pure sound mode/USB decoding mode/Bluetooth receiving mode/Coaxial decoding mode/AirPlay mode Android mode/Pure sound mode/USB decoding mode/Bluetooth receiving mode/AirPlay mode Android mode/Pure sound mode/USB decoding mode/Bluetooth receiving mode
Hardware solution CPU: Snapdragon 660 
DAC: ES9038PRO*2
AMP: THX AAA-788+*2
BT: QCC5124/
USB: XMOS XUF208
XTAL: NDK femtosecond xtal*2
CPU: Snapdragon 660 
DAC: AK4497EQ*2
AMP: THX AAA-78*2
XTAL: NDK femtosecond xtal*2
CPU: Exynos 7872
DAC: AK4499EQ*2
AMP: OPA2211*2+OPA1622*4+OPA1612*4
BT: CSR8675
USB: XMOS XUF208/
XTAL: NDK femtosecond xtal*2
FPGA: A3P030
Bluetooth transmitter chip: WCN3990/ BT5.0 Bluetooth transmitter chip: WCN3990/ BT5.0 Bluetooth transmitter chip: SAMSUNG S5N5C10B01-6330
WiFi 2.4G/5G/ supports WiFi music transfer 2.4G/5G/ supports WiFi music transfer 2.4G/5G/ supports WiFi music transfer
Bluetooth version 5 5 4.2
Bluetooth transmission format SBC、AAC、aptX、aptX LL、aptX HD、aptX Adaptive、LDAC SBC、AAC、aptX、aptX HD,LDAC LDAC/HWA/aptX/aptX HD/SBC
Bluetooth receiver version 5 5 5
Bluetooth receiving format SBC、AAC、aptX、aptX HD,LDAC SBC、AAC、LDAC SBC/AAC/aptX/aptX LL/aptX HD/LDAC
DLNA supports to access to PC/NAS (upnp protocol) supports to access to PC/NAS (upnp protocol) supports to access to PC/NAS (upnp protocol)
USB Type-C bidirectional USB3.0 TYPE C Bidirectional USB3.0 TYPE C Bidirectional USB2.0
AirPlay Yes Yes Yes
FiiO Link Yes Yes Yes
All to DSD Yes Yes Yes
MQA Yes Yes Yes
Three finger pull-down screenshot Yes Yes Yes
Screen size 5.99 inches 5.5 inches 5.15 inches
Screen type IPS high-definition full-fit incell display IPS high-definition full-fit display IPS high-definition full-fit incell display
Resolution 1080×2160 1440×720 1440×720
RAM 4GB 4GB 3GB
Storage expansion type Micro SD (TF card) Micro SD (TF card) Micro SD (TF card)
Maximum support expansion single TF card/theoretically support up to 2TB expansion single TF card/theoretically support up to 2TB expansion single TF card/theoretically support up to 2TB expansion
ROM 64GB 64GB 64GB
ROM available to user About 46GB About 46GB About 52GB
Button Physical key + analog potentiometer volume knob + volume button + multi-function key + HOLD switch + DC/BAT switch + touch screen Physical key + volume touch and button all-in-one panel + HOLD switch + touch screen Physical key + analog potentiometer volume knob + HOLD switch + touch screen
Headphone output ports(PO) 3.5 mm +2.5mm +4.4mm +6.35mm 3.5 mm +2.5mm +4.4mm 3.5 mm +2.5mm +4.4mm
Analog audio output ports(LO) 3.5 mm socket (shared with PO port) 3.5 mm socket (shared with PO port) 3.5 mm socket (shared with PO port)
Multi-function keys Add to favorites/play next song randomly/play pause/delete currently playing song/switch filter/ equalizer/enter USB DAC mode/ Bluetooth receiving mode/no function Add to favorites/play next song randomly/play pause/delete currently playing song/switch filter/ equalizer/enter USB DAC mode/ Bluetooth receiving mode/no function One key to add to favorites/ one key to randomize the next song/ one key to delete the currently playing song/ one key to switch to USB decoding mode/ one key to switch to Bluetooth receiving mode/ etc.
USB Two-way Type-C USB3.0 (charging/data transfer)/ USB HOST Type-C USB2.0 Two-way TYPE C USB3.0 (charging/data transmission) Two-way TYPE C USB2.1 (charging/data transmission/USB DAC/USB Audio)
SPDIF output 3.5 mm socket (shared with PO port) 3.5mm socket (shared with PO port)/ DSD64/128/ 384kHz/32bit/ DoP/D2P 3.5mm socket(shared with PO port),DSD64/128,384kHz/32bit,DoP/D3P
Color black Black/ stainless steel black
Size 156.4*88.5*28mm 136.6*75.7*17.6mm 134*75*18mm
Weight About 610g About 310g (black)/405g (stainless steel) About307g
Volume control type Potentiometer knob or button control Slide or key control Analog volume knob control
Recommended headphone impedance 16~600Ω 16~150Ω (3.5mm headphone output) 16~600Ω
16~300Ω (2.5mm+4.4mm balanced headphone output)
EQ adjustment 10-band dynamic EQ adjustment (±12dB)/ built-in 8 preset EQ/ custom EQ 10-band dynamic EQ adjustment (±12dB)/ built-in 8 preset EQ/ custom EQ 10-band dynamic EQ adjustment (±12dB)/ built-in 10 preset EQ
Gain selection L/M/H/over-ear headphone mode/Enhanced over-ear headphone mode (when connected to DC) L/M/H L/H
Over-ear headphone mode Yes N/A Yes
L/R channel balance adjustment Plus or minus 5dB L20~R20 (0.5dB per level) Plus or minus 5dB
USB DAC 192kHz-24bit/DSD64 384kHz/32bit|DSD128 768kHz/32bit|DSD512
USB Audio 384kHz-24bit/DSD128 768kHz-32bit/DSD512(DoP/D2P/Native) 768kHz-32bit/DSD512 DoP/D2P/Native
Power supply QC3.0/ QC4.0 and PD2.0 and PD3.0 fast charge/ POWER IN DC 12V QC4.0 and PD2.0 fast charge It is recommended to use QC2.0 (DC12V 1.5A) or above charging
Charging display The large icon in the off state displays real-time charging/ and the upper right corner of the on state displays the real-time battery level and battery percentage The large icon in the off state displays real-time charging/ and the upper right corner of the on state displays the real-time battery level and battery percentage The large icon in the off state displays real-time charging/ and the upper right corner of the on state displays the real-time battery level and battery percentage
Power display (real-time power) can display the percentage (real-time power) can display the percentage (real-time power) can display the percentage
Battery capacity 9200mAh 3.8V high voltage fast charge lithium ion polymer battery 6000mAh 3.8V high voltage fast charge lithium ion polymer 7490mAh 3.8V high voltage fast charge lithium ion polymer battery
Charging time <4.5h (QC fast charge) <3h (QC4.0 fast charge mode) <3.5h (DC 12V/1.6A charging)
Deep standby time 42days 41days 75days
Battery Life & Test Conditions 1 >10 hours (3.5mm headphone output) >11.5 hours (3.5mm headphone output) >15 hours (3.5mm headphone output)
Screen status Off Off Off
EQ Off Off Off
Load 32Ω 32Ω 27Ω
Play track and format MP3 44.1kHz/16bit MP3 44.1kHz/16bit MP3 44.1kHz/17bit
Battery Life & Test Conditions 2 >8 hours (2.5mm+4.4mm balanced output) >10 hours (2.5mm+4.4mm balanced output) >9 hours (2.5mm headphone output)
volume 65 37 50
Screen status Off Off Off
EQ Off Off Off
Load 32Ω 32Ω 27Ω
Play track and format MP3 44.1kHz/16bit MP3 44.1kHz/16bit MP3 44.1kHz/16bit
Software upgrade Local storage upgrade + TF card local upgrade + OTA push upgrade Local storage upgrade + TF card local upgrade + OTA push upgrade TF card local upgrade/OTA push upgrade
Clock function Yes Yes Yes
Font size setting Yes Yes Yes
Third party APP Factory built-in: FiiO Music/ ES file browser/ Chrome browser
Unlimited, free to install third-party apps
Factory built-in: FiiO Music/ File Geek/ Chrome browser
Unlimited, free to install third-party apps
Factory built-in: FiiO Music/ ES file browser/ Chrome browser
Unlimited, free to install third-party apps
Line out performance parameters(LO output)
THD+N ≤0.0006%(1kHz/10kΩ) <0.00079%(1kHz/10kΩ) <0.0004%(1kHz/10kΩ)
Frequency response  5Hz~80kHz(-3dB) 5Hz~90kHz(-5dB) 20Hz~90kHz(-4dB)
Crosstalk  ≥103dB(1kHz/10kΩ) >105dB(1kHz/10kΩ) >107dB
SNR ≥120dB >121dB ≥121dB (dBA)
Noise floor ≤2μV <1.7μV <1.9μV
Line output level  1.9V 2V 2.1V
Headphone output performance parameter 1 (3.5mm headphone output)
Output power 1  ≥740mW(over-ear headphone mode/16Ω / THD+N<1%) ≥295mW(16Ω / THD+N<1%) ≥285mW(16Ω / THD+N<1%)
≥1.4W(Enhanced over-ear headphone mode/16Ω / THD+N<1%) ≥405mW(over-ear headphone mode/16Ω / THD+N<1%)
Output power 2  ≥500mW(over-ear headphone mode/32Ω /THD+N<1%) ≥206mW(32Ω /THD+N<1%) ≥215mW(32Ω /THD+N<1%)
 ≥1.1mW(Enhanced over-ear headphone mode/32Ω /THD+N<1%) ≥490mW(over-ear headphone mode/32Ω /THD+N<1%)
Output power3 ≥63mW(over-ear headphone mode300Ω / THD+N<1%) ≥23mW(300Ω / THD+N<1%) ≥31mW(300Ω / THD+N<1%)
≥126mW(Enhanced over-ear headphone mode/300Ω / THD+N<1%) ≥70mW(over-ear headphone mode/300Ω / THD+N<1%)
Frequency response 5Hz~80kHz(-3dB) 20Hz~80 kHz(-3dB) 20Hz~90kHz(-4dB)
SNR ≥122dB(dBA) ≥120dB ≥121dB(dBA)
≥119dB(over-ear headphone mode/A计权)
Output impedance ≤1Ω ≤1Ω ≤1.4Ω
THD+N ≤0.0007%(1kHz/32Ω) <0.0006%(1kHz/32Ω) <0.0005%(1kHz/32Ω)

CROSSTALK

 ≥75dB(1kHz/32Ω) ≥76dB(1kHz/32Ω) >77dB(1kHz/32Ω)
>115dB(no load)
Noise floor  ≤3.5μV <2μV <2.1μV
<3μV(over-ear headphone mode)
Headphone output performance parameter 2 (2.5mm headphone output)
Output power 1 ≥1.5W(over-ear headphone mode/16Ω / THD+N<1%) ≥500mW(16Ω / THD+N<1%) ≥420mW(16Ω / THD+N<1%)
≥1.5W(Enhanced over-ear headphone mode/16Ω / THD+N<1%) ≥370mW(over-ear headphone mode/16Ω / THD+N<1%)
Output power 2 ≥1.5W(over-ear headphone mode/32Ω /THD+N<1%) ≥588mW(4.3V)(32Ω /THD+N<1%) ≥635mW(4.2V)(32Ω /THD+N<1%)
 ≥3W(Enhanced over-ear headphone mode/32Ω /THD+N<1%) ≥800mW(over-ear headphone mode/16Ω / THD+N<1%)
Output power 3 ≥250mW(over-ear headphone mode/300Ω /THD+N<1%) ≥88mW(300Ω /THD+N<1%) ≥120mW(300Ω /THD+N<1%)
≥500mW(Enhanced over-ear headphone mode/300Ω /THD+N<1%) ≥280mW(over-ear headphone mode/16Ω / THD+N<1%)
Frequency response  5Hz~80kHz(-3dB) 20Hz~92kHz(-5dB) 20Hz~90kHz(-4dB)
SNR  ≥123dB ≥120.5dB ≥122dB(dBA)
≥118dB(over-ear headphone mode/A计权)
Output impedance ≤2Ω <2Ω ≤3Ω
THD+N ≤0.0007%(1kHz/32Ω) <0.00146%(1kHz/32Ω) <0.0006%(over-ear headphone mode/1kHz/300Ω)
CROSSTALK  ≥108dB(1kHz/32Ω) ≥111dB(1kHz/32Ω) >103dB(1kHz/33Ω)
>118dB(no load)
Noise floor  ≤7μV <3μV <3.8μV
<5.2μV(over-ear headphone mode)
Audio format support
Lossless DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),DST iSO DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),DST iSO DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),dst
DXD:352.8kHz/24bit DXD:352.8K/24bit DXD:352.9K
APE FAST/High/Normal:384kHz/24bit(MAX) APE FAST/High/Normal:384kHz/24bit(MAX) APE FAST/High/Normal:384kHz/25bit(MAX)
APE Extra High:192kHz/24bit(MAX) APE Extra High:192kHz/24bit(MAX) APE Extra High:192kHz/25bit(MAX)
APE Insane:96kHz/24bit(MAX) APE Insane:96kHz/24bit(MAX) APE Insane:96kHz/25bit(MAX)
Apple Lossless:384kHz/32bit(MAX) Apple Lossless:384kHz/32bit(MAX) Apple Lossless:384kHz/33bit(MAX)
AIFF:384kHz/32bit(MAX) FLAC:384kHz/32bit(MAX) Apple Lossless:384kHz/33bit(MAX)
FLAC:384kHz/32bit(MAX) WAV:384kHz/32bit(MAX) FLAC:384kHz/33bit(MAX)
WAV:384kHz/32bit(MAX) WMA LOSSLESS:96kHz/24bit(MAX) WAV:384kHz/33bit(MAX)
WMA LOSSLESS:96kHz/24bit(MAX)   WMA LOSSLESS:96kHz/25bit(MAX)
Lossy compression MP3,OGG,WMA,AAC etc. MP3,OGG,WMA,AAC etc. MP4,OGG,WMA,AAC etc.