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General Specifications
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Name/Model | M23 | Hardware solution | SoC: Snapdragon 660, DAC: AK4191EQ+AK4499EX, Amp: 4-way THX AAA-78+, charging: AW32271 |
Working mode | Android/Pure music/USB DAC/Bluetooth Receiving/AirPlay/Roon Ready | Color | Deep blue/Stainless steel |
Dimensions | About 75.7x136.5x18.1mm | Dimensions | About 299g (Deep blue)/About 392.3g (Stainless steel) |
Display | 5.5-inch bezel-less screen (1440*720 resolution ratio) | Volume control way | Slide or button control |
RAM | 4GB | Internal storage/available space (ROM) | 64GB/about 46GB |
Memory card | Single microSD card expansion, up to 2TB in theory) | Gain mode | Super High (for fast charge)/High/Medium/Low Gain modes |
Channel balance | L20~R20 (0.5dB per level) | Adaptive impedance | PO: 8~150Ω BAL: 8~350Ω |
Buttons and Ports | |||
Buttons | Power button*1; Multifunction button*1;volume touch panel*1; Play/Pause*1; Previous track*1; Next track*1 | Toggle switch | HOLD*1; D.MODE*1 |
Headphone out | 3.5 mm | Line output | 3.5 mm (shared PO) |
BAL headphone out | 4.4 mm | BAL line output | 4.4 mm (shared BAL) |
COAX headphone out | 3.5 mm (shared PO, supports up to 384kHz-24bit/DSD128) | USB | Type-C USB3.0*1 (charging/data transmission)+Type-C POWER IN*1 (Charging/Independent power supply) |
Characteristics | |||
WiFi | 2.4GHz/5GHz, supports multimedia service (DLNA), AirPlay, WiFi song transfer, Roon Ready, etc. | Bluetooth transmission (5.0) | SBC/AAC/aptX/aptX HD/LDAC/LHDC |
Bluetooth reception (5.0) | SBC/AAC/LDAC | FIIO Link | Android supports WiFi and Bluetooth control, iOS supports WiFi control |
MQA | Supports MQA full decoding | All to DSD | Supported |
Double tap to wake up | Supported | In-vehicle mode | Auto on/off following the USB of the vehicle |
Max supported sampling rate | Local decoding: up to 384kHz-32bit/DSD256 | Power off timers | Supports Sleep/Idle power off |
USB DAC: up to 384kHz-32bit/DSD256 | EQ adjustment | 10-band dynamic EQ adjustment (±12dB), built in 8 types of preset EQ, self-define EQ, supports PEQ | |
USB Audio: 768kHz-32bit/DSD512 (supports DoP/D2P/Native) | System navigation mode | Supports gesture navigation, 2-button navigation and 3-button navigation | |
Firmware upgrade | Supports upgrade from local storage/memory card/OTA |
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Power Supply Parameters | |||
Power Supply | Supports QC3.0, QC4.0, PD2.0, PD3.0 PPS fast charge | Battery capacity | 5500mAh |
Charging time | About 2.5 hours (PD3.0 fast charge mode) | Standby time | >1000h |
Battery life and test conditions |
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3.5mm headphone out: 10.5 hours | |||
Volume level | 52 | Gain level | High gain |
Display status | OFF | Playing track and format | MP3 44.1kHz/16bit |
EQ | OFF | Load | 32Ω |
4.4mm BAL headphone out: 9 hours | |||
Volume level | 41 | Gain level | High gain |
Display status | OFF | Playing track and format | MP3 44.1kHz/16bit |
EQ | OFF | Load | 32Ω |
Audio Parameters | |||
Parts of performance and parameters of PO (Super High Gain mode) | |||
Output power | L+R≥480mW+480mW (16Ω , THD+N<1%) | Output impedance | <1Ω |
L+R≥440mW+440mW (32Ω, THD+N<1%) | THD+N & Noise | ≤0.00038% (1kHz/-6dB@32Ω) | |
L+R≥60mW+60mW (300Ω, THD+N<1%) | SNR | ≥125dB (A-weighted) | |
Crosstalk | ≥72dB (1kHz@32Ω) | Noise floor | ≤1.9μV (A-weighted) |
Frequency response | 20Hz~20kHz: damping<0.1dB | Peak output voltage | 12 Vp-p |
20Hz~80kHz: damping<1.1dB |
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Parts of performance and parameters of PO (High gain) | |||
Output power | L+R≥235mW+235mW (16Ω , THD+N<1%) | Output impedance | <1Ω |
L+R≥125mW+125mW (32Ω, THD+N<1%) | THD+N & Noise | ≤0.00046% (1kHz/-4.1dB@32Ω) | |
L+R≥15mW+15mW (300Ω, THD+N<1%) | SNR | ≥120dB (A-weighted) | |
Crosstalk | ≥71dB (1kHz@32Ω) | Noise floor | ≤1.9μV (A-weighted) |
Frequency response | 20Hz~20kHz: damping<0.1dB | Peak output voltage | 6 Vp-p |
20Hz~80kHz: damping<1.1dB |
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Parts of performance and parameters of line-out | |||
THD+N & Noise | ≤0.00043% (1kHz/0dB@10kΩ) | SNR | ≥126dB (A-weighted) |
Crosstalk | ≥110dB (1kHz@10kΩ) | Noise floor | ≤1.1μV (A-weighted) |
Frequency response | 20Hz~20kHz: damping<0.1dB | Line output level | 2.0Vrms |
20Hz~80kHz: damping<1.1dB |
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Parts of performance and parameters of BAL headphone out (Super High Gain mode) | |||
Output power | L+R≥730mW+730mW (16Ω , THD+N<1%) | Output impedance | <2Ω |
L+R≥1000mW+1000mW (32Ω, THD+N<1%) | THD+N & Noise | ≤0.00038% (1kHz/-12dB@32Ω) | |
L+R≥240mW+240mW (300Ω, THD+N<1%) | SNR | ≥125dB (A-weighted) | |
Crosstalk | ≥117dB (1kHz@32Ω) | Noise floor | ≤3.1μV (A-weighted) |
Frequency response | 20Hz~20kHz: damping<0.1dB | Peak output voltage | 23.5 Vp-p |
20Hz~80kHz: damping<1.1dB |
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Parts of performance and parameters of BAL headphone out (High Gain mode) | |||
Output power | L+R≥630mW+630mW (16Ω , THD+N<1%) | Output impedance | <2Ω |
L+R≥475mW+475mW (32Ω, THD+N<1%) | THD+N & Noise | ≤0.00039% (1kHz/-5.7dB@32Ω) | |
L+R≥55mW+55mW (300Ω, THD+N<1%) | SNR | ≥122dB (A-weighted) |
About FiiO Electronics Technology Co., Ltd.
FiiO Electronics Technology Co., Ltd. was established in 2007. It is a high-tech enterprise that combines research, development, production and sales, and its sales are mainly based on its own FiiO brand as opposed to OEM/ODM. It focuses on digital audio, with current mainstay products being portable headphone amplifiers, DAC / amps and portable digital audio players.
FiiO: It is composed of Fi (Fidelity) from HiFi and iO (represents number 1 and 0) which indicates the sincerer feeling and more convenient life the digital tech has brought to us.
飞傲: The Chinese transliteration of FiiO, as well as representing youthful vigor and the active & innovative spirit of the company.
Audio products are meant to fulfill the spiritual pleasure of users.
Customer Service
About products
Research & Development Team
Research & Development Investment
FiiO keeps bringing in advanced equipments and high-tech talents so as to ensure the stable growth and long term competitive edge. Up till now, the team size has expanded three times than that of 2007 when we established.
Team Composition
The R&D team is made up of development dep, engineering dep and QC dep, with 60+engineers in total.
Authorized certifications
FC, CE, KC, CCC and ISO9001:2008 ensure the safety and quality of the products.
Production management
FiiO has strict requirements to production with almost “zero tolerance” even to small problems, which is strictly in compliance with the International Quality Management System ISO9001.
QC Equipment
Customer oriented
Driven by customers’ needs, we innovate constantly and response promptly to the market changes. We develop new products based on customers’ needs and compete for more market shares.
Brand Spirit
the earliest company that designed the minimum volume headphone amplifier. First dockable amp & DAC product. First amp specially designed for iPod/iPhone. First amp with adjustable power supply and power supplied by mobile phone battery. First multifunctional headphone amp & DAC for Android smarphone. First Hi-Res music player at a price lower than 1000RMB supporting 192K music. First Android-based Hi-res music player.
Repair Rate < 1%. Sound Quality Control system. Original components imported from TI, Wolfson, Maxim. Company-wide quality control. +20 quality engineers and inspectors. Complete testing facilities.
CEO at the frontline of customer service. 100% response to enquiries. The most popular headphone amplifier brand on Head-Fi. First class website and contents in the audio industry. Interaction with and support to customers on Facebook and Microblog (twitter-like social website).
Brand Mission
FiiO designs, produces and sells high-quality products at favorable prices to those who love music and style.
Buon DAP
Soddisfatto dal prodotto, anche se ho avuto qualche problema nel trasferire i file musicali sulla microSD da 1 TB non so se dipende dal DAP o dalla scheda, comunque risolto collegando la scheda direttamente al PC. Buono il suono e la capacità di pilotaggio delle cuffie, anche di quelle un po meno sensibili.