FiiO X7 Mark II User Manual

Foreword

Thank you for purchasing FiiO’s X7, our 384kHz /32bit / DSD high resolution lossless music player. To let you better utilize the X7 to enjoy high-quality music, we have prepared this complete user manual and collected and answered some frequently asked questions by users. We hope this manual will help you get to know the X7 and unleash its full potential.

A. Introduction

The X7 is a high fidelity, high resolution digital audio player, running on Android 5.1 and supporting various music formats such as DSD, DXD, WAV, WMA, APE, FLAC, AAC, AIFF, ALAC, Ogg Vorbis, MP3 etc. at up to 384kHz / 32bit. It also features professional capabilities like native DSD decoding, CUE sheets, gapless playback, automatic playback through folders, and graphic equalizers. The X7 also comes with Bluetooth connectivity.

Based on Android, the X7 allows users to choose their preferred Android music player app. It also includes FiiO Music, its native player app, which has been customized based on user habits for a quick and smooth music listening experience. Furthermore, the X7 supports WiFi connection, enabling streaming music for a more enhanced experience.

B. Buttons and Ports Introduced

1. Pictorial Guide to Buttons and Ports

Diagram illustrating the buttons and ports of the FiiO X7 Mark II player, labeling the 3.5mm Line/Coaxial/Optical out, Play/Pause, Volume Knob, Previous/Next track, Indicator light, T5 screw, 3.5mm Headphone port, Touchscreen, Micro SD card slots, T5 screw, AM3A headphone module, 2.5mm TRRS balanced headphone port, and Micro USB port.

Image of the FiiO X7 Mark II digital audio player, showing its front and side profile, with key components labeled.

2. Buttons and Ports Explained

• Touchscreen (16.7 million colors, 480x800 pixels): Displays the user interface and other information; used for operating the unit via screen touches and/or in conjunction with buttons.
• Play / Pause: Press while playing to pause music; press while paused to continue playback.
• Volume knob: Scroll up to increase volume, scroll down to decrease volume.
• Previous / Next track: Press to skip to the previous or next track.
• Indicator light: Indicates player's operating status (lighting effect can be customized in Settings -> Display -> Pulsar light).
• Power / Lock: Hold for 2 seconds to turn on when powered off. When powered on, hold to display power off/reboot menu. Press briefly to turn screen on/off. Press and hold for 15 seconds to reset.
• Micro SD card slot: Dual micro SD card slots, each supporting up to 256GB capacity.
• 3.5mm headphone port: Connect your headphones here. CTIA-spec headsets with in-line remote control are supported for operations like Volume Up/Down, Play/Pause, Next track, and Previous track.
• 2.5mm balanced headphone output: Supports 2.5mm TRRS balanced headphones.
• Micro USB port (11-pin): Used for charging, data transfer, USB DAC function, and connection to FiiO docks. A Quick Charge adapter (DC9/12V 2A) is recommended for charging, allowing full charge within 2 hours. Using a DC5V/2A adapter takes approximately 4 hours.
• 3.5mm line / Coaxial output / Optical output: Shared port for line, coaxial, or optical digital signals. Switch between outputs in X7 Settings -> Sound Settings -> Multifunctional Output.
• T5 screws: Used for removably securing expansion modules.

C. Pure Music / Android Mode Switch

1. Switching from Android to Pure Music mode

While in Android mode, pull down the Quick Settings menu from the top of the touchscreen and tap the "Android Mode" icon. The player will prompt you to confirm the switch. Press OK to enter Pure Music mode, enabling uninterrupted music enjoyment with the built-in FiiO Music app.

Screenshot showing the transition from Android Mode to Pure Music Mode, with a prompt to confirm the switch.

2. Switching from Pure Music to Android mode

While in Pure Music mode, pull down the Quick Settings menu from the top of the touchscreen and tap the "Pure Music Mode" icon. The player will prompt you to confirm the switch. Press OK to enter Android mode, allowing access to third-party Android apps.

Screenshot showing the transition from Pure Music Mode to Android Mode, with a prompt to confirm the switch.

D. Wireless Connectivity

The X7 supports Bluetooth and WiFi, expanding its functionality through wireless connections.

1. Bluetooth

To use the X7 with new Bluetooth devices (e.g., earphones, speakers, remote controls), pair them as follows:

1. Pull down the Quick Settings menu and hold your finger on the Bluetooth icon to open Bluetooth settings.
2. If Bluetooth is off, turn it on using the switch.
3. Tap "SEARCH FOR DEVICES" to find nearby Bluetooth devices.
4. Tap the name of your desired Bluetooth device to pair. Successfully paired devices appear under "PAIRED DEVICES".

Screenshots of the Bluetooth settings menu, showing a device paired and connected.

The X7 will prioritize pairing with the device it was last connected to.

2. WiFi

The X7 supports WiFi 2.4/5G, allowing connection to the internet for music resources or Android functions. It can also stream music to WiFi audio devices.

To connect to WiFi devices/hotspots:

1. Pull down the Quick Settings menu and hold your finger on the Wi-Fi icon to enter Wi-Fi settings.
2. Slide the WiFi switch to ON. The X7 will automatically search for and display available WiFi connections.
3. Tap the name of the desired WiFi network and enter the password if prompted to connect.

Screenshots of the WiFi settings menu, showing available networks and connection status.

When WiFi is on, the X7 will connect to the last connected WiFi network by preference.

E. Firmware Updates

Improper operation during firmware updates may cause the unit to malfunction. Read these instructions carefully before proceeding.

1. Over-the-air automatic updates

1. Turn on the X7's WiFi and connect to a suitable hotspot.
2. The X7 will automatically check for updates and prompt you if a newer firmware version is found.
3. Tap "Yes" to download and install the update.

a) You can tap the home button to dismiss the download screen and continue using the X7.
b) Connect to a high-speed network to save download time.
c) The package download can be stopped and resumed.
d) Do not operate the X7 while the update is ongoing.

The X7 will reboot twice: once in update mode, then back into Android mode. The update process is complete when the Android lockscreen appears.

4) After the update is complete, please delete the update package as prompted.

Screenshots depicting the system update process, including prompts to update and confirmation of success.

2. Local Updates

1. Copy the update zip file provided by FiiO to the internal storage or the SD card inserted into slot 1. (Copying to the root directory is recommended; firmware updates do not affect existing files or music.) Do not rename or extract the zip file.
2. To copy files: Connect the X7 to a computer via USB cable. The "USB connected" screen should appear; tap "Turn on USB storage". If it doesn't appear, pull down the notification panel and tap "USB connected". The X7's storage will appear as a USB drive on the computer. Copy the zip file. Safely eject the drive from the computer.
3. On the X7's Android homescreen, tap "Technical support" -> "Firmware Update". In the file browser, find the downloaded zip file (in internal_sd or external_sd1) and tap it. The system will prompt you to confirm the update.
4. Tap "OK" to start the update. Do not operate the X7 while the update is ongoing.

The X7 will reboot twice, once in update mode, then back into Android mode. The update process is complete when the Android lockscreen appears.

Screenshot of a prompt asking to select a package for upgrade.

3. Over-the-air manual updates

If you canceled an automatic update or want to upgrade later, you can start the upgrade manually:

1. Turn on the X7's WiFi and connect to a suitable hotspot.
2. On the Android desktop, select "Technical support" > "Firmware Update" > "Online Upgrade". Choose the update file; a dialogue will pop up.
3. Click "Check Upgrade". The X7 will check for updates and prompt you if a newer version is found.
4. Tap "Yes" to download and install the update.
5. After completion, delete the update package as prompted.

Screenshot of the 'Online Upgrade' screen within Technical Support.

Notes and Precautions

1. Ensure the X7 is adequately charged (preferably fully charged) for the update process to prevent power failure.
2. If an update fails, check that you selected the correct update zip file.
3. Ensure adequate storage capacity if using internal storage for upgrades (over 1GB recommended).
4. Do not attempt to operate the X7 while the update is ongoing.

E. Pictorial Guide to Operating the X7

1. Android Mode

The Android interface of the X7 is similar to other Android devices, providing an intuitive operating experience.

1) Status bar

The status bar at the top of the screen displays various information on the current status of the X7:

Illustration of the Android status bar with numbered icons representing various device statuses (e.g., WiFi, Bluetooth, USB, battery level, time).

• 1 -- Volume icon
• 2 -- Current volume level
• 3 -- Headphone Amp module
• 4 -- FiiO Music
• 5 -- USB connected
• 6 -- Bluetooth on
• 7 -- Docked connected
• 8 -- Optical connected
• 9 -- Coaxial connected
• 10 -- Lineout connected
• 11/12 -- Headphone connected / Balanced headphone connected
• 13 -- WiFi on
• 14 -- Time
• 15 -- Battery level & Battery icon (charging)

2) Notifications panel

The notifications panel displays system notifications. Pull down from the top status bar to show it. Pull up from the bottom of the panel or tap the back/home buttons to dismiss it.

Screenshot of the notification panel.

3) Quick Settings menu

The Quick Settings menu shows commonly used settings icons. To access it, pull down from the top of the screen to show the notification panel, then pull down the notification panel again. Pull up from the bottom of the menu or tap back/home buttons to dismiss it.

The following quick settings icons are available:

• Settings: Tap to show the full settings menu (useful in Pure Music mode).
• Battery: Shows current battery level. Tap for full battery info.
• Brightness: Tap to show the brightness adjustment slider.
• WiFi: Tap to turn WiFi on/off; hold to show WiFi settings.
• Bluetooth: Tap to turn Bluetooth on/off; hold to show Bluetooth settings.
• Current operation mode (Android / Pure Music mode): Tap to switch modes.
• Line out/Coaxial/Optical out: Click to switch between Line out, Coaxial out, and Optical out.
• Gain: Click to switch between High gain and Low gain.
• Filter Settings: Click to enter Audio Settings, then Lowpass filter mode to choose between 7 filter modes.
• Storage: Click to switch to USB DAC mode. (Download the USB DAC driver from http://www.fiio.net/en/supports and follow instructions.)
• Power-off timers: Click to enter settings for sleep or idle power-off functions.

Screenshot of the Quick Settings menu, displaying various toggles and options.

4) FiiO Market

With the X7 connected to WiFi, tap "FiiO Market" on the Android homescreen to see a list of officially recommended apps tested for compatibility. Slide up and down to view the full list.

Screenshot of the FiiO Market app, showing a grid of recommended music and utility applications.

5) Technical Support

Tap "Technical support" on the Android homescreen to access the technical support menu:

• Firmware update: Manually select an update zip package.
• Quick start guide: View the quick start guide for the X7.
• Contact Us: Access FiiO official platforms and contact information (Internet connection required).
• FiiO's official website: Visit www.fiio.net for the latest news and product info (Internet connection required).
• FiiO Forum: Enter the FiiO forum to interact with other music lovers (Internet connection required).
• FiiO on Head-Fi: Visit the FiiO forum page on Head-Fi (Internet connection required).

Screenshot of the Technical Support menu, listing options like Firmware Update, Quick Start Guide, and Contact Us.

6) X7 Settings

The X7 runs FiiO's customized Android-based OS for optimal audio performance. Some settings differ from standard Android and are explained below.

To enter Settings, tap the cog icon ⚙️ (usually on the lower right of the homescreen) or find it in the app drawer.

a) Audio Settings—In-line remote

Response to in-line remotes on connected headsets can be enabled or disabled.

Screenshot showing the 'In-line Remote' option in Audio Settings.

b) Audio settings—Adjustable volume at LO

This setting allows you to control whether the volume through Line Out can be adjusted by the device's volume level.

Screenshot showing the 'Adjustable volume at LO' option in Audio Settings.

c) Audio settings—Lowpass filter mode

Choose from filter modes: Fast Roll Off Linear Phase, Slow Roll Off Linear Phase, Apodizing Fast Roll off, Fast Roll Off Minimum Phase, Slow Roll Off Minimum Phase, Hybrid Fast Roll Off, Brickwall.

Screenshot showing the Lowpass filter mode selection screen.

d) Audio settings—Multifunctional Output

The 3.5mm output port can output analog line signal or coaxial/optical digital signals. Choose among these options.

Screenshot showing the Multifunctional Output selection screen.

e) Audio settings—SPDIF out setting

Two modes are available for SPDIF Out: D2P (DSD to PCM) and DoP (DSD over PCM).

• D2P mode: Plays PCM signal as is. When playing DSD signal, it converts DSD to PCM.
• DoP mode: PCM signal can be outputted directly, as can DSD signal. The connected coaxial device must support DSD. It supports up to DSD64; DSD128 is not supported.

Screenshot showing the SPDIF out (DOP/D2P) selection screen.

f) Audio settings—Gain

Sets the gain level for headphone output to High (high volume) or Low (low volume).

Screenshot showing the Gain selection screen (High/Low).

g) Audio settings—Channel balance

Sets the volume balance between left and right channels, from leftmost (L10) through centered (0) to rightmost (R10), with 21 settings available.

Screenshot showing the Channel balance slider.

h) Display—Brightness level

Set the screen brightness to a comfortable level based on the environment.

Screenshot showing the Brightness level setting.

i) Display—Wallpaper

Set the wallpaper to your preference.

Screenshot showing wallpaper selection options.

j) Display—Pulsar light

Customize the lighting of the pulsar light (blue horizontal light below the touchscreen and FiiO logo). Brightness can be adjusted in 256 steps. The light can be set to steady (Lit), pulsing, or off.

Screenshots showing Pulsar light settings for Charging and Working states.

k) Display—Sleep

Specify the inactivity time after which the X7 enters sleep mode. In sleep mode, power consumption is low. Short press the Power button to wake up the X7.

Screenshot showing Sleep timer options (e.g., 1 minute, 2 minutes).

l) Display—Font Size

Choose the font size at your personal preference.

Screenshot showing Font size options (Normal/Large).

m) Powertimer—Sleep

"Sleep" can turn off the X7 after a set time, regardless of activity, useful for bedside listening. The sleep timer can be set from 0 (OFF) to 120 minutes.

Screenshot showing the Sleep timer setting.

n) Powertimer—Idle poweroff

Idle poweroff turns off the X7 after a period of detected inactivity. The timer can be set from 0 (OFF) to 50 minutes.

Screenshot showing the Idle poweroff timer setting.

2. FiiO Music App

The X7 includes the FiiO Music app, a highly customized music player designed to leverage the X7's audio hardware and cater to advanced music enthusiasts.

1) App homepage

On first launch, a pictorial guide appears. This guide can be recalled via Settings (cog icon ⚙️) -> Help.

On first launch, you'll be prompted to scan for music. Tap "Scan all" or "Scan selected folder(s)".

The app homepage offers the following functions:

• Random track: Tap the album art window to play a random song. Slide left/right on the window to change tracks.
• Shortcut to Now Playing: Tap the music note button ? to jump to the Now Playing screen.
• Settings: Tap the cog icon ⚙️ to access app settings.
• Search: Tap the magnifying glass icon ? to search for songs.
• Play playlists: Tap the list icon ☰ to browse playlists (Favorites, user-defined). M3U playlists are found via file browsing.
• Local music: Tap the folder icon ? to browse music stored locally (internal storage and micro SD card).
• DLNA: Tap the DLNA symbol ? to connect to DLNA-enabled networks.
• Recently played: Lists recently played songs.
• Most played: Lists most popular songs.
• Recently added: Lists newly added tracks.

Screenshots of the FiiO Music app homepage, with annotations for various functions.

Playlists, local music, DLNA, recently played, and most played can be selected/unselected and customized in Settings -> UI Personalization.

2) Local music

The "Local music" screen displays songs in 5 listings:

• Songs: All songs in one list, sortable by folder tracks or alphabetically.
• Artists: Displays artists, sortable by track count or name. Tap an artist to see their songs, or tap next to the name to see albums. Tap an album to see tracks. Tap a track to play.
• Albums: Displays all albums, sortable by track count or name.
• Genre: Displays all genres, sortable by track count or name. Tap a genre to view its songs.
• Folder view: A folder browser showing directories on internal storage and micro SD card, displaying only playable music files.

Note: Tap the "..." icon for more options like sorting or editing lists.

Sliding right over a list item reveals four options:

• Add to favorites: Add to the Favorites playlist.
• Add to playlist: Add to a chosen playlist.
• Play over Bluetooth: Play via Bluetooth.
• Track Info: Shows details like ID3 tag, song length, bitrate.

Screenshot of the FiiO Music app local music listing.

a) Alphabet scrolling

When lists are alphabetized, slide over the alphabet list to quickly jump to a specific letter.

b) Gestures

Slide right over a list item for shortcuts (Add to Favorites, Add to Playlist, Bluetooth, Track Info). Slide left over a list item to reveal a delete option. Tap the red button to confirm deletion.

Screenshot of the FiiO Music app gestures for list items.

c) More functions menu at the lower right

Tap the "More functions" menu (⋮) for options like sorting order and batch operations. Batch operations allow selecting multiple items (via checkboxes) for actions like play, add to favorites, or add to playlist.

3) Now playing

The Now Playing screen features buttons and gesture controls:

• Home ?: Return to App homepage.
• Search ?: Fullscreen search for tracks, albums, or artists. Recent searches are saved.
• Equalizer ?️: Open the equalizer control panel.
• Play via Bluetooth: Toggle Bluetooth playback. Opens pairing screen if no devices are connected.
• Add to Favorites ❤️: Add the current track to Favorites.
• Add to playlist: Add the current song to a playlist.
• Delete track ❌: Show a confirmation message for deleting the current track.
• Track info: View track details.
• Play mode: Choose between Play All once, Loop Single, Shuffle, and Loop All. (Can be changed to EQ or Favorites via "Shortcut display" setting.)
• Previous track ◀️◀️
• Play / Pause ▶️/⏸️: Play or pause the current track.
• Next track ▶️▶️
• More functions ...
• Close More functions

Screenshots of the Now Playing screen, showing buttons and gesture controls.

b) Gesture operations

• Slide left/right on album art to change tracks.
• Click album art to switch between album cover, lyrics, ID3 info, and VU meter.
• View playlist: Slide in from the left edge. Tap a song to jump to it. Tap outside the playlist to close it.
• Adjust volume: Slide up/down on the right edge of the album art area.
• Fast forward/rewind: Tap anywhere on the progress bar.

While viewing lyrics, you can adjust playback progress, timeline, or font size.

4) EQ Equalizer

FiiO Music offers a graphic equalizer. Choose genre presets or adjust ten frequency bands (-6dB to +6 dB) from 31Hz to 16kHz for personalized listening.

• EQ switch: Activate the equalizer using the lever.
• Choose preset EQ: Swipe up from the bottom to show presets (Pop, User Defined, Rock, Dance, Blues, Metal, Vocal, Classical).
• Customize EQ: Turn on equalizer, choose a preset, drag sliders to adjust frequencies. Swipe left/right to move between sliders. Press Back to save.
• Reset EQ: Tap the reset button ? to revert to the genre default.

A factory reset will restore all EQ settings to defaults.

Screenshot of the EQ settings interface.

3. Pure Music Mode

Operation in Pure Music mode is similar to Android mode, but the X7 runs only FiiO Music. Background Android processes are disabled for a smoother experience.

To switch to Android mode, pull down the Quick Settings menu and tap the "Pure Music Mode" icon.

F. FAQ

1. Charging

How large is the X7's battery? How long will it last?

The X7 has a 3800mAh rechargeable Li-poly battery, providing roughly 10 hours of play time in normal use. Refer to http://fiio.net/en/products/71/parameters for Battery Life Test Conditions.

How may the X7 be charged?

The X7 uses a micro USB port and is compatible with all USB power sources:

1. Supports normal and quick charge. A quick charge adapter (DC9/1.5A, 12V/2A) is recommended for a full charge within 2 hours.
2. Connecting to a computer USB port will take longer due to lower current limits.
3. Mobile USB power banks (DC5V output, 1A or above recommended) can also be used.

How long does it take to fully charge the X7?

With a quick charge adapter (DC9/1.5A, 12V/2A), it takes about 2 hours. With a DC5V/2A adapter, it takes about 4 hours.

Can X7 be used while charging?

Yes, the X7 has a high-quality power management circuit. It can be used while charging without performance degradation. The device may become somewhat warm during charging and playing, which is normal. Charging time will be slightly longer as some current is diverted to power the device.

Does the X7 display accurate battery levels?

Yes, the X7 includes a coulomb meter for accurate battery readouts.

What to do if the X7 gets hot while charging and playing at the same time?

The X7 can be charged and used simultaneously without harm. If concerned, you may turn off the X7 for charging.

2. Transferring songs

What operating systems does the X7 support?

Supports Windows XP, Windows 7, 8, and 10 (x86 and x64). Also supports Apple Mac OS. Linux is generally supported, but full compatibility is not guaranteed.

What USB ports is the X7 compatible with?

The X7 is a USB 2.0 device, compatible with USB 2.0 ports, including USB 3.0 and USB-C (via adapter cables).

What are the transfer rates of the X7?

Transfer rates depend on data format and SD card. Using a Sandisk Class 10 SD card (experimental data):

• Internal memory: writes 11MB/s, reads 26MB/s (approx.)
• Micro SD card 1: writes 6MB/s, reads 26MB/s (approx.)
• Micro SD card 2: writes 12MB/s, reads 23MB/s (approx.)

The X7 is connected to my computer. Now how to transfer songs from the computer to the X7?

Drag and drop music folders from your computer to the X7, which appears as a regular removable USB drive. You can also use music library management programs that support connected USB drives.

Is driver installation required for transferring songs?

No.

3. Firmware updates

How to tell whether the X7 has the latest firmware?

The X7 automatically checks for the latest firmware online when connected to WiFi. You can also manually check the firmware version in Android Settings -> About X7 -> Build number and compare it with versions listed at http://fiio.net/en/supports/45. Pay attention to FiiO news at www.fiio.net or community news at www.head-fi.org/f/180/fiio or www.fiio.me.

Would the X7 be bricked if update fails? What to do if the X7 is bricked?

Ensure the X7 is well-charged before updating. The X7 should not brick even if an update fails. If it does, contact FiiO support at support@fiio.net.

4. Storage

Does the X7 contain internal storage? Is removable storage supported?

The X7 has 64GB of internal storage and supports two micro SD cards, each up to 256GB (total 512GB).

Is the X7 picky about cards?

The X7 supports all major SD card brands. For high-bitrate files (e.g., 384kHz/24bit APEs, DSD128) without dropouts, cards of Class 10 or above are recommended.

5. Playing music

Why can my APE files not be played by the X7?

APE files have 5 compression rates: Fast, Normal, High, Extra High, and Insane. The X7 supports Fast, Normal, and High compression APEs up to 384kHz/24bit, and Extra High and Insane APEs up to 192kHz/24bit. Check the track's compression rate.

Does the X7 support CUE sheets?

Yes, external CUE sheets are supported for identifying and playing CUE'd music files as separate tracks. Embedded CUE sheets are not supported. Ensure the .cue file is named the same as the music file it cues.

Why does X7 not show the cue file in the micro SD card when browsing files?

The X7 may have already split the CUE'd file into multiple tracks, which are then displayed.

How to listen to all the music folders on the X7 one by one without switching Folders/Artist/Album/Genre manually?

In FiiO Music, go to "Settings" -> "Play through folders" and enable it. This will automatically skip from the last song in one folder/artist/album/genre to the first song in the next.

Why do the songs I've copied into the X7 not appear in any listing (except Folder view) in FiiO Music?

Go to FiiO Music Settings -> "Scan for songs" to index your music.

6. Connecting with other audio equipment

How to connect the X7 Line Out to other equipment? What to connect it to?

Ensure the Multifunctional Output is set to Line Out. Connect the LINE/COAX/OPT OUT port on top of the X7 to the line-in/aux-in port of your equipment using an appropriate cable. The Line Out is a high-level output suitable for headphone amplifiers, AV receivers, loudspeaker preamps, and powered speakers. The default output level is high (2V) and can damage headphones. Headphones are not designed for line output and will perform poorly.

Could X7 be used with FiiO's docking station?

Yes, the X7 can be used with FiiO's docking station DK1 and desktop amplifier K5 via Micro USB connection.

The X7 does not get detected by my computer for file transfers?

Connect the X7 via USB. Pull down the settings menu and ensure the USB connection is set to "storage" (not "DAC"). Then reconnect. You may be prompted to "Turn on USB storage". This prompt can also be accessed by pulling down the notification panel and tapping "USB connected".

How to connect the X7's Coaxial/Optical digital output to other equipment? What to connect it to?

Ensure Multifunctional Output is set to Coaxial or Optical digital out. Connect the LINE/COAX/OPT OUT port to the provided S/PDIF adapter cable, then connect the cable to your equipment's Coaxial or Optical input using an appropriate RCA coaxial or Optical cable.

Different manufacturers may have different pin-out definitions for coaxial plugs. Use the supplied cable to avoid incompatibility issues.

Why does my HT receiver never play the first ten seconds of music from my X7?

If the HT receiver is not explicitly set to receive audio from the coaxial port, it may take about ten seconds to detect audio and switch from HDMI. Set your HT receiver's audio input to Coaxial.

7. Other operations

How to get longer battery life for the X7?

1. Set the display to sleep after inactivity (System Settings -> Display -> Sleep). Lock the screen before pocketing the X7 to prevent accidental touches.
2. Lower backlight brightness and turn off the pulsar light.
3. Configure Idle poweroff in System Settings -> Powertimer to automatically power off the X7 after a set period of inactivity.

Why is the X7 a bit sluggish in responding at times?

High-bitrate tracks (e.g., 384k/24bit APEs or DSD files) require more processing power, potentially causing UI slowdowns. Consider converting APEs to FLACs or WAVs. Large numbers of songs on the micro SD card, non-music files (photos, videos), or playing high-bitrate files from slow SD cards can also cause delays or stuttering. Class 10 or above SD cards are recommended. Disordered files (e.g., mixed APE albums and CUE files in one folder) can slow loading; organize files by artist, then album. Storing different formats in separate folders can also improve performance.

Why does the X7 get a little hot in operation?

The X7 uses a high-clock-speed SoC, separate DAC, and a high-power headphone amplifier, dissipating more power than typical DAPs. This power dissipation generates heat, causing the unit to warm up slightly, which is normal and not a safety concern.

Why can't I go to the homescreen by pressing the home button?

Check the current operation mode. If in Pure Music mode, pull down the settings menu and tap the mode icon to switch to Android mode. You can then access the Android homescreen. Pulling down from the upper right of the screen twice enables the Quick Settings menu and shows the current system mode.

Why can't I see the Quick settings menu when I pull down from the top of the touchscreen?

There are two levels of pull-down menus. The first shows the notification panel; the second shows the Quick Settings menu.

Does the X7 support 256GB micro SD cards?

Yes.

Does the X7 coaxial digital output support DoP? At what rate?

Yes, DoP output is supported up to 2.8MHz/1bit (DSD64).

Why can my X7 not receive OTA updates / why is the OTA update so slow?

Update download speed can be affected by network constraints (FiiO server, intermediary network, ISP, WiFi router) or poor WiFi reception. You can press the Home button to dismiss the progress bar and continue using the X7 normally while the update downloads. The download will continue even if the X7 is turned off and on.

Why sometimes it shows "0 new songs added to media library" after updating?

The X7 uses an incremental update method. If songs were already added to the library, they won't be added again, resulting in "0 new songs added". This is not an update failure; it allows the "Newly added" function to work and saves scanning time.