4. Instruction of the K15 display, knobs, and menu setting
[Display]
Working mode:
left slide at any position, switch to working mode interface; right slide at any position of working mode interface to exit working mode interface.
Menu interface:
right slide at any position to switch to menu settings interface;left slide at any position in the menu settings interface to exit the menu interface.
In menu setting interface, click the back icon to return to the previous page, click the main interface icon to return to the main interface.
Main interface style:
slide up and down to switch between different main interface styles, VU meter is only valid for local playback and streaming mode.
[Menu knob with button]
Rotate to switch the working mode, short press can take effect immediately, or wait for 2 seconds to take effect automatically.
[Volume knob with button]
Rotate to adjust the volume: turn clockwise to adjust the volume up, counterclockwise to adjust the volume down; Short press to control the screen on/off.
After rotating the volume knob, the display will pop up the volume adjustment interface, you can also adjust to the desired volume by dragging the volume bar on the interface.
[Power on/off selector switch]
Switch the K15on/off, turning counterclockwise to the OFF position to power the K15off; turning clockwise to the ON position power K15on.
[Analog output selector switch]
LO: Output is switched to the rear panel, the volume knob can not adjust the volume. At this time the front panel headphone ports have no output.
PRE: Output is switched to the rear panel, the volume knob can adjust the volume. At this time the front panel headphone port have no output.
PO:Output is switched to the front panel, the volume knob can adjust the volume.At this time the rear panel interface have no output.Please switch to the [PO] when connecting headphones to K15.
PO+PRE : Both the front and rear panels have outputs at the same time, and the volume knob can adjust the volume.
[Gain selector switch]
Five types of gain can be set: Low, Medium, High, Super High and Ultra High.
1.Gain switch: Ultra High,Super High,High, Medium and Low corresponding to the gain of 15dB/12dB/0dB/-3dB/-9dB.
2.Gain is invalid under PRE or LO output.
3.When using gain L/M/H, the internal hardware circuit amplification is low, the headphone output noise floor is lower, suitable for high sensitivity headphones; When using gain SH or UH, the hardware circuit amplification is higher, suitable for high-resistance or over-ear headphones
[Menu Setting Instructions]
Playback settings
1.Set play mode: you can choose sequential, loop play, shuffle play, single play, single loop modes.
2.Set resume mode: you can select resume last position, resume last song and turn off resume mode.
Equalizer
Bypass, Jazz, Rock, R&B, Hip-Hop, Pop, Dance, Classical,Retro,De-essing1,De-essing2, and 10 customized equalizers for a total of 21 equalizer effects.
Filters
K15 has original 6 filters of the DAC chip. You could choose the filter according to your listening preferences.
Here are some introductions to some filters, for reference only. These are only for reference since actual listening also has something to do with the matched device.
Sharp Roll-Off Filter: full and rich sounds, positioned at the very rear. It is suitable for pop music.
Short Delay Sharp Roll-Off Filter: robust, thick and atmospheric sounds, positioned at the rear. With accurate sound positioning and enough sound thickness, it is suitable for pop music.
Low Dispersion Short Delay Filter: neutral sounds, positioned near the middle. It is a traditional filter that can match different music styles. If you have no idea about the filter, you can choose this one.
Slow Roll-Off Filter: coherent and clear sounds, positioned near the middle. It is suitable for classical music.
Short Delay Slow Roll-Off Filter: ultimately untouched sounds, positioned near the front. It can create an immersive music environment with clear and uncontrolled sounds, which is suitable for classical music.
Super Slow Roll-Off Filter: soft sounds, positioned at the very front. It is fast with relatively clean sounds.
Max volume
Self-defined from 20 to 100 levels (can not be customized to volume 0 in order to prevent misuse , leading to users thinking that the machine is malfunctioning.)
Balance
Channel balancing means, by adjusting the output amplitude of the left channel, or the right channel individually, to build a special condition suitable for the user's hearing. For people who have no difference in hearing between left and right ears, there is no need to use this function; the output of the left and right channels of the device is already balanced.
The channel balance value is 0 by default, and the left and right channels can be adjusted by 20 steps each, with a fixed difference of about 0.5dB per step;
Network
Select wired or wireless network
Brightness
You can customize the screen backlight brightness, there are 1-5 levels
Screen time
When the screen is inactive for the set time, the display will turn off automatically. Adjustable 15 seconds to 30 minutes and always on options.
RGB lights
Set menu and volume knob indicator’s status. You can set the constant or breathing state.
Light color:you can set the cycle of gradient. The colors orange, red, blue, cyan blue, purple, yellow, white, green could be selected.
Brightness: 5 levels adjustable.
Theme
Interface style theme selection
Idle time
When K15 is not in working condition (e.g. stop playing) and reaches the set time, the background will turn off part of the circuit power supply to minimize heat generation and save power. When smart idle is enabled,, power consumption can be reduced from 17W to 11W.When resuming the working state (e.g. replaying), K15 automatically enters the working state and resumes output.
Three time values of 2min/10min/20min can be selected. When OFF is selected, it means that the intelligent power saving is not enabled and the K15 will continue to be in the normal working decoding state.
Note:
1.When using line input mode, smart idle function is not supported.
2.When PEQ is enabled, smart idle function is not supported.
U AUDIO
Support UAC1.0 and 2.0 modes. UAC 1.0 is driverless mode: supports PS5, Switch and other drive-free devices;UAC2.0: high bit-rate transmission mode.
Language
Switch between Chinese, English and Japanese
Reset option
You can reset the network, settings, EQ, Bluetooth, media library
Restore all: reset all parameters, will not downgrade firmware version
Others
1.Press the volume knob
You can switch between 'Turn off screen/turn on screen' and 'Mute/Unmute' from'Setting-Ohters-Press the volume knob'.
2.FW update
SOC online upgrade，SOC local upgrade,MCU Upgrade,Update log
3.Factory debug
When the K15 has some abnormalities, you could provide the abnormal log files to our engineers to analyze.
1.Insert a USB flash disk with more than 10M capacity;
2.Go to 'Menu'-'Other settings', then select'Factory debugging' option. The "Log saving is complete" window will pop up automatically. The log files will be automatically saved to the USB flash
disk.
3.Please send the log files to FiiO customer service.
About K15
You can view K15's SOC, MCU, FPGA, IP, SN code and other information Swipe the screen left and right for more information.
The Bluetooth version could be viewed in the FiiO Control APP. XMOS firmware version could be viewed in Window USB DAC driver panel.
