Reference Audio Player User Manual
English Appearance Key Definition ( 03 ) ( 02 ) ( 08 ) ( 09 ) ( 01 ) ( 04 ) ( 05 ) ( 06 ) ( 07 ) ( 10 ) ( 11 ) 40 繁體中文 （ 01 ） Touchscreen （ 02 ） Breathing LED （ 03 ） Volume knob （ 04 ） Power / Screen lock （ 05 ） Next/Fast forward （ 06 ） Play/pause （ 07 ） Previous/Fast backward （ 08 ） 4.4mm balanced Line /Headphone output （ 09 ） 3.
English Preparation and improving the playback time. • Power off Long press “Power/ Screen lock”till you see the power off notice. Slide to turn off. Package Contents The package includes following items. If anything is missing, please contact your supplier. Battery Recharge • When the player is connected to an USB power adapter, Recharge starts immediately. • When the player is powered on and connected to a computer USB port, Please choose “recharge” icon on the screen.
English Headphones / Volume • The player have both 3.5mm and 4.4mm headphone jacks. • The player will pause if headphones are pulled out during playback,. • Rotate the volume knob, or move the slider to adjust volume. ( knob can be set to clockwise or counter-clockwise for turning up the volume in the setup menu. ) For new Bluetooth device: 1) Switch on “Bluetooth” in the setup menu, player starts to search for new devices. 2) Choose the device you want to connect. Till pairing success.
English The Drop-Down Menu pause. Pull from top of the screen will activate the drop-down menu. 2 3 1 4 5 > or < >at While playing, click< the bottom of home screen to switch to previous or next song. • Playing progress bar Slide in the progress bar area for quickly locating in the music file. 7 6 The menu includes following icons 1 Repeat Mode 2 Bluetooth 3 • Previous & Next Playback Screen In the playback screen, slide the cover area to switch screen information.
English File Browser There are 3 editable playlists: and . • My favorite For adding your favorite songs to it. File Browser • Recent playlist Click on the “Folders” on the home screen to enter File Browser, to manage music files on the TF card. • All songs • View music file Click on folders list, slide the screen page in up or down to view music files. • Return to the previous level > to return to the Click on< previous level.
English Show lyrics (On)/Off 关闭 / 无缝播放 /（结尾淡出） 文件切换效果 Notes: Output gain 4.4mm Balance output L3.0dB - R3.0dB Line out (balanced HP output) (High gain) Low gain 0dBu（0.77Vrms） Player Setup Breathing LED On/(Off) 雙擊喚醒 On/(Off) 按鍵鎖定 Volume knob +4dBu（1.2Vrms） Line out （+8.24dBu（2Vrms）） Unfixed Output type Output gain 3.5mm Unbalanced output L3.0dB - R3.
English Style 990 ATE Diffuse field (Near field) Firmware Update Diffuse field (Far field) (Short delay sharp rolloff) Sharp rolloff PCM Filter Slow rolloff Short delay slowrolloff Super slow rolloff Low dispersion short delay DSD Bluetooth (Cut off low frequency) Cut off high frequency Firmware Update • Before updating, please make sure the battery power is over 20% • Download the firmware file from www.lotoo.
English In case of the following failures, please try to resolve them with the notices.If the problem still exists, please contact our aftersales service. • Failure to boot Low battery voltage makes boot unavailable. Please recharge the battery and retry. • No sound from headphones The volume knob is set to minimum. Please adjust the headphone volume. The headphones have been damaged or in poor contact. Please try another ones The level of music files is too low.
SNR 121dB (20~20kHz,A-weight) Output Level +12dBu(High Gain) Channel Isolation -135dB Dynamic Range Noise Level -5.6dBu(Low Gain) 122dB@1kHz (20~20kHz,A-weight) -120dBu • Unbalanced Headphone Output(3.5mm) Freq Response +0.005/-0.259dB (20~20kHz) THD+N 0.00025% @1kHz(20~20kHz, A-weight, No load) SNR 121dB (20~20kHz,A-weight) Output Level Dynamic Range +12dBu(High Gain) -5.
