Qtx SPL500M User Manual page 5

Media player
Each SPL amplifier has an internal media player section for digital audio playback from
USB/SD/MMC media, FM tuner or via Bluetooth with its own display and control section (4)
Turn the source selector (6) to USB/SD/FM/BT to enable playback through the speakers.
Press the MODE button to select the function you require - USB, SD, FM radio or Bluetooth.

– Use this mode for both USB and SD/MMC cards
FM Radio – (the last chosen frequency will appear – i.e. 89-107MHz)

– Use this mode for Bluetooth™ selection
Playback from USB Device or SD/MMC Card
Inserting a USB memory device into the USB connector or SD/MMC card into the SD/MMC card
slot will automatically load up and begin playback of mp3 or wma audio tracks stored on the
media.
If playback does not start, press the Play/Pause button (16) or remove the memory device and
check that the stored files are the correct compressed audio format before re-connecting.
PLAY/PAUSE ( ) will alternately play or pause the selected track.

PREVIOUS TRACK ( ) will step backwards through tracks.

Holding the PREVIOUS TRACK button will reverse seek through the current track.
NEXT TRACK ( ) will step forwards through tracks.

Holding the NEXT TRACK button will forward seek through the current track.
USB/SD will toggle between USB or SD/MMC card media playback.
 
REPEAT will select between repeating track or tracks on the storage device.
FM Tuner
In FM tuner mode, the station frequency (in MHz) will be displayed.
For initial setup, press PLAY/PAUSE ( ) to begin the auto-tuning process.

The tuner will seek through all frequencies for strong signal reception (i.e. radio stations)
   
These will be stored into memory as , , , ... etc.
Stored stations can then be selected using the PREVIOUS or NEXT buttons ( )
 
Note: Pressing PLAY/PAUSE during auto-tune will allow manual tuning via PREVIOUS/NEXT
SPL User Manual