# Audio Operation

## Switching On and Off

To switch on the radio, press the on/off button (2). The display (1) is activated and the audio source that was set the last time the radio was turned off is played back.

The display (1) is illuminated for a few seconds each time a button is pressed.

To switch off the radio, press the on/off button (2) again. The current setting of the audio source will be saved.

## Adjusting the Volume

After the radio is switched on, the volume is always set to low.

To increase the volume, turn the on/off button (2) clockwise; to reduce the volume, turn it anticlockwise.

The volume setting <VL> or <Volume> will appear on the display for a few seconds with a value between 0 and 30. Before adjusting or changing a radio station, set the volume to a low setting; before starting an external audio source, set the volume to a medium setting.

To switch off the sound, you can briefly press the mute button (8). To switch on the sound again, either briefly press the mute button again or turn the on/off button (2) clockwise.

The volume can be changed at any time. If the menu function is activated, the display will return to the menu a few seconds after you have changed the volume.

The radio switches off automatically after 19 min, if during this time:

- The volume on the radio is set to 0,
- The radio is muted or
- The volume on the playback device (e.g. smartphone) is set to 0.

## Selecting an Audio Source

To select an audio source, press the source button (7) until the required internal or external audio source is shown in the display:

- DAB/DAB2: Digital radio via DAB+ (GPB 18V‑2 SC),
- FM/FM2: Analogue radio via FM,
- AUX: External audio source (e.g. smartphone) via the 3.5‑mm socket AUX IN (24) in the connector compartment (15),
- : External audio source (e.g. smartphone) via the Bluetooth® connection.

The current audio source can be seen on the audio source indicator (b) or Bluetooth® indicator (a).

The audio sources DAB and DAB2 (GPB 18V‑2 SC), as well as FM and FM2, do not differ in their functionality; they offer only additional preset spaces.

## Setting/saving DAB+ radio stations (GPB 18V‑2 SC)

To select the audio source DAB+ radio stations, press the source button (7) until DAB or DAB2 appears on the audio source indicator (b).

After a short initialisation, the last set radio station will be played back.

Each station name appears on the top line of the multi-function indicator (k). The additional information shown on the bottom line of the multi-function indicator can be set with the menu function.

- To switch the station, turn the source button (7) until the required station is shown in the display. Press the source button (7) to confirm the selection. The radio will switch to the selected station.
  Alternatively, you can press the seek button (scan down) (10) or the seek button (scan up) (9) to switch the station. The radio will switch to the next available station (in alphabetical order, either descending or ascending).

- To save a set station, press the preset button (5) of the required storage space until the number of the storage space appears in the storage space indicator (c).
  If the four storage spaces of the DAB audio source are occupied, then switch to the DAB2 audio source, in which four further storage spaces are available, by pressing the source button (7). Please note that you must reset the required station after switching to save the change.

- To start playback of a saved station, briefly press one of the preset buttons (5). The number of the storage space will appear on the storage space indicator (c). If required, switch between audio sources DAB and DAB2 by pressing the source button (7), to allow you to go back to all saved stations.

Note: If the radio signal is weak, <Weak Signal> will appear on the multi-function indicator (k). In this case, you can manually start the DAB+ station search.
To do this, either select <Auto Scan> from the menu or press the seek button (scan down) (10) and the seek button (scan up) (9) simultaneously. After the station search is complete, four stations will be saved in preset spaces 1 to 4. Stations that have already been saved will be overwritten here.

If no DAB+ radio stations can be found, <No DAB Station – Please Auto Scan> will appear on the multi-function indicator (k).

## Setting/Saving FM Radio Stations

To select the audio source FM radio stations, press the source button (7) until FM or FM2 appears on the audio source indicator (b).

GPB 18V‑2 C: The frequency of the current station will appear on the radio frequency indicator (d).

GPB 18V-2 SC: The frequency of each current station will appear on the top line of the multi-function indicator (k). The additional information shown on the bottom line of the multi-function indicator can be set with the menu function.

If there is sufficiently good reception of a suitable signal, the radio will automatically switch to stereo reception, and the stereo indicator (h) will appear in the display. The reception type can be changed to mono reception with the menu function.

- To set a specific station, turn the source button (7) (TUNE) until the required frequency or the required station is shown in the display.
- To search for the next station with high signal strength, briefly press the seek button (scan down) (10) or the seek button (scan up) (9). The next station found is shown in the display and played back.
- To search for all stations with high signal strength, press the seek button (scan down) (10) or the seek button (scan up) (9) for longer than half a second. Any station found is played back for 5 seconds, then the search is continued until the end of the frequency band. To cancel the station search, briefly press the seek button (scan down) (10) or the seek button (scan up) (9).
- To save a set station, press the preset button (5) of the required storage space until the number of the storage space appears in the storage space indicator (c).
  If the four storage spaces of the FM audio source are occupied, then switch to the FM2 audio source, in which four further storage spaces are available, by pressing the source button (7). Please note that you must reset the required station after switching to save the change.
- To automatically search for and save the stations with the best reception (AUTOSTORE), press the seek button (scan down) (10) and the seek button (scan up) (9) simultaneously. The radio will check all receivable stations and save the four stations with the best reception in preset spaces 1 to 4. Please note that stations that have already been saved will be overwritten here where necessary.
  Once the search has finished, the station saved in preset space 1 will be played back.
- To start playback of a saved station, briefly press one of the preset buttons (5). The number of the storage space will appear on the storage space indicator (c). If required, switch between audio sources FM and FM2 by pressing the source button (7), to allow you to go back to all saved stations.

## Setting the Rod Antenna

The radio is supplied with a fitted rod antenna (6). For FM radio operation, point the rod antenna in the direction that enables the best reception.

If the reception is insufficient, position the radio at a different location that enables better reception.

Note: When operating the radio in the direct vicinity of radio-communication equipment or radio transceivers, or other electronic equipment, the radio reception can be subject to interference.

## Connecting External Audio Sources via AUX

Remove the protective cap of the connector compartment (15) and insert the 3.5‑mm connector of the AUX cable (25) into the AUX IN socket (24). Connect the AUX cable to a suitable audio source.

To play back the AUX audio source, press the source button (7) until AUX appears on the audio source indicator (b).

After removing the AUX cable connector, reattach the protective cap of the connector compartment (15) to protect against dirt/debris.

If one of the preset buttons (5) is pressed during AUX operation, the radio will switch to the station that was saved in the last used radio operating mode.

## Playing Back/Controlling External Audio Sources via Bluetooth®

To play back an audio source (e.g. smartphone) via Bluetooth®, either press the source button (7) until the Bluetooth® indicator (a) appears in the display, or briefly press the Bluetooth® button (11) regardless of the current audio source.

Whilst a connection is being established or during the search for a connection, the Bluetooth® indicator (a) will flash.

GPB 18V‑2 SC: <Pairing> will appear on the multi-function indicator (k).

- If the radio has already been connected to an external audio source via Bluetooth® and if this audio source is available, a connection to this audio source will automatically be established.

- If no saved audio sources are available, the search process will start. Activate the new connection via the external audio source. For smartphones, that is generally possible via the settings in the Bluetooth® menu. The radio will appear as an available source under the name GPB 18V‑2 C xxxx or GPB 18V‑2 SC xxxx. Please observe the operating instructions for your audio source/smartphone.

- If an available connection to an audio source via Bluetooth® needs to be ended and a new connection needs to be searched for (PAIRING), press the Bluetooth® button (11) for longer than 0.5 seconds. Activate the connection as described above.

As soon as an audio source is connected via Bluetooth®, the Bluetooth® indicator (a) will light up continuously.

GPB 18V‑2 SC: The name of the device connected via Bluetooth® is displayed on the top line of the multi-function indicator (k). The text from the connected device appears on the bottom line.

If no connection can be established via Bluetooth®, the radio will switch off automatically after 19 minutes.

The audio source connected via Bluetooth® can also be controlled via the radio:

- To select a track and to start playback, briefly press the seek button (scan up) (9) or the seek button (scan down) (10) until the required track has been reached. Playback of the selected track is started automatically.

- To interrupt playback, press the mute button (8). The pause indicator (f) will appear in the display.

- To continue playback, press the mute button (8) again, change the volume via the on/off button (2) or press the seek (scan up) button (9) or the seek (scan down) button (10).

- To fast-forward or rewind within a track, press and hold the seek (scan up) button (9) or the seek (scan down) button (10) until the required place in the track has been reached.

If one of the preset buttons (5) is pressed during operation via Bluetooth®, the radio will switch to the station that was saved in the last used radio operating mode.

## Playback with Dual Speaker Sound (with Bluetooth® audio source)

If an audio source is played back via Bluetooth®, the dual speaker sound (DSS) function can be activated. Two radios (either GPB 18V‑2 C or GPB 18V‑2 SC) can be used as right-hand and left-hand speakers for the same playback.

Activating the dual speaker sound function:

- One of the two radios must already be connected to the audio source via Bluetooth®.
- Selecting the radio as the right-hand speaker: Select from the menu <DSS> → <DSSR> (GPB 18V‑2 C) or <Set DSS> → <Right Speaker> (GPB 18V‑2 SC).
- Selecting the radio as the left-hand speaker: Select from the menu <DSS> → <DSSL> (GPB 18V‑2 C) or <Set DSS> → <Left Speaker> (GPB 18V‑2 SC).
- Switch on the operating mode Bluetooth® on the second radio as well.
- Select the other speaker from the menu on the second radio.
- Control the playback via Bluetooth® as usual.

## Changing Menu Settings

To get to the menu function, press the mute button (8) (MENU) until the menu function indicator (e) appears in the display.

Navigating in the menu:

- To scroll through a menu: Turn the source button (7).
- To select and save a menu setting: Press the source button (7) (OK).
- To switch to a submenu: Press the source button (7).
- To switch from a submenu back to a higher menu: Briefly press the mute button (8). If the highest menu level has been reached, the radio will return to audio operation.

To leave the menu function on any level and return to audio operation, press the mute button (8) until the menu function indicator (e) in the display turns off. Alternatively, the radio will automatically switch back to audio operation 10 seconds after the last press of a button.

If menu settings are no longer being saved when you switch off the radio, replace the button cell (back-up battery).

## Menu Options (GPB 18V‑2 C)

The menu selection is partially dependent on the audio operating mode of the radio.

<EQ>
Sound menu: You can adjust the treble <TR> and the bass <BA> within a range of –5 to +5. The sound settings are saved separately for each audio source.

<TIME>
Time menu: You can choose between 12-hour <12HR> and 24-hour <24HR> time formats, and adjust the time manually.

<MONO> (with FM/FM2 audio source)
Mono reception menu: You can switch on <ON> or switch off <OFF> mono reception. Mono reception is recommended if the radio often switches between stereo and mono reception when a station has poor reception.

<DSS> (with Bluetooth® audio source)
Dual speaker sound menu: You can set the radio as a right-hand speaker <DSSR>, set it as a left-hand speaker <DSSL>, or switch off the function <OFF>.

## Menu Options (GPB 18V‑2 SC)

The menu selection is partially dependent on the audio operating mode of the radio.

Within the menus, the name of each menu is displayed on the top line of the multi-function indicator (k), and the selectable setting on the bottom line.

<Set EQ>
Sound menu: You can adjust the treble <Treble> and the bass <Bass> within a range of –5 to +5. The sound settings are saved separately for each audio source.

<Set Time>
Time menu:

- You can choose between 24-hour <24 Hour Mode> and 12-hour <12 Hour Mode> time formats.
- You can adjust the time manually with <Set Hour> or <Set Minute>.

- Note: If a radio station that transmits the time is selected with the DAB/DAB2 audio source, this time is automatically adopted. Manual time settings will be overwritten.

<Reset All>
Reset menu: You can reset all menu settings to factory settings <Yes> or return to the current settings <No>.

<Auto Scan> (with DAB/DAB2 audio source)
Automatic station search menu: You can start an automatic station search.

<Manual Tune> (with DAB/ DAB2 audio source)
Manual setting menu: You can set the required frequency manually.

<Display Type> (with DAB/DAB2 audio source)
Display mode menu: You can choose what text will appear on the bottom line of the multi-function indicator (k):

- The information broadcast by the radio station <Dynamic Label>,
- The frequency of the station <Frequency>,
- The signal strength <Signal Strength>,
- The program type broadcast by the radio station <Program Type>.

<Display Type> (with FM/FM2 audio source)
Display mode menu: You can choose what text will appear on the bottom line of the multi-function indicator (k):

- The information broadcast by the radio station <Radio Text>,
- The station name <Program Service>,
- The program type broadcast by the radio station <Program Type>.

<Set FM Mono> (with FM/FM2 audio source)
Mono reception menu: You can switch on <On> or switch off <Off> mono reception. Mono reception is recommended if the radio often switches between stereo and mono reception when a station has poor reception.

<Set DSS> (with Bluetooth® audio source)
Dual speaker sound menu: You can set the radio as a right-hand speaker <Right Speaker>, set it as a left-hand speaker <Left Speaker>, or switch off the function <OFF>.