Tools / Power Tools
Bosch GPB 18V-6 C Professional Speaker User Guide
Quick guide for the Bosch GPB 18V-6 C Professional speaker, covering battery installation, audio operation via Bluetooth and USB, Multi-Speaker Sound features, and maintenance.
Table of contents
Quick guide from the manual
The Bosch GPB 18V-6 C Professional is a cordless speaker designed for audio playback from connected sources or via Bluetooth. It can be powered by Bosch 18V or 10.8V/12V Li-ion batteries, or a standard USB Type-C power supply with Power Delivery (USB-PD).
Device Description
The speaker features a carrying handle, integrated speakers, and a control panel with volume, Bluetooth, Multi-Speaker Sound, and playback controls. It includes a connector compartment with a USB-C input for power and a USB-C output for charging external devices.
Operation
Switching On/Off: Press and hold the On/Off button until the status indicator LEDs light up. The speaker automatically switches off after 20 minutes if no connection is established or playback is active.
Bluetooth Operation: By default, the speaker is in Bluetooth mode. Press and hold the Bluetooth button (>0.5s) to start a new connection search. The speaker will appear as 'GPB 18V-6 C xxxx' on your audio source.
USB Playback: Open the connector compartment and insert a USB storage medium into the output port. The speaker will automatically switch to USB playback if the medium is readable.
Multi-Speaker Sound: This feature allows you to transmit the current audio playback (Bluetooth or USB) to other compatible devices. Press the Multi-Speaker Sound button (>0.5s) to start or end transmission.
Battery and Power
Battery Installation: Open the battery compartment cover. For 18V batteries, slide into the 18V holder until it clicks. For 10.8V/12V batteries, slide into the respective holder. Close and lock the cover.
Charging External Devices: The USB output port can charge devices (e.g., mobile phones) with a maximum current of 1.5A while the speaker is switched on.
Maintenance
Keep the speaker clean by wiping it with a damp, soft cloth. Do not use detergents or solvents. Ensure the battery compartment cover and connector compartment cap are kept closed to protect against water and dust.
Manufacturer information
Bosch
Practical help
Common problems
Speaker switches off automatically
The speaker switches off after 20 minutes if no Bluetooth or Multi-Speaker Sound connection is established and no playback is occurring.
USB storage medium not read
Ensure the medium contains MP3 files in the top-level folder. Other file formats are not supported.
Power supply insufficient
If the USB power supply provides insufficient power, the speaker will switch itself off.
Before use
- Check the speaker for any visible damage before use.
- Fully charge the Li-ion battery before first use.
- Ensure the battery compartment cover and connector compartment cap are closed.
- Verify that the USB power supply meets the technical requirements (20V, min 5A, 100W recommended).
Specs in practice
- Nominal output per mid-range speaker
- 24W per speaker.
- Nominal output of bass speaker
- 40W.
- Protection rating IP54
- Protected against dust and splashing water (when battery cover and connector compartment are closed).
Model compatibility
- Compatible with Bosch 18V and 10.8V/12V Li-ion batteries.
- Requires USB Type-C power supply with Power Delivery (USB-PD) for mains operation.
- Multi-Speaker Sound feature is compatible with other devices featuring the same function (e.g., GPB 18VH-6 SRC).
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.