Rumble — Troubleshooting Guide

TABLE OF CONTENTS

• 1. Quick Reference Table
• 2. Speaker Won't Turn On
• 3. Won't Pair Over Bluetooth
• 4. Wired Karaoke Mic Not Working
• 5. TF Card or USB Drive Won't Play
• 6. AUX Mode Not Working
• 7. Volume or Track Controls Not Responding as Expected
• 8. Distorted, Crackling, or Weak Sound
• 9. Charging Issues
• 10. If the Problem Persists

1. Quick Reference Table

2. Speaker Won't Turn On

1. Press the Power button — check for a power tone or light if the unit has one.
2. Connect the Type-C cable to charge the speaker; the built-in 2000mAh battery needs charging if fully discharged.
3. If there's still no response after charging, this may point to a hardware fault — contact support.

3. Won't Pair Over Bluetooth

1. Press the Function Mode Switch (M) to cycle through modes until Wireless/Bluetooth mode is selected.
2. On your phone, open Bluetooth settings, search for devices, and select "Rumble."
3. Stay within the 10m range during pairing, and make sure the speaker isn't already connected to another device.
4. If it still won't appear, power-cycle the speaker and try again.

4. Wired Karaoke Mic Not Working

1. Confirm the mic's cable is plugged into the Mic Microphone Interface, not the AUX port — these are separate ports and easy to mix up.
2. Check the mic's own volume/mute controls if it has any.
3. If there's still no sound through the mic, test with a different wired mic if available to rule out a cable issue.

5. TF Card or USB Drive Won't Play

1. Insert the TF card or USB drive into its port before or after selecting the mode — if nothing happens, remove and reinsert it.
2. Press the Function Mode Switch (M) to select TF or USB mode as appropriate.
3. Use the Pause/Play button to start playback if it doesn't begin automatically.
4. Check that audio files are in a commonly supported format, and test the card/drive in another device if it still won't play.

6. AUX Mode Not Working

1. Connect a 3.5mm audio cable between your device's headphone/output jack and the AUX port on Rumble.
2. Press M to cycle to AUX mode.
3. Check the volume on the source device itself, since AUX is a passive connection not controlled by Rumble's own volume buttons.

7. Volume or Track Controls Not Responding as Expected

A common mix-up: pressing briefly when you meant to hold, or vice versa — track and volume share the same two buttons, distinguished only by press length.

8. Distorted, Crackling, or Weak Sound

1. Lower the volume — Rumble's rated distortion is under 1% at normal listening levels, but very high volumes can introduce distortion.
2. If connected via Bluetooth, move closer to your phone or other source device and remove obstructions, since interference at the edge of the 10m range can affect audio quality.
3. If using AUX, USB, or TF card, check the source file or cable for quality issues.

9. Charging Issues

• Use only the supplied Type-C cable for charging.
• A full charge should provide up to 5 hours of playback, depending on volume and usage.
• If the speaker won't charge at all, try a different cable or power source before assuming a hardware fault.

10. If the Problem Persists

If the issue persists after performing all troubleshooting steps, please raise a support request.

Our support team will assist you further.

Support

• Visit: www.portronics.com
• Support Portal: support.portronics.com