1. Introduction
Thank you for choosing the Monster High Power Speaker. This speaker is designed to deliver powerful, high-quality audio with zero distortion, making it ideal for various uses, including music playback, karaoke, and events. Its robust construction, integrated wheels for easy portability, and dynamic LED lights enhance its functionality and appeal. Please read this manual carefully before operating the device to ensure proper use and to maximize its lifespan.
2. Important Safety Instructions
- Read these instructions thoroughly before use.
- Keep this manual for future reference.
- Heed all warnings on the product and in the operating instructions.
- Follow all instructions.
- Do not use this apparatus near water.
- Clean only with a dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Only use attachments/accessories specified by the manufacturer.
- Unplug this apparatus during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
3. Package Contents
Ensure all items are present and in good condition upon unpacking:
- Monster High Power Speaker (MNGI30)
- Wired Microphone (13 feet cable included)
- Power Cable
- User Manual (this document)
4. Product Overview
Familiarize yourself with the various parts and controls of your Monster High Power Speaker.

Figure 4.1: Front View. This image shows the front of the Monster High Power Speaker, highlighting the main speaker grilles and the control panel at the top. The speaker features two large woofers with yellow accents and integrated LED lighting strips.

Figure 4.2: Back View. This image displays the rear of the Monster High Power Speaker, showing the input/output panel, power connection, and ventilation. The panel includes various ports for connectivity and controls for audio adjustments.

Figure 4.3: Side View. This image illustrates the side profile of the Monster High Power Speaker, emphasizing its tall, tower design and the integrated wheels at the base for easy transport. The side also shows the robust casing material.
4.1 Control Panel (Top)
- Display Screen: Shows current mode, track information, and settings.
- Master Volume Knob: Adjusts overall sound output.
- Mode Button: Switches between Bluetooth, Aux, USB, and FM radio modes.
- Play/Pause Button: Controls media playback.
- Previous/Next Track Buttons: Navigates through tracks.
- Microphone Volume Knob: Adjusts microphone input level.
- Echo Knob: Controls microphone echo effect.
- LED Light Button: Toggles LED light effects.
4.2 Rear Panel Connections
- Power Input: Connects to the main power supply.
- Aux Input (3.5mm): For connecting external audio devices via cable.
- USB Port: For playing audio from USB drives.
- Microphone Input (XLR/6.35mm Combo): For connecting the included wired microphone or other compatible microphones.
- XLR Output: For connecting to another speaker or audio system (TWS functionality).
5. Setup
5.1 Initial Placement
Place the speaker on a stable, flat surface. The integrated wheels allow for easy movement. Ensure there is adequate ventilation around the speaker.
5.2 Power Connection
- Connect the power cable to the Power Input port on the rear panel of the speaker.
- Plug the other end of the power cable into a standard electrical outlet (240 Volts).
- Press the Power button, usually located on the rear panel or top control panel, to turn on the speaker.
6. Operating Instructions
6.1 Bluetooth Pairing
- Turn on the speaker. The speaker will automatically enter Bluetooth pairing mode, indicated by a flashing Bluetooth icon on the display.
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Monster MNGI30" (or similar name) from the list of devices.
- Once paired, the Bluetooth icon will stop flashing, and you will hear a confirmation sound.
- You can now play audio from your device through the speaker.
6.2 TWS (True Wireless Stereo) Function
The TWS function allows you to connect two Monster MNGI30 speakers wirelessly for a true stereo sound experience.
- Ensure both speakers are turned on and not connected to any Bluetooth device.
- On one speaker (this will be the primary speaker), press and hold the TWS button (if available, or a specific mode button combination) until you hear a pairing sound.
- The primary speaker will search for the secondary speaker. Once connected, you will hear another confirmation sound.
- Now, connect your mobile device to the primary speaker via Bluetooth as described in Section 6.1. Audio will play through both speakers in stereo.
6.3 Using the Microphone
- Connect the included wired microphone to the Microphone Input port on the rear panel.
- Adjust the Microphone Volume knob on the top control panel to your desired level.
- Use the Echo knob to add or reduce echo effect to the microphone sound.
6.4 Aux Input
To play audio from devices without Bluetooth (e.g., MP3 players, older laptops):
- Connect a 3.5mm audio cable from your device's headphone jack to the Aux Input port on the speaker.
- Press the Mode button on the speaker until "AUX" is displayed.
- Control playback and volume from your connected device.
6.5 USB Playback
To play audio files directly from a USB flash drive:
- Insert a USB flash drive containing MP3 or WMA audio files into the USB port on the speaker.
- The speaker should automatically switch to USB mode and begin playback. If not, press the Mode button until "USB" is displayed.
- Use the Play/Pause and Previous/Next Track buttons on the speaker to control playback.
6.6 LED Lights
Press the LED Light button on the top control panel to cycle through different light modes or turn the lights off.
7. Maintenance
7.1 Cleaning
- Always unplug the speaker from the power outlet before cleaning.
- Use a soft, dry cloth to wipe the exterior surfaces of the speaker.
- Do not use liquid cleaners, aerosol sprays, or abrasive chemicals, as they may damage the finish or internal components.
- Keep the speaker grilles free of dust and debris. You may use a soft brush or vacuum cleaner with a brush attachment to gently clean them.
7.2 Storage
When not in use for extended periods, store the speaker in a cool, dry place, away from direct sunlight and extreme temperatures.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected; Power outlet not working; Speaker not turned on. | Ensure power cable is securely connected. Try a different outlet. Press the Power button. |
| No sound | Volume too low; Incorrect input mode selected; Device not connected properly. | Increase master volume. Press Mode button to select correct input. Reconnect Bluetooth/Aux cable. |
| Bluetooth not pairing | Speaker not in pairing mode; Device Bluetooth off; Speaker already connected to another device. | Ensure speaker is in Bluetooth mode (flashing icon). Turn on device Bluetooth. Disconnect from other devices. |
| Microphone not working | Microphone not connected; Microphone volume too low; Microphone switch off. | Ensure microphone is fully plugged in. Increase Microphone Volume knob. Check if microphone has an on/off switch. |
| Sound distortion | Volume too high; Audio source quality is poor. | Reduce master volume. Try a different audio source or file. |
9. Specifications
| Model Name | High Power Speaker GI30 |
| Model Number | MNGI30 |
| Brand | Monster |
| Speaker Type | Tower |
| Mounting Type | Floor Standing |
| Material | Plastic and Metal |
| Color | Black, metal and yellow |
| Connectivity Technology | Auxiliary, Bluetooth, TWS, XLR |
| Maximum Speaker Output Power | 1800 Watts |
| RMS Power | 450W RMS |
| Frequency Response | 40 Hz |
| Input Voltage | 240 Volts |
| Audio Output Mode | Mono (with TWS for Stereo) |
| Surround Sound Channel Configuration | 1.0 |
| Controller Type | App, Touch Panel |
| Product Dimensions | 53.9cm (D) x 47cm (W) x 136.9cm (H) |
| Product Weight | 47.2 Kilograms |
| Included Components | Microphone |
10. Warranty and Support
For warranty information and technical support, please refer to the official Monster website or contact their customer service. Keep your purchase receipt as proof of purchase for any warranty claims.
Online Support: Visit the official Monster website for FAQs, product registration, and support resources. www.monsterproducts.com/support
Customer Service: Refer to your product packaging or the Monster website for regional contact information.





