1. Introduction
This manual provides essential instructions for the safe and efficient operation of your Kaiser MSA-5812 Professional 12-inch Rechargeable Amplified Speaker Kit. Please read this manual thoroughly before using the product and retain it for future reference. This speaker system is designed for professional use in events and various settings, offering powerful audio output, Bluetooth connectivity, and portability.
Safety Information
- Do not expose the unit to rain or moisture to prevent fire or electric shock.
- Do not open the casing. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
- Ensure proper ventilation. Do not block any ventilation openings.
- Use only the power adapter specified for this device.
- Keep the unit away from heat sources, direct sunlight, and extreme temperatures.
- Avoid placing heavy objects on the unit.
2. Package Contents
Verify that all items listed below are included in your package:
- Kaiser MSA-5812 12-inch Amplified Speaker
- Wired Microphone
- Remote Control
- Power Adapter (not explicitly listed but implied for charging)
- User Manual (this document)
3. Product Overview
The Kaiser MSA-5812 is a versatile and portable amplified speaker system featuring a 12-inch woofer, Bluetooth connectivity, FM radio, and USB/SD card playback. It includes a wired microphone for karaoke or public address applications and dynamic LED lights.

Figure 3.1: Front view of the Kaiser MSA-5812 speaker, showcasing the 12-inch woofer and protective grille.
Control Panel
Familiarize yourself with the control panel located on the rear of the speaker:

Figure 3.2: Rear control panel with various inputs and adjustment knobs.
- Display Screen: Shows current mode, track number, or FM frequency.
- Mode Button: Switches between Bluetooth, FM Radio, USB, and SD card modes.
- Play/Pause Button: Controls playback in media modes.
- Previous/Next Track Buttons: Navigates tracks or FM stations.
- USB Port: For USB flash drive playback.
- SD Card Slot: For SD card playback.
- Volume Knob: Adjusts the master volume of the speaker.
- Bass Knob: Adjusts the bass level.
- Treble Knob: Adjusts the treble level.
- Mic Volume Knob: Adjusts the volume of the connected microphone.
- Echo Knob: Adjusts the echo effect for the microphone.
- Mic Input (6.35mm Jack): Connects the wired microphone.
- Aux Input (3.5mm Jack): Connects external audio devices via an auxiliary cable.
- Power Switch: Turns the speaker ON or OFF.
- LED Light Switch: Activates or deactivates the audiorhythmic LED lights.
- Charging Port: Connects the power adapter for charging.
Portability Features

Figure 3.3: Side view illustrating the integrated wheels and retractable handle for easy transport.
The MSA-5812 is designed for easy transport with integrated wheels and a retractable handle, making it convenient for mobile use.
4. Setup
Initial Charging
- Before first use, fully charge the speaker for approximately 6-8 hours.
- Connect the power adapter to the charging port on the rear panel and plug it into a suitable power outlet.
- The charging indicator light (if present) will illuminate during charging and typically change color or turn off when fully charged.
Powering On/Off
- To turn ON the speaker, flip the Power Switch on the rear panel to the 'ON' position.
- To turn OFF the speaker, flip the Power Switch to the 'OFF' position.
Connecting the Microphone
- Insert the wired microphone's plug into the 'Mic Input' jack on the control panel.
- Adjust the 'Mic Volume' and 'Echo' knobs to your desired levels.
5. Operating Instructions
Bluetooth Pairing
- Turn on the speaker. It will automatically enter Bluetooth mode or you can press the 'Mode' button until 'Bluetooth' appears on the display.
- Enable Bluetooth on your smartphone, tablet, or other compatible device.
- Search for available devices and select "MSA-5812" from the list.
- Once paired, the speaker will emit a confirmation sound, and you can begin playing audio from your device. The Bluetooth connection range is up to 10 meters.
USB/SD Card Playback
- Insert a USB flash drive or SD card (with music files) into the respective port/slot on the control panel.
- The speaker should automatically switch to USB or SD mode and begin playback. If not, press the 'Mode' button to select the correct source.
- Use the 'Play/Pause' and 'Previous/Next Track' buttons to control playback.
FM Radio
- Press the 'Mode' button until 'FM' appears on the display.
- Press and hold the 'Play/Pause' button to initiate an automatic scan for available FM stations. The speaker will save them automatically.
- Use the 'Previous/Next Track' buttons to navigate through the saved stations.
Auxiliary Input
- Connect an external audio device (e.g., MP3 player, laptop) to the 'Aux Input' jack using a 3.5mm audio cable.
- Press the 'Mode' button until 'AUX' appears on the display.
- Control playback and volume from your connected device.
LED Lights Control

Figure 5.1: The speaker's LED lights in operation, providing a visual effect.
- The speaker features audiorhythmic LED lights that can be activated or deactivated.
- Locate the 'LED Light Switch' on the rear control panel.
- Flip the switch to turn the LED lights ON or OFF as desired.
Volume and Tone Adjustments
- Use the 'Volume' knob to adjust the overall sound output level.
- Rotate the 'Bass' knob to increase or decrease the low-frequency sounds.
- Rotate the 'Treble' knob to increase or decrease the high-frequency sounds.
6. Maintenance
Cleaning
- Always turn off and unplug the speaker before cleaning.
- Use a soft, dry cloth to wipe the exterior surfaces.
- Do not use liquid cleaners, aerosols, or abrasive chemicals, as they may damage the finish or internal components.
Battery Care
- To prolong battery life, avoid fully discharging the battery frequently.
- If the speaker will not be used for an extended period, charge it to about 50% and store it in a cool, dry place. Recharge every 3-6 months to prevent deep discharge.
- The battery provides up to 7 hours of continuous music playback on a full charge.
Storage
- Store the speaker in a dry, dust-free environment.
- Avoid storing in areas with extreme temperatures or high humidity.
7. Troubleshooting
If you encounter issues with your Kaiser MSA-5812 speaker, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Battery discharged; Power switch off; Power adapter not connected. | Charge the battery; Turn the power switch ON; Ensure power adapter is securely connected. |
| No sound output | Volume too low; Incorrect input mode selected; Audio cable faulty; Device not playing. | Increase master volume; Select correct mode (Bluetooth, USB, FM, Aux); Check audio cables; Ensure source device is playing. |
| Bluetooth not connecting | Speaker not in pairing mode; Device Bluetooth off; Speaker too far from device. | Ensure speaker is in Bluetooth mode; Turn on device Bluetooth; Move device closer to speaker (within 10m). |
| Microphone not working | Microphone not connected; Mic volume too low; Microphone faulty. | Ensure microphone is securely plugged into 'Mic Input'; Increase 'Mic Volume' knob; Test with another microphone if available. |
| USB/SD playback not working | Incorrect mode; Incompatible file format; USB/SD card faulty. | Select USB or SD mode; Ensure music files are in compatible format (e.g., MP3); Try another USB/SD card. |
8. Specifications
Detailed technical specifications for the Kaiser MSA-5812 speaker:
| Brand | Kaiser |
| Model | MSA-5812 |
| Audio Power Output | 13,600W PMPO / 10W RMS |
| Woofer Size | 12 inches (30.48 cm) |
| Connectivity Technology | Bluetooth, Auxiliary, USB, SD Card |
| Bluetooth Range | Up to 10 meters |
| Compatible Devices | Laptop, Smartphone, MP3 Players |
| Power Source | Rechargeable Battery |
| Battery Life | Up to 7 hours of continuous music playback |
| Audio Input | Microphone (6.35mm), USB, Auxiliary (3.5mm) |
| Impedance | 4 Ohms |
| Dimensions (L x W x H) | 37.5 x 36 x 57 cm (14.76 x 14.17 x 22.44 inches) |
| Weight | 7.7 Kilograms (16.98 lbs) |
| Mounting Type | Floor Mount |
| Included Components | Remote Control, Wired Microphone |
| Special Features | Audiorhythmic LED lights (switchable), FM Radio |
9. Warranty and Support
Product Warranty
The Kaiser MSA-5812 speaker comes with a 30-day warranty from the date of purchase. This warranty covers manufacturing defects under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or improper installation.
Customer Support
For technical assistance, warranty claims, or any questions regarding your Kaiser MSA-5812 speaker, please contact Kaiser customer support. Refer to the product packaging or the official Kaiser website for the most current contact information.
When contacting support, please have your product model number (MSA-5812) and proof of purchase readily available.






