1. Product Overview
The Facmogu KS-33BT is a compact and versatile 2.1 channel stereo audio amplifier receiver designed for home theater, karaoke, and general audio systems. It delivers RMS 60W x 2 (Max 400W x 2) stereo output and includes an active subwoofer output. This amplifier supports multiple input options including Bluetooth 5.0, RCA, AUX, USB, SD card, and FM radio, providing flexible connectivity for various audio sources. It also features two microphone inputs with echo adjustment for karaoke applications.
Image: Front view of the Facmogu KS-33BT Stereo Audio Amplifier Receiver, showcasing its controls and display.
2. Important Safety Instructions
- Read all instructions carefully before operating the device.
- Keep the unit away from water, moisture, and direct sunlight.
- Do not block ventilation openings. Ensure adequate airflow around the unit.
- Use only the power cord and adapter supplied by the manufacturer.
- Do not attempt to repair or modify the unit yourself. Refer all servicing to qualified personnel.
- Disconnect the power plug from the outlet during lightning storms or when unused for long periods.
- Avoid placing heavy objects on the unit.
3. Package Contents
Please check the package for the following items:
- 1 x Facmogu KS-33BT Power Amplifier
- 1 x Power Adapter (110V/60Hz power cord)
- 1 x Remote Control
- 1 x User Manual
- 1 x Audio Cable (RCA to 3.5mm, typically included)
Image: The Facmogu KS-33BT amplifier, power adapter, remote control, and user manual, along with product dimensions.
4. Product Diagram and Controls
4.1 Front Panel
Image: Detailed diagram of the Facmogu KS-33BT amplifier's front and rear panels with labeled controls and ports.
- POWER Switch: Turns the unit ON or OFF.
- MODE Button: Cycles through input modes (USB/SD/MMC, FM, Bluetooth, AUX).
- USB/SD/MMC/FM/BT PLAYER Display: Shows current mode, track information, and FM frequency.
- SD Card Slot: For playing audio files from an SD card.
- USB-C Port: For playing audio files from a USB drive.
- Previous/Next Track Buttons: For navigating tracks in USB/SD/Bluetooth mode or FM stations.
- Play/Pause Button: For controlling playback in USB/SD/Bluetooth mode.
- MUSIC VOL Knob: Adjusts the overall music volume.
- INPUT Selector: Selects between CD/DVD, AUX, or Media Player (USB/SD/Bluetooth/FM) inputs.
- AUX Input: 3.5mm jack for connecting external audio devices.
- BASS Knob: Adjusts the bass level.
- TREBLE Knob: Adjusts the treble level.
- ECHO Knob: Adjusts the echo effect for microphones.
- MIC 1/2 VOL Knob: Adjusts the volume for both microphone inputs.
- MIC 1 Input: 6.35mm jack for connecting the first microphone.
- MIC 2 Input: 6.35mm jack for connecting the second microphone.
4.2 Rear Panel
- FM ANT Jack: Connects to the FM antenna for radio reception.
- AUDIO INPUT (CD/DVD, LINE): RCA jacks for connecting external audio sources like CD/DVD players or other line-level devices.
- AUDIO OUTPUT: RCA jacks for connecting to other audio equipment or recording devices.
- MAIN SPEAKERS (L/R) Output: Speaker terminals for connecting passive speakers (4-16Ω).
- DC POWER INPUT (12V 5-10A): For connecting an external DC power supply (if applicable, typically uses AC).
- BT ANT: Bluetooth antenna.
- POWER Input: AC 110V/60Hz power connection.
5. Setup Instructions
5.1 Connecting Speakers
- Ensure the amplifier is turned OFF and unplugged from the power outlet.
- Connect your passive speakers to the MAIN SPEAKERS (L/R) Output terminals on the rear panel. Ensure correct polarity (+ to + and - to -) for each speaker. The amplifier supports speakers with an impedance of 4-16Ω.
- If using an active subwoofer, connect its input to the AUDIO OUTPUT RCA jacks on the rear panel.
5.2 Connecting Audio Sources
- RCA Input (CD/DVD, LINE): Connect your CD player, DVD player, or other audio devices using RCA cables to the corresponding AUDIO INPUT jacks on the rear panel.
- AUX Input: Connect devices with a 3.5mm audio output (e.g., smartphones, tablets) to the AUX Input jack on the front panel using a 3.5mm audio cable.
- USB/SD Card: Insert a USB drive into the USB-C Port or an SD card into the SD Card Slot on the front panel.
Image: Icons illustrating the various input options available on the amplifier, including FM, CD/DVD, SD/MMC, Bluetooth 5.0, AUX/RCA, and MP3.
5.3 Connecting Microphones
- Connect up to two microphones to the MIC 1 Input and MIC 2 Input jacks on the front panel.
5.4 Power Connection
- Connect the supplied power cord to the POWER Input on the rear panel and then plug it into a standard AC 110V/60Hz wall outlet.
6. Operating Instructions
6.1 Power On/Off
- Flip the POWER Switch on the front panel to the "ON" position to power on the amplifier. The digital display will light up.
- Flip the switch to "OFF" to power down.
6.2 Selecting Input Source
- Use the MODE Button on the front panel or the remote control to cycle through the digital input sources: USB/SD/MMC, FM, and Bluetooth.
- Use the INPUT Selector knob on the front panel to choose between analog inputs: CD/DVD, AUX, or Media Player (for digital sources selected via MODE button).
6.3 Bluetooth Pairing
- Turn on the amplifier and select "Bluetooth" mode using the MODE Button. The display will show "BT".
- On your mobile device (phone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "KS-33BT" from the list of devices to pair. Once connected, the display may indicate a successful connection.
- Note: Maintain a distance within 16.4ft (5m) between your device and the amplifier without any wall blocking for optimal connection. For PC devices, keep the distance within 6.5ft (2m).
Image: A smartphone wirelessly connected to the Facmogu KS-33BT amplifier via Bluetooth, demonstrating its wireless audio streaming capability.
6.4 USB/SD Card Playback
- Insert a USB drive or SD card containing audio files into the respective port/slot.
- Select the "USB" or "SD" mode using the MODE Button. The amplifier will automatically begin playing audio files.
- Use the Previous/Next Track Buttons and Play/Pause Button to control playback.
6.5 FM Radio Operation
- Ensure the FM antenna is properly connected to the FM ANT Jack on the rear panel.
- Select "FM" mode using the MODE Button.
- Use the Previous/Next Track Buttons to scan for and select FM stations. The frequency range is 87.5-108MHz.
6.6 Microphone and Echo Adjustment
- Connect microphones to the MIC 1 Input and MIC 2 Input.
- Adjust the microphone volume using the MIC 1/2 VOL Knob.
- Adjust the echo effect for the microphones using the ECHO Knob.
Image: The Facmogu KS-33BT amplifier with two microphones plugged into the front panel, illustrating its microphone input and reverb effect capabilities.
6.7 Tone and Master Volume Control
- Adjust the overall music volume using the large MUSIC VOL Knob.
- Fine-tune the audio's bass response with the BASS Knob.
- Fine-tune the audio's treble response with the TREBLE Knob.
6.8 Remote Control Usage
- Before first use, remove the plastic insulating sheet from the remote control's battery compartment.
- The remote control allows for convenient adjustment of input mode, volume, track selection, and other functions from a distance.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or aerosols.
- Storage: If not in use for an extended period, unplug the unit and store it in a cool, dry place away from direct sunlight and extreme temperatures.
- Ventilation: Ensure that the ventilation openings are not obstructed to prevent overheating.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected; Power switch off; Outlet malfunction. | Ensure power cord is securely plugged in; Turn power switch ON; Test outlet with another device. |
| No sound output | Incorrect input selected; Volume too low; Speaker connections loose; Mute activated. | Select correct input source; Increase MUSIC VOL; Check speaker wiring; Ensure no mute function is active. |
| Bluetooth connection unstable or not connecting | Device too far; Interference; Amplifier not in Bluetooth mode. | Move device closer (within 16.4ft/5m, 6.5ft/2m for PC); Ensure no obstructions; Select Bluetooth mode on amplifier. |
| Remote control not working | Plastic insulating sheet still present; Battery drained; Obstruction. | Remove plastic sheet; Replace battery; Ensure clear line of sight to amplifier's IR receiver. |
| Poor FM reception | Antenna not connected or positioned poorly; Weak signal. | Connect FM antenna securely; Adjust antenna position for better reception. |
| Microphone not working or low volume | Microphone not plugged in correctly; MIC VOL too low; Microphone faulty. | Ensure microphone is fully inserted; Increase MIC 1/2 VOL knob; Test with another microphone. |
9. Technical Specifications
| Model Number | KS-33BT (A18392-MG-US) |
| Power Output | RMS 60W x 2, Max 400W x 2 |
| Channels | 2.1 Channel Stereo |
| Connectivity Technology | Bluetooth 5.0, USB, SD, RCA, AUX, FM Radio |
| Bluetooth Range | Up to 16.4 ft (5m) without obstructions; 6.5 ft (2m) for PC devices |
| FM Frequency Range | 87.5-108 MHz |
| Speaker Impedance | 4-16Ω |
| Microphone Inputs | 2 (6.35mm jacks) with Echo Adjust |
| Controller Type | Remote Control, Manual Knobs/Buttons |
| Product Dimensions (L x W x H) | 7.05 x 5.98 x 2.76 inches (17.9 x 15.2 x 7 cm) |
| Item Weight | 3.8 pounds (1.72 kg) |
| Color | Black |
| Power Supply | AC 110V/60Hz |
10. Warranty Information
Facmogu products are designed and manufactured to the highest quality standards. This product is covered by a limited warranty from the date of purchase. The warranty covers manufacturing defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or improper installation. Please retain your proof of purchase for warranty claims.
11. Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please contact Facmogu customer support. Refer to the product packaging or the official Facmogu website for the most current contact information.
Website: Visit the Facmogu Store on Amazon
