1. Introduction
Thank you for choosing the MAOZUA 326BT/298BT Series Bluetooth Audio Power Amplifier. This amplifier is designed to deliver high-fidelity audio for various applications, including home theater, car audio, and karaoke. Featuring Bluetooth 5.0 connectivity, FM radio, USB/SD card playback, and multiple microphone inputs, it offers versatile audio control and powerful sound output. Please read this manual thoroughly before operation to ensure proper use and to maximize your audio experience.
2. Safety Information
- Power Supply: Ensure the amplifier's voltage matches your local power supply. The 326BT US Plug version is 110V, and the EU Plug version is 220V. The 298BT supports 110V-240V. Connecting to an incorrect voltage can cause severe damage to the unit.
- Ventilation: Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
- Moisture: Keep the amplifier away from water, moisture, and high humidity environments.
- Heat Sources: Avoid placing the unit near heat sources such as radiators, heat registers, stoves, or other heat-producing appliances.
- Cleaning: Disconnect power before cleaning. Use a dry, soft cloth. Do not use liquid cleaners or aerosol cleaners.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Children: Keep out of reach of children.
3. Package Contents
Please check that all items are present in your package:
- 1 x MAOZUA Audio Power Amplifier (Model 326BT or 298BT)
- 1 x Remote Control
- 1 x Power Cable
- 1 x User Manual
- 1 x 32GB USB Card (Gift - *Note: USB/SD cards for media playback are generally not included unless specified as a gift.*)
4. Product Overview
4.1 Front Panel Controls (Model 326BT)
Figure 4.1: 326BT Front and Rear Panel Diagram
- Power ON / OFF: Main power switch.
- MIC Input (MIC1-MIC4): Connect microphones for karaoke.
- MIC Adjustment: Controls for microphone volume, echo, delay.
- TREBLE: Adjusts high frequencies.
- BASS: Adjusts low frequencies.
- Balance: Adjusts left/right channel balance.
- SD: SD card slot for media playback.
- LED Display: Shows current mode, track information, FM frequency.
- USB Disk: USB port for media playback.
- MIC VOL: Overall microphone volume control.
- MUSIC VOL: Overall music volume control.
- Balance Adjustment (EQ): 5-band graphic equalizer for fine-tuning audio frequencies.
4.2 Rear Panel Connections (Model 326BT)
Figure 4.2: 326BT Rear Panel Connections
- Audio Input (L/R): RCA inputs for external audio sources (e.g., CD/DVD player, computer).
- Audio Output (L/R): RCA outputs for connecting to other audio equipment.
- Speaker System (L/R): Speaker terminals for connecting passive speakers.
- Power Input: AC power input (220V-240V or 110V depending on region).
- DC12V Input: DC 12V power input for car use (10A-15A).
- FM ANT: FM antenna connection.
4.3 Front Panel Controls (Model 298BT)
Figure 4.3: 298BT Front and Rear Panel Diagram
- Power ON / OFF: Main power switch.
- Microphone Volume -/+: Adjusts microphone volume.
- Mic 1 / 2: Microphone inputs.
- Echo: Adjusts microphone echo effect.
- BASS: Adjusts low frequencies.
- Treble: Adjusts high frequencies.
- Loud -/+: Loudness control.
- Master Vol: Overall master volume control.
- Exchange Input: Input selector.
- SD Card: SD card slot for media playback.
- Display: Shows current mode, track information, FM frequency.
- USB Disk: USB port for media playback.
- Prev / Play.Pause / Next / Mode: Media playback controls.
4.4 Rear Panel Connections (Model 298BT)
Figure 4.4: 298BT Rear Panel Connections
- CD Input / DVD Input: RCA inputs for CD/DVD players.
- Output: RCA outputs.
- Main Channel 1 / 2: Speaker terminals for main speakers.
- Surround / Mid / Surround: Speaker terminals for surround/center speakers (5-channel).
- Power Supply: AC power input (110V-240V).
- FM ANT: FM antenna connection.
5. Setup Instructions
5.1 Power Connection
- AC Power: Connect the provided power cable to the amplifier's AC power input and then to a suitable wall outlet. Ensure the voltage matches the amplifier's specification (110V for US Plug, 220V for EU Plug on 326BT; 110V-240V for 298BT).
- DC12V Power (326BT only): For car use, connect a DC 12V power source (10A-15A) to the DC12V input terminals.
5.2 Speaker Connection
Connect your passive speakers to the amplifier's speaker terminals. Ensure correct polarity (+ to + and - to -) for each speaker. The amplifier supports speakers with an impedance of 4 to 16 ohms (326BT) or 4 to 8 ohms (298BT).
Figure 5.1: 326BT Amplifier Connection Diagram
Figure 5.2: 298BT Amplifier Connection Diagram
5.3 Audio Source Connection
- RCA Audio Input: Connect external audio devices (e.g., CD player, DVD player, computer, tape deck) to the 'Audio Input' (326BT) or 'CD Input / DVD Input' (298BT) RCA jacks using appropriate RCA cables.
- Microphones: Plug your microphones into the 'MIC Input' jacks (MIC1-MIC4 for 326BT, MIC1/MIC2 for 298BT).
- FM Antenna: Connect the FM antenna to the 'FM ANT' terminal for radio reception.
6. Operating Instructions
6.1 Power On/Off
Press the 'Power ON/OFF' switch on the front panel to turn the amplifier on or off.
6.2 Source Selection
Use the 'Mode' button on the front panel or remote control to cycle through input sources: Bluetooth, USB, SD, FM Radio, and AUX/Line Input.
6.3 Bluetooth Pairing
Figure 6.1: 326BT Bluetooth Connectivity
- Switch the amplifier to Bluetooth mode using the 'Mode' button. The LED display will show 'BLUE' or a Bluetooth icon.
- On your mobile device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select 'BT' or the amplifier's name from the list to pair. Once paired, you can stream audio wirelessly.
6.4 USB/SD Card Playback
Figure 6.2: 326BT USB/SD Card Input
- Insert a USB disk or SD card (up to 64GB, not included) containing MP3 audio files into the respective slot.
- Switch the amplifier to USB or SD mode. The amplifier will automatically begin playing the audio files.
- Use the 'Prev', 'Play/Pause', 'Next' buttons on the front panel or remote control to manage playback.
6.5 Microphone Usage (Karaoke)
Figure 6.3: 326BT 4 Microphone Inputs
- Connect microphones to the 'MIC Input' jacks.
- Adjust the 'MIC VOL' knob to control the overall microphone volume.
- For 326BT, use the 'MIC Adjustment' controls for individual microphone volume, echo, and delay effects.
- For 298BT, use 'Microphone Volume -/+' and 'Echo' controls.
6.6 FM Radio
Figure 6.4: 298BT FM Radio Feature
- Ensure the FM antenna is connected.
- Switch to FM mode using the 'Mode' button.
- The amplifier supports automatic search for stations within the 87.5MHz-108MHz range.
6.7 Audio Adjustment
- MUSIC VOL / Master Vol: Adjusts the overall music volume.
- TREBLE / BASS: Fine-tune high and low frequencies for desired sound.
- Balance: Adjusts the left and right channel output balance.
- EQ (326BT): Use the 5-band graphic equalizer sliders to adjust specific frequency ranges.
- Loudness (298BT): Boosts bass and treble at low volumes.
6.8 Remote Control Functions
Figure 6.5: 326BT Remote Control Functions
Figure 6.6: 298BT Remote Control Functions
The remote control provides convenient access to various functions including power, mode selection, volume adjustment, track control (for USB/SD), and EQ effects.
7. Maintenance
- Cleaning: Use a soft, dry cloth to wipe the exterior of the amplifier. Do not use abrasive cleaners or solvents.
- Dust: Regularly clean dust from ventilation grilles to ensure proper cooling.
- Storage: If storing the amplifier for an extended period, disconnect it from power and store it in a cool, dry place.
8. Troubleshooting
- No Power: Check if the power cable is securely connected and the power switch is ON. Verify the power outlet is functional. Ensure the correct voltage version is used for your region.
- No Sound Output:
- Check speaker connections for correct polarity and secure fit.
- Ensure the correct audio input source is selected.
- Increase the 'MUSIC VOL' or 'Master Vol' knob.
- Check if the audio source device is playing and its volume is up.
- Bluetooth Connection Issues:
- Make sure the amplifier is in Bluetooth mode.
- Ensure your device's Bluetooth is enabled and within range.
- Try unpairing and re-pairing the device.
- Microphone Not Working:
- Check microphone connections.
- Adjust 'MIC VOL' knob.
- Ensure microphones are functional.
- Poor FM Reception:
- Ensure the FM antenna is properly connected and extended.
- Adjust the position of the antenna for better signal.
9. Specifications
9.1 Model 326BT Specifications
Figure 9.1: 326BT Dimensions and Detailed Specifications
| Feature | Specification |
|---|---|
| Rated Power | 1200W |
| Peak Power | 2000W |
| Input Voltage | 220V-240V AC, DC12V (US Plug: 110V) |
| Rated Frequency | 20Hz - 20KHz (+/- 3dB) |
| Signal to Noise Ratio | 90dB |
| Standard Impedance | 4 to 16 ohm |
| Type of Power Amplifier | AV Power Amplifier (Class AB) |
| Channel | 2.0 Channel |
| Total Harmonic Distortion | ≤ 0.5% |
| Signal Input Sensitivity | 200mv (± 30mv) |
| Microphone Input Sensitivity | 9 mv (± 2mv) |
| Recording Level Output | 1V |
| Auxiliary Level Output | 1V |
| Support | USB Disk/Max 64GB SD Card (Not included) |
| Color | Black |
| Dimensions (L*W*H) | 26 x 29 x 10 cm (10.23 x 11.41 x 3.9 inches) |
| Features | 4 Mic Inputs, EQ, Reverberation, Fine Tuning, Balance, SD, USB, Bluetooth 5.0, FM Radio, LED Display |
9.2 Model 298BT Specifications
| Feature | Specification |
|---|---|
| Channel | 5 Channel |
| Power Input | 110V-240V 50Hz |
| Frequency Response | 20Hz-20KHz (+/-10dB) |
| Input Sensitivity | 150mV |
| Tone Control | Treble: 10dB at 10KHz, Mid: 8dB at 1kHz, Bass: 10dB at 100Hz |
| Surround Effect Control | 0-10dB |
| Signal to Noise Ratio | ≥ 80dB |
| Loudness | +6dB at 100Hz / +6dB at 10KHz |
| Load Impedance | 4 to 8 ohms |
| DC12V Input | No |
| Color | Golden/Black |
| Dimensions (L*W*H) | 35.5 x 28 x 9 cm (14 x 11 x 3.54 inches) |
| Features | 2 Mic Inputs, Bluetooth, FM Radio, Remote Control, USB/SD |
10. User Tips
- For optimal sound quality, ensure your speakers match the recommended impedance range of the amplifier.
- When using microphones for karaoke, experiment with the echo and delay settings to find the best vocal effect for your preference.
- If experiencing static on FM radio, try repositioning the antenna or the amplifier itself to improve signal reception.
- For USB/SD playback, ensure your audio files are in a compatible format (e.g., MP3).
11. Warranty and Support
For any issues, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
