1. Introduction
The LDZS BT-198E Bluetooth Stereo Audio Amplifier is designed to deliver crisp, powerful stereo sound with a dual 35W output. It is versatile for both home and vehicle use, supporting multiple input options and featuring a user-friendly LCD display with remote control for convenient operation.
Key Features:
- Dual Channel 35W × 2 Output: Provides clear and powerful stereo audio.
- Bluetooth 5.0 Wireless Connection: Seamlessly connect mobile phones, tablets, and laptops.
- Multiple Inputs Supported: Includes USB, SD card, AUX, and two MIC inputs with ECHO control for karaoke.
- Dual Power Input: Operates on DC 12V for vehicle use or AC 220–240V for home use.
- LCD Display + Remote Control: Easy operation with a clear display for playback status and full remote functionality.
- Compatible with 4–16Ω Speakers: Wide matching range for various speaker types.
2. Package Contents
Please check the box for the following items:
- 1 × BT-198E Bluetooth Amplifier
- 1 × Remote Control
- 1 × Power Cable (EU/US optional)
- 1 × English User Manual
- 1 × Color Box
3. Product Layout
3.1 Front Panel Controls
The front panel provides access to all primary controls and input ports:
- POWER Switch: Turns the amplifier on or off.
- MIC INPUT (MIC1, MIC2): 6.5mm standard microphone jacks.
- MIC VOL: Adjusts microphone volume.
- ECHO: Adjusts microphone echo effect.
- TREBLE: Adjusts high-frequency audio output.
- BASS: Adjusts low-frequency audio output.
- VOLUME: Main volume control for overall audio output.
- USB/SD Card Interface: Slots for USB flash drives and SD cards.
- MODE Button: Switches between input modes (Bluetooth, USB/SD, AUX, FM Radio).
- Playback Controls: Buttons for Play/Pause, Previous Song, Next Song, and Loop Playback.
- Display: Shows current mode, track number, FM frequency, etc.
3.2 Rear Panel Connections
The rear panel houses the power inputs and speaker terminals:
- DC 12V Input: For connecting to a 12V DC power source (e.g., car battery).
- AC 220V Input: For connecting to a standard AC power outlet (220-240V, 50Hz).
- FM Antenna: Connector for the FM radio antenna.
- Speaker Terminals (L+, L-, R+, R-): Connect your passive speakers here. Ensure correct polarity.
4. Setup Guide
Follow these steps for initial setup:
- Connect Speakers: Connect your passive speakers (4-16Ω impedance) to the speaker terminals on the rear panel. Ensure that the positive (+) terminal of the amplifier connects to the positive (+) terminal of the speaker, and similarly for the negative (-) terminals.
- Connect Power:
- For home use, connect the AC power cable to the 220V AC input on the rear panel and then to a wall outlet.
- For vehicle use, connect a 12V DC power source to the DC 12V input on the rear panel.
- Connect FM Antenna: Extend the FM antenna or connect an external FM antenna to the designated port on the rear panel for optimal radio reception.
- Power On: Press the POWER switch on the front panel to turn on the amplifier. The display will light up.
5. Operating Instructions
5.1 Mode Selection
Press the MODE button on the front panel or the remote control to cycle through available input sources: Bluetooth (Bt), USB/SD, AUX, and FM Radio.
5.2 Bluetooth Connection
To connect your device via Bluetooth:
- Switch the amplifier to Bluetooth mode using the MODE button. The display will show "Bt" and the Bluetooth indicator light will flash.
- Enable Bluetooth on your smartphone, tablet, or laptop.
- Search for available devices and select "LDZS" from the list.
- Once connected, the display will stop flashing, and you can play audio wirelessly.
5.3 USB/SD Card Playback
The amplifier supports lossless decoding for various audio formats (FLAC, WAV, APE, MP3).
- Insert a USB flash drive or SD card containing audio files into the respective slot on the front panel.
- The amplifier will automatically switch to USB/SD mode and begin playback.
- Use the Play/Pause, Previous Song, Next Song, and Loop Playback buttons on the front panel or remote control to manage playback.
5.4 AUX Input
Connect external audio devices (e.g., CD player, computer, phone without Bluetooth) to the AUX input using a standard 3.5mm audio cable. Switch the amplifier to AUX mode using the MODE button.
5.5 FM Radio Operation
To listen to FM radio:
- Switch the amplifier to FM Radio mode using the MODE button.
- Press the AUTO button (or a similar button on the remote) to automatically search for and save available radio stations.
- Use the CH- and CH+ buttons to navigate through the saved stations.
5.6 Microphone and Karaoke Function
The amplifier features dual microphone inputs for karaoke:
- Connect up to two microphones to the MIC1 and MIC2 input jacks.
- Adjust the MIC VOL knob to control the microphone volume.
- Use the ECHO knob to add an echo effect to your vocals.
5.7 Audio Adjustment
Use the TREBLE and BASS knobs on the front panel to fine-tune the audio's high and low frequencies. The main VOLUME knob controls the overall output level.
6. Remote Control Functions
The included remote control provides convenient access to various functions:
- 1. Standby/Power: Turns the amplifier on/off or puts it into standby mode.
- 2. Return: Navigates back in menus or functions.
- 3. MODE: Selects the input source (Bluetooth, USB/SD, AUX, FM).
- 4. CH-/CH+: Adjusts FM radio channels or navigates tracks/folders.
- 5. EQ: Selects equalizer presets.
- 6. Play Control: Includes Previous Track, Play/Pause, and Next Track buttons.
- 7. Sound Reduction (Volume -): Decreases the volume.
- 8. Sound Increase (Volume +): Increases the volume.
- 9. Number Selection Keys (0-9): For direct input or selection.
7. Maintenance
To ensure the longevity and optimal performance of your BT-198E amplifier, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners, aerosols, or solvents, as they may damage the finish or internal components.
- Storage: Store the amplifier in a cool, dry place away from direct sunlight, high temperatures, and excessive humidity.
- Ventilation: Ensure that the amplifier has adequate ventilation. Do not block any ventilation openings, as this can lead to overheating.
- Power Disconnection: Unplug the amplifier from the power source when not in use for extended periods or during electrical storms.
8. Troubleshooting
If you encounter issues with your amplifier, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected or loose; power outlet faulty. | Ensure power cable is securely connected to both the amplifier and a working power outlet. Check the power switch. |
| No sound output | Speakers not connected correctly; volume too low; incorrect input mode selected. | Verify speaker connections and polarity. Increase the VOLUME. Press MODE to select the correct input source. |
| Bluetooth not connecting | Amplifier not in Bluetooth mode; device Bluetooth off; incorrect device selected. | Switch amplifier to Bluetooth mode. Ensure Bluetooth is enabled on your device. Select "LDZS" from your device's Bluetooth list. |
| USB/SD card not playing | Card/drive not inserted correctly; unsupported audio format; corrupted files. | Reinsert the USB drive/SD card. Ensure audio files are in supported formats (FLAC, WAV, APE, MP3). Try another USB/SD card. |
| Poor FM radio reception | Antenna not extended or poorly positioned. | Extend the FM antenna fully and adjust its position for better signal reception. |
| Microphone not working | Microphone not connected; MIC VOL too low. | Ensure microphone is securely plugged into MIC1 or MIC2. Increase the MIC VOL knob. |
9. Specifications
Detailed technical specifications for the BT-198E amplifier:
| Feature | Specification |
|---|---|
| Model | BT-198E |
| Amplifier Type | HIFI Stereo Power Amplifier |
| Power Output | 35W × 2 (Dual Channel) |
| Input Voltage | DC 12V / AC 220–240V (50Hz) |
| Channel | 2.0 Stereo |
| Bluetooth Version | 5.0 |
| Supported Inputs | Bluetooth, USB, SD Card, AUX, Microphone (2 inputs) |
| FM Radio | Supported |
| Impedance Range | 4–16Ω |
| Frequency Response | 20Hz–20KHz |
| Audio Decoding | Lossless decoding (FLAC, WAV, APE, MP3) |
| Controls | Volume, Bass, Treble, Mic Volume, Echo |
| Product Dimensions (L×W×H) | 18 × 13.8 × 5.5 cm (7.1 × 5.4 × 2.2 inches) |
10. User Tips
- Speaker Matching: Always ensure your speakers' impedance (4-16Ω) matches the amplifier's specifications to prevent damage and ensure optimal sound quality.
- Volume Control: Start with the volume at a low level and gradually increase it to avoid sudden loud sounds and potential speaker damage.
- Audio Quality: For the best audio experience, use high-quality audio cables and lossless audio files when possible.
- Bluetooth Range: Keep your Bluetooth device within a reasonable range (typically up to 10 meters) for a stable wireless connection.
11. Warranty and Support
This product comes with a standard manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.
