Lepy LP-838USB Bluetooth Subwoofer Amplifier User Manual

1. Introduction

The Lepy LP-838USB is a versatile 2.1 channel HIFI sound quality amplifier designed for both home and car audio systems. It features Bluetooth 5.0 connectivity, USB/U disk playback, and high bass adjustment, delivering lossless music experience. This amplifier supports multiple external connection modes, making it compatible with various audio devices.

2. Product Features

• 2.1 Channel HIFI Sound Quality: Delivers clear and powerful audio with dedicated subwoofer output.
• Bluetooth 5.0 Connectivity: Seamless wireless audio streaming from compatible devices.
• USB / U Disk Playback: Supports direct playback of audio files (APE/WAV/FLAC) from USB storage.
• High Bass Adjustment: Independent control for bass and treble frequencies.
• Remote Infrared Remote Control: Convenient operation from a distance.
• High-Power Audio Amplifier Chip: Ensures high reduction signal amplification and powerful output.
• Multiple Audio Device Connections: Compatible with phones, laptops, computers, tablets, and TVs.
• Lossless Output: Designed for high-fidelity audio reproduction.

3. Package Contents

Please check the package for the following items:

• Power amplifier host (Lepy LP-838USB)
• English instruction manual
• Infrared remote control

4. Specifications

5. Controls and Indicators (Front Panel)

1. Mode Switching: Press to cycle through input modes (e.g., Bluetooth, USB, AUX).
2. Last Song / Volume Reduction: Short press for previous track; long press to decrease volume.
3. Play / Pause: Toggles playback.
4. Next Song / Volume Up: Short press for next track; long press to increase volume.
5. Remote Control Receiver: Infrared sensor for remote commands.
6. High Frequency Adjustment (Treble): Adjusts the treble level.
7. Bass Adjustment: Adjusts the bass level.
8. Volume Level Adjustment (Power On/Off): Main volume control knob. Turn to adjust volume. Press to power on/off.
9. USB Socket: For connecting USB flash drives for audio playback.
10. Power Indicator: Illuminates when the amplifier is powered on.
11. USB Indicator: Illuminates when USB playback is active.
12. Bluetooth Indicator: Illuminates when Bluetooth mode is active and flashes during pairing.
13. Bass Volume Control: Adjusts the volume of the subwoofer output.

6. Remote Control Functions

1. Power On / Off (19): Turns the amplifier on or off.
2. Volume Up (20): Increases the main volume.
3. Last Song (21): Skips to the previous track.
4. Volume Reduction (22): Decreases the main volume.
5. Mode Switching (23): Cycles through input modes.
6. Play / Pause (24): Toggles playback.
7. Next Song (25): Skips to the next track.

7. Setup and Connections

7.1 Rear Panel Connections

1. Audio In Right (14): RCA input for the right channel of your audio source.
2. Audio In Left (15): RCA input for the left channel of your audio source.
3. Super Bass Out To Speakers (16): Green terminal block for connecting a passive subwoofer.
4. Speaker Outputs (17): Red and black terminals for connecting passive stereo speakers (R+, R-, L+, L-). Ensure correct polarity.
5. DC Voltage Input (18): Connect the DC 12V-15V power adapter here.

7.2 Connection Steps

1. Connect Speakers: Connect your passive stereo speakers to the Speaker Outputs (17) on the rear panel. Ensure positive (+) and negative (-) terminals match.
2. Connect Subwoofer (Optional): If using a passive subwoofer, connect it to the Super Bass Out To Speakers (16) terminal.
3. Connect Audio Source: Use RCA cables to connect your audio source (e.g., computer, mobile phone, TV) to the Audio In Left (15) and Audio In Right (14) RCA inputs.
4. Connect Power: Connect a DC 12V-15V power adapter (not included) to the DC Voltage Input (18).

Important: Ensure all connections are secure before powering on the amplifier. Incorrect wiring can damage the device or speakers.

8. Operating Instructions

8.1 Power On/Off

Press the Volume Level Adjustment knob (8) on the front panel or the Power On/Off button (19) on the remote control to turn the amplifier on or off.

8.2 Selecting Input Mode

Press the Mode Switching button (1) on the front panel or (23) on the remote control to cycle through available input modes: Bluetooth, USB, and AUX (RCA input).

8.3 Bluetooth Pairing

1. Switch the amplifier to Bluetooth mode using the Mode button. The Bluetooth indicator (12) will flash.
2. On your mobile device (phone, tablet, etc.), enable Bluetooth and search for available devices.
3. Select 'LP-838USB' from the list of devices to pair. Once paired, the Bluetooth indicator will stop flashing and remain solid.
4. You can now stream audio wirelessly from your device to the amplifier.

8.4 USB Playback

1. Insert a USB flash drive containing audio files (APE/WAV/FLAC) into the USB socket (9) on the front panel. The USB indicator (11) will illuminate.
2. The amplifier should automatically switch to USB mode and begin playback.
3. Use the Last Song (2), Play/Pause (3), and Next Song (4) buttons on the front panel or the remote control (21, 24, 25) to control playback.

8.5 Volume and Tone Adjustment

• Main Volume: Rotate the Volume Level Adjustment knob (8) on the front panel or use the Volume Up (20) / Volume Reduction (22) buttons on the remote.
• Treble: Adjust the High Frequency Adjustment (Treble) knob (6) to fine-tune high tones.
• Bass: Adjust the Bass Adjustment knob (7) to fine-tune low tones.
• Subwoofer Volume: Adjust the Bass Volume Control knob (13) for independent subwoofer level adjustment.

9. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or solvents.
• Ventilation: Ensure the amplifier has adequate ventilation. Do not block the cooling fins or place it in an enclosed space.
• Storage: Store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
• Power: Disconnect the power adapter when the amplifier is not in use for extended periods.

10. Troubleshooting

11. Warranty and Support

For any warranty claims or technical support, please contact the seller or retailer from whom you purchased the Lepy LP-838USB amplifier. Please provide your purchase details and the product model number (LP-838USB) when seeking assistance.