1. Introduction
The Lepy LP-168S is a high-quality 2.1 channel super bass audio digital amplifier designed to deliver transparent tone, powerful bass output, and minimal distortion. Its compact size and robust construction make it suitable for various audio applications, including car audio systems, home theaters, and connecting to personal computers, CD/DVD players, MP3/MP4 players, and mobile phones.
This manual provides detailed instructions for setting up, operating, and maintaining your LP-168S amplifier to ensure optimal performance and longevity.
2. Safety Information
- Ensure the amplifier is connected to a stable 12V DC power source with a recommended current of 5A. Using an incorrect power supply can damage the unit.
- Do not expose the amplifier to water, moisture, or extreme temperatures.
- Avoid placing the amplifier in direct sunlight or near heat sources.
- Do not open the amplifier casing. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the amplifier to prevent overheating.
- Keep out of reach of children.
3. Package Contents
Please check the package for the following items:
- 1 x Lepy LP-168S Amplifier
- 1 x Original packing (Note: Power cord is excluded and must be purchased separately)
4. Product Overview
4.1 Features
- Durable aluminum alloy outer shell with sandblasted and anodic oxidation coloring processed surface.
- Delicate RCA input sockets for excellent weak signal transmission.
- Front panel controls for Bass, Treble, and Volume adjustment.
- AUX stereo audio input for easy connection to various digital music players and sources.
- Fashionable and delicate outlook with super bass and transparent tone output.
- Built-in USB output (5V, 500mA) for charging mobile phones or MP3 players.
- High-quality PCB circuit with specialized bass amplifier chip and JRC4558 circuit.
4.2 Controls and Connections
The LP-168S amplifier features intuitive controls on the front panel and clearly labeled connections on the rear panel.
Front Panel Controls:
- Power Switch: Toggles the amplifier on/off.
- Power Indicator: Illuminates when the amplifier is powered on.
- Subwoofer Level Adjustment (VOLUME): Adjusts the output level of the subwoofer channel.
- Bass Amplitude Indicator (X-OVER 50Hz-200Hz): Indicates the crossover frequency range for bass.
- Treble Adjustment (TREBLE): Controls the high-frequency output.
- Bass Adjustment (BASS): Controls the low-frequency output for the main channels.
- Volume Adjustment (VOLUME): Master volume control for all channels.
- AUX Input Interface (AUX): 3.5mm stereo input for portable devices.
Rear Panel Connections:
- AUDIO INPUT (RCA): Left (L) and Right (R) signal inputs for audio sources.
- Subwoofer Output: Two sets of terminals for connecting subwoofer speakers.
- Main Speaker Output (+R, -R, +L, -L): Terminals for connecting main stereo speakers.
- DC5V Output (USB): USB port providing 5V, 500mA power for charging devices.
- POWER INPUT (DC13.5V 5A): Power jack for connecting the 12V DC power adapter.
5. Setup
Follow these steps to set up your Lepy LP-168S amplifier:
-
Connect Speakers:
- Connect your main stereo speakers to the +R, -R, +L, -L terminals on the rear panel. Ensure correct polarity (+ to + and - to -).
- Connect your subwoofer speaker(s) to the Subwoofer Output terminals.
- Ensure all speaker wires are securely connected and do not short-circuit. The amplifier supports speakers with an impedance of 2-8Ω.
-
Connect Audio Source:
- For devices with RCA output (e.g., CD/DVD players, some PCs), connect them to the AUDIO INPUT (RCA) jacks on the rear panel using an RCA cable. Match the Left (L) and Right (R) channels.
- For devices with a 3.5mm audio output (e.g., mobile phones, MP3/MP4 players, some PCs), connect them to the AUX Input Interface on the front panel using a 3.5mm audio cable.
Figure 3: Connectivity Diagram. This illustrates how various audio sources can be connected to the amplifier and how the amplifier outputs to speakers. -
Connect Power:
- Connect a 12V DC power adapter (not included, recommended 5A) to the POWER INPUT (DC13.5V 5A) jack on the rear panel.
- Plug the power adapter into a suitable power outlet.
6. Operation
-
Power On/Off:
Flip the Power Switch on the front panel to the 'ON' position. The Power Indicator light will illuminate.
-
Adjust Volume:
Rotate the main VOLUME knob on the front panel to adjust the overall sound level to your preference.
-
Adjust Tone:
- Use the TREBLE knob to increase or decrease high frequencies.
- Use the BASS knob to increase or decrease low frequencies for the main channels.
- Adjust the Subwoofer Level (VOLUME) knob to control the intensity of the bass output from your subwoofer.
-
Using USB Output:
The DC5V Output (USB) port can be used to charge compatible mobile phones or MP3 players. Connect your device using a standard USB charging cable.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | LP-168S |
| Rated Power | 40W x 2 (main channels) + 68W (subwoofer) |
| Maximum Power | 150W |
| Speaker Impedance | 2-8Ω |
| Audio Sensitivity | 200MV |
| Signal To Noise Ratio | 91 - 100dB |
| Frequency Range (Hz) | 87.5MHz - 108.0MHz |
| Audio Encoding | Multichannel |
| Item Size | 17.6cm x 12.7cm x 4.3cm (approx. 6.9 x 5.0 x 1.7 inches) |
| Item Weight | 450g (approx. 0.99 lbs) |
| Material | Alloy Aluminum |
| Color | Black |
| Certification | CE |
| USB Output | 5V, 500mA |
8. Troubleshooting
If you encounter issues with your LP-168S amplifier, please refer to the following common problems and solutions:
-
No Power:
- Ensure the power adapter is securely connected to both the amplifier and a working power outlet.
- Verify that the power switch on the front panel is in the 'ON' position.
- Check if the power adapter is providing the correct 12V DC output.
-
No Sound:
- Check all audio input cables (RCA or AUX) are securely connected to both the source device and the amplifier.
- Ensure the audio source device is playing and its volume is turned up.
- Verify that all speaker wires are correctly connected to the amplifier and speakers, with no loose connections or short circuits.
- Increase the main VOLUME knob on the amplifier.
- If using a subwoofer, ensure its dedicated VOLUME knob is also turned up.
-
Distorted Sound:
- Reduce the volume on both the audio source and the amplifier. Overdriving the amplifier can cause distortion.
- Check the quality of your audio input cables; faulty cables can introduce noise or distortion.
- Ensure your speakers are compatible with the amplifier's power output and impedance.
- Adjust the BASS and TREBLE controls to see if the distortion is related to specific frequencies.
-
USB Charging Not Working:
- Ensure the amplifier is powered on.
- Check the USB cable for damage and ensure it's properly connected to both the amplifier and the device.
- Note that the USB output provides 5V, 500mA. Some devices may require higher current for faster charging.
9. User Tips
- Power Supply: For optimal performance, especially when driving demanding speakers or subwoofers, ensure your 12V power supply can consistently deliver the recommended 5A or more. A stable power supply is crucial for clear audio output.
- Cable Quality: Invest in good quality RCA and speaker cables. Poor quality cables can introduce noise and degrade sound quality.
- Speaker Matching: While the amplifier supports 2-8Ω speakers, matching your speakers' impedance and power handling capabilities closely with the amplifier's output will yield the best sound and prevent damage.
- Ventilation: Always ensure the amplifier has adequate airflow around its heat sinks to prevent overheating, especially during prolonged use at high volumes.
10. Warranty and Support
For any issues not covered in this manual or for further assistance, please contact the seller or manufacturer's customer support. Keep your purchase receipt as proof of purchase for any warranty claims.
