Introduction
Thank you for purchasing the LEKATO K28 Mini Guitar Headphone Amplifier. This compact and portable device allows guitarists to practice silently with headphones, offering a range of classic effects and a built-in Bluetooth receiver for playing along with backing tracks. Please read this manual thoroughly to understand the features and operation of your new amplifier.

LEKATO Mini Guitar Headphone Amp connected to an electric guitar, with headphones for quiet practice.
Product Features
- Five Classic Effects: Supports Clean, Overdrive, Chorus, Distortion, and Wah effects for versatile sound shaping.
- Built-in Analog Amplifier: Features true analog circuitry that faithfully simulates the response of traditional guitar amplifiers.
- Bluetooth Receiver: Allows wireless input of backing tracks from a mobile device for practice. Note: This unit does not support Bluetooth headphones.
- Headphone and Speaker Output: Equipped with a 1/8 inch (3.5mm) output for headphones or external speakers.
- Rechargeable Battery: Integrated lithium battery provides over 8 hours of continuous use on a single charge.
- Portable Design: Compact and lightweight, making it ideal for practice anywhere.

LEKATO Mini Guitar Headphone Amp with 5 classic effects: Clean, Overdrive, Chorus, Distortion, and Wah. A guitarist is shown playing an electric guitar, demonstrating the amp's versatility.

The LEKATO Mini Guitar Headphone Amp connected to a guitar, with a smartphone displaying a music app. This image illustrates the built-in Bluetooth receiver function for playing backing tracks wirelessly.
Package Contents
Verify that all items are present in the package:
- LEKATO K28 Mini Guitar Headphone Amplifier
- USB Charging Cable
- Audio Cable (3.5mm to 3.5mm)
- User Manual
- Protective Bag

The complete package contents of the LEKATO Mini Guitar Headphone Amp, including the amplifier unit, USB charging cable, audio cable, user manual, and a protective bag, laid out on a dark surface.
Controls and Functions
Familiarize yourself with the various controls and ports on your LEKATO K28 amplifier:
- 1/4 inch (6.35mm) Guitar Input Jack: Connects directly to your electric guitar. The plug is 180-degree rotatable for convenience.
- 1/8 inch (3.5mm) Headphone/Speaker Output: Connect your headphones or external speakers here.
- Effect Selector Switch: Cycles through the 5 available effects: Clean, Overdrive, Chorus, Distortion, and Wah.
- Volume (VOL) Switch: Adjusts the output volume of the guitar signal.
- Bluetooth Indicator Light: Shows the status of the Bluetooth connection.
- Power Button: Turns the unit on or off.
- USB Charging Port: For recharging the internal battery.

A split image showing the LEKATO amp being charged via USB and a close-up of its controls, highlighting the adjustable volume and effect indicators.
Setup
- Charge the Amplifier: Before first use, fully charge the amplifier using the provided USB cable and a standard USB power adapter (not included). The charging indicator will show status.
- Connect to Guitar: Plug the 1/4 inch (6.35mm) jack of the LEKATO K28 directly into your guitar's output jack. Adjust the plug angle if necessary using its 180-degree rotation feature.
- Connect Headphones/Speakers: Plug your headphones or external speakers into the 1/8 inch (3.5mm) output jack on the amplifier.
- Power On: Press and hold the Power button to turn on the amplifier.
Operating Instructions
Using Guitar Effects
Press the Effect Selector Switch to cycle through the five available effects: Clean, Overdrive, Chorus, Distortion, and Wah. The corresponding indicator light will illuminate to show the active effect.
Adjusting Volume
Use the Volume (VOL) switch to increase or decrease the output volume of your guitar signal through the headphones or speakers.
Connecting via Bluetooth (for Backing Tracks)
- Ensure the LEKATO K28 is powered on. The Bluetooth indicator will flash, indicating it's ready for pairing.
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "LEKATO K28" from the list of devices to pair.
- Once paired, the Bluetooth indicator on the amplifier will glow solid.
- You can now play music from your device, and it will be mixed with your guitar signal through the headphones/speakers.
Important: The LEKATO K28 functions as a Bluetooth receiver for audio input only. It cannot transmit audio to Bluetooth headphones.

A close-up of the LEKATO Mini Guitar Headphone Amp connected to an electric guitar, with headphones and an external speaker shown as output options. This highlights the 3.5mm output for private practice or monitoring.

A musician playing a bass guitar with headphones, emphasizing quiet practice. The amp's 180-degree rotatable plug is also shown.
Maintenance
- Charging: Recharge the amplifier when the battery indicator is low. Use the provided USB cable and a compatible 5V USB power source.
- Cleaning: Wipe the unit with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Storage: Store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures. Use the protective bag when not in use.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge it regularly, even if not in use for extended periods.

The LEKATO Mini Guitar Headphone Amp being charged via a USB cable, with an icon indicating 8 hours of battery life. This image demonstrates the rechargeable lithium battery and charging method.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from headphones/speakers. | Unit is off, low battery, volume too low, headphones not properly connected, guitar not connected. | Ensure unit is on and charged. Increase volume. Check headphone and guitar connections. |
| Bluetooth not connecting. | Bluetooth not enabled on device, unit not in pairing mode, device too far. | Ensure Bluetooth is on your device. Restart the amplifier to enter pairing mode. Keep device within range (16-33 feet). |
| Sound is distorted or noisy. | High volume, faulty cable, interference. | Reduce volume. Try a different audio cable. Move away from other electronic devices. |
| Short battery life. | Battery not fully charged, aging battery. | Ensure full charge before use. Battery life may decrease over time. |
Specifications
- Model: K28
- Brand: LEKATO
- Effects: Clean, Overdrive, Chorus, Distortion, Wah
- Input: 1/4 inch (6.35mm) Guitar Jack
- Output: 1/8 inch (3.5mm) Headphone/Speaker Jack
- Connectivity: Bluetooth Receiver (for audio input)
- Battery: Rechargeable Lithium-ion
- Battery Life: Approximately 8 hours (continuous use)
- Weight: 0.15 kg (approx. 0.33 lbs)
- UPC: 793811896183
Warranty and Support
The LEKATO K28 Mini Guitar Headphone Amplifier comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and quality-related issues.
If you encounter any problems or have questions regarding your product, please contact LEKATO customer support. Provide your purchase details and a description of the issue for prompt assistance. In case of a confirmed quality defect, a replacement may be provided.


