Introduction
Thank you for purchasing the Kashimura KD-181 Equalizer Adapter. This device is designed to enhance the audio quality of your car's sound system by adding equalizer functionality to existing FM transmitters, AUX cables, or Bluetooth FM transmitters. Please read this manual thoroughly before use to ensure proper operation and to maximize your listening experience.
Safety Information
- Do not expose the device to extreme temperatures, direct sunlight, or moisture.
- Avoid dropping or subjecting the device to strong impacts.
- Do not attempt to disassemble or modify the device. This will void the warranty and may cause damage.
- Keep out of reach of children.
- Ensure all connections are secure before operating.
Product Overview
The Kashimura KD-181 is a compact equalizer adapter that allows you to select from four distinct sound modes: Normal, Treble Boost, Vocal Boost, and Bass Boost. It connects via USB and includes an AUX cable for audio input, ensuring compatibility with various car audio setups.

Image: The Kashimura KD-181 Equalizer Adapter, showing its USB connector, AUX input, and the four selectable sound modes (Normal, Treble, Vocal, Bass).
Key features include:
- Adds equalizer function to your existing audio setup.
- Four selectable sound modes: Normal, Treble, Vocal, Bass.
- USB powered with an additional USB port to avoid blocking the original port.
- Includes a 3.5mm stereo mini plug (AUX) cable for connection.
Setup
- Connect Power: Insert the USB connector of the KD-181 into a USB port in your car (e.g., on your FM transmitter, car charger, or car's head unit). The KD-181 also provides a pass-through USB port, allowing you to connect another USB device if needed.
- Connect Audio Input: Connect the included 3.5mm stereo mini plug (AUX) cable from the KD-181's AUX input to the audio output of your source device (e.g., smartphone, tablet, or the AUX output of your FM transmitter).
- Connect to Car Audio: Connect the other end of the 3.5mm stereo mini plug (AUX) cable from the KD-181's AUX output to the AUX input of your car's audio system.
- Power On: Once connected, the KD-181 will power on automatically when the car's ignition is turned on, or when power is supplied to the USB port.

Image: A Kashimura factory building, symbolizing the quality and origin of the product.
Operating Instructions
The KD-181 features a single button to cycle through its four equalizer modes. The current mode is indicated by an LED light.
- Select Sound Mode: Press the button on the KD-181 to cycle through the available sound modes. Each press will switch to the next mode in sequence.
- Available Modes:
- Normal: Standard audio output without enhancement.
- Treble Boost: Enhances high-frequency sounds for clearer vocals and instruments.
- Vocal Boost: Optimizes mid-range frequencies to make vocals stand out.
- Bass Boost: Amplifies low-frequency sounds for a deeper, richer bass.
- Adjust Volume: Adjust the volume using your car's audio system or the connected audio source device.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners or aerosols.
- Storage: When not in use for extended periods, store the device in a cool, dry place away from direct sunlight.
- Cable Care: Avoid bending or twisting the cables excessively to prevent internal damage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output. | Incorrect cable connection, no power, or incorrect audio source selection. |
|
| Sound quality is poor. | Loose connection, interference, or incorrect equalizer mode. |
|
| Equalizer modes are not changing. | Button malfunction or device not powered. |
|
Specifications
| Model Name | KD-181 |
| Brand | Kashimura |
| Color | Black |
| Product Weight | 20 g |
| Package Dimensions | 17.8 x 5.6 x 4 cm |
| Included Components | Adapter, 3.5mm stereo mini plug (AUX) cable |
| Equalizer Modes | Normal, Treble Boost, Vocal Boost, Bass Boost |
| Connectivity | USB (power), 3.5mm AUX (audio in/out) |
Warranty and Support
Kashimura products are designed for reliability and performance. For warranty information or technical support, please refer to the official Kashimura website or contact their customer service department. Keep your purchase receipt as proof of purchase.
Official Kashimura Website: www.kashimura.com