1. Introduction
This manual provides detailed instructions for the Linsoul KZ APTX-HD Bluetooth 5.0 Module Upgrade Cable. This module is designed to convert compatible KZ in-ear monitors into wireless earphones, offering high-fidelity audio transmission via Bluetooth 5.0 with APTX-HD support. It features a B PIN connector type, suitable for KZ-ZST, KZ-ZS10, KZ-AS10, KZ-BA10, KZ-AS06, KZ-ES4, and KZ-ZSR earphones.
Key features include a CSR8675 chip, Bluetooth 5.0, aptX HD audio, CVC noise reduction, AAC audio coding, IPX5 waterproof rating, and approximately 8 hours of playback time.
Image 1.1: Overview of the KZ APTX-HD Bluetooth 5.0 Module Upgrade Cable, showing the main unit with control buttons and the B PIN connectors for earphones.
2. Setup
2.1 Charging the Module
Before initial use, fully charge the Bluetooth module. Connect the module to a USB power source using the provided charging cable. The LED indicator will show charging status. A full charge typically takes approximately 2 hours.
Image 2.1: Illustration of battery capacity (130 mAh), 8 hours battery life, 100 hours standby, and 2 hours fast charging.
2.2 Connecting to Earphones
Identify the correct B PIN connectors on your KZ earphones. Carefully align the pins of the Bluetooth module with the earphone sockets and push them in until they are securely connected. Ensure the left (L) and right (R) connectors of the module match the respective earphone units.
Image 2.2: Close-up view of the B PIN connectors on the Bluetooth module, ready for attachment to compatible KZ earphones.
2.3 Pairing with a Device
- Power On: Press and hold the power button (usually the middle button on the control module) when the device is off. The blue LED will flash, and a voice prompt will indicate power on.
- Enter Pairing Mode: From the off state, press and hold the power button until the red and blue LEDs flash alternately. A voice prompt will confirm pairing mode.
- Connect via Bluetooth: On your smartphone or other Bluetooth-enabled device, go to the Bluetooth settings and search for available devices. Select "KZ APTX-HD" (or similar name) from the list to connect.
- Confirmation: Once successfully paired, the blue LED will flash periodically, and a voice prompt will confirm the connection.
Image 2.3: Diagram illustrating the line control buttons and their functions, including power on and pairing instructions.
3. Operating Instructions
3.1 Power On/Off
- Power On: Press the power button (middle button) when the module is off. The blue LED will flash, and a voice prompt will sound.
- Power Off: Press and hold the power button for approximately 3 seconds. The red LED will flash once, and a voice prompt will confirm power off.
3.2 Music Playback
- Play/Pause: Press the power button once to play or pause music playback.
- Volume Increase: Press the '+' button. A sound prompt will indicate when maximum volume is reached.
- Volume Decrease: Press the '-' button. Continue pressing to decrease volume until muted.
- Previous Song: Long press the '-' button to skip to the previous track.
- Next Song: Long press the '+' button to skip to the next track.
Image 3.1: Detailed view of the control module, showing the '+', '-', and power/multi-function buttons, along with the red LED indicator.
3.3 Call Management
- Answer/End Call: Press the power button once to answer an incoming call or end an ongoing call.
- Reject Call: Long press the power button to reject an incoming call.
4. Maintenance
- Cleaning: Use a soft, dry cloth to wipe the module and cables. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the module in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the module regularly, even if not in use for extended periods.
- Water Resistance: The module has an IPX5 waterproof rating, meaning it is resistant to splashing water and light rain. Do not submerse the module in water.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Cannot power on | Low battery | Charge the module fully. |
| Cannot pair with device | Module not in pairing mode; Bluetooth off on device; device too far. | Ensure module is in pairing mode (red and blue LEDs flash alternately). Turn on Bluetooth on your device. Move device closer to the module. Try restarting both devices. |
| No sound or intermittent audio | Volume too low; module not properly connected to earphones; interference; device out of range. | Increase volume on both module and connected device. Check earphone connections. Move away from sources of interference. Ensure device is within Bluetooth range (up to 10 meters). |
| Short battery life | Battery not fully charged; aging battery. | Ensure module is fully charged before use. Battery performance may degrade over time. |
6. Specifications
- Model: KZ APTX-HD
- Bluetooth Version: 5.0 + EDR
- Bluetooth Chip: CSR8675
- Audio Codecs: APTX-HD, AAC
- Noise Reduction: CVC Noise Reduction
- Waterproof Rating: IPX5
- Battery Capacity: 130 mAh Lithium Polymer
- Battery Life: Approximately 8 hours playback
- Standby Time: Approximately 100 hours
- Charging Time: Approximately 2 hours
- Compatible Earphones: KZ-ZST, KZ-ZS10, KZ-AS10, KZ-BA10, KZ-AS06, KZ-ES4, KZ-ZSR (B PIN connector)
- Package Dimensions: 5.12 x 3.94 x 0.39 inches
- Weight: 0.48 ounces
Image 6.1: Visual summary of the module's features, including CSR8675 chip, aptX HD, Bluetooth 5.0, low delay, AAC audio coding, CVC noise reduction, IPX5 waterproof, and 8 hours play time.
Image 6.2: Explanation of Bluetooth 5.0 + EDR benefits, highlighting 30% lower power consumption, further connection distance, faster signal transmission, and more stable connection performance.
7. Warranty and Support
This Linsoul product is covered by a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact the seller directly.
For technical support, troubleshooting assistance, or warranty claims, please contact Linsoul customer service through their official website or the platform where the product was purchased. Please have your purchase details and product model number (KZ APTX-HD) ready when contacting support.
