1. Introduction
The BOYA BY-W4 is an ultracompact and portable 2.4GHz four-channel wireless microphone system designed to deliver broadcast-quality and reliable audio performance. It is ideal for multi-person interviews, live performances, live streaming, conferences, panel discussions, and various content creation scenarios. With its four independent channels, it allows for simultaneous use of up to four microphones, ensuring clear and crisp audio capture.
2. Package Contents
Please check the package to ensure all items are present and in good condition:
- BY-W4 TX Transmitter *4
- BY-W4 RX Receiver *1
- 3.5mm TRRS to TRS Output Cable for Cameras *1
- 3.5mm TRRS to TRRS Output Cable for Smartphones *1
- 3.5mm TRRS Male to Dual TRRS Female Cable *1
- USB-C Charging Cable *3
- Fur Windshield *4
- Carrying Pouch *1
3. Product Overview
The BY-W4 system consists of transmitter (TX) units and a receiver (RX) unit. Familiarize yourself with the components and their functions:
BY-W4 RX (Receiver)
- USB-C Charging Port (DC 5V): For charging the receiver.
- Status Indicator: Displays connection and battery status.
- 3.5mm TRRS Output: Connects to recording devices (cameras, smartphones, computers).
- Belt Clip: For attaching the receiver to clothing or camera hot shoe.
- Power Button: Turns the unit on/off.
BY-W4 TX (Transmitter)
- USB-C Charging Port: For charging the transmitter.
- Status Indicator: Displays connection and battery status.
- Built-in Microphone: Omnidirectional microphone for audio capture.
- Belt Clip: For attaching the transmitter to clothing.
- Power/Mute Button: Turns the unit on/off and mutes/unmutes the microphone.
- Gain Control (+/- Button): Adjusts the microphone input level.
4. Setup and Connection
4.1 Charging the Units
Before first use, fully charge all TX and RX units using the provided USB-C charging cables. Connect the USB-C end of the cable to the charging port on each unit and the USB-A end to a standard USB power adapter (not included).
4.2 Powering On/Off
Press and hold the Power Button on both the TX and RX units for a few seconds to turn them on or off. The Status Indicator will light up.
4.3 Automatic Pairing
The BY-W4 units are designed for automatic pairing. Once powered on, the TX and RX units will automatically attempt to pair with each other. The Status Indicator will show a solid blue or green light when successfully paired.
4.4 Connecting to Recording Devices
The BY-W4 offers wide compatibility with various devices:
- For Cameras: Use the supplied 3.5mm TRRS to TRS Output Cable. Connect the TRRS end to the RX unit's 3.5mm output and the TRS end to your camera's microphone input.
- For Smartphones/Tablets (Android): Use the supplied 3.5mm TRRS to TRRS Output Cable. Connect one TRRS end to the RX unit's 3.5mm output and the other TRRS end to your smartphone's headphone/microphone jack.
- For iPhones/iPads: An additional Lightning to 3.5mm adapter (sold separately) is required. Connect the 3.5mm TRRS to TRRS Output Cable to the RX unit and then to the Lightning adapter, which then connects to your iPhone/iPad.
- For Computers/Laptops: Use the appropriate 3.5mm cable (TRRS to TRRS or TRRS to TRS depending on your computer's input) to connect the RX unit.
5. Operation
5.1 Mute Function
On the TX unit, briefly press the Power/Mute Button to mute or unmute the microphone. The Status Indicator will change to reflect the mute status.
5.2 Gain Control
Use the Gain Control (+/-) buttons on the TX unit to adjust the input sensitivity of the microphone. Increase gain for softer sounds and decrease for louder environments to prevent distortion.
5.3 Switchable Patterns (1-to-2 TX / 1-to-4 TX)
The BY-W4 system supports two operational patterns:
- One RX-to-four TX pattern (Default): All four transmitters can be used simultaneously with one receiver. The status indicator will be blue.
- One RX-to-two TX pattern: Two transmitters can be used with one receiver. The status indicator will be green.
Refer to the product documentation or manufacturer's website for instructions on how to switch between these patterns if needed.
5.4 Real-time Audio Monitoring
To monitor your audio in real-time, connect headphones to the 3.5mm TRRS Male to Dual TRRS Female Cable, and then connect this cable to the RX unit's 3.5mm output. This allows you to listen to the audio being recorded without delay.
6. Specifications
BY-W4 TX (Transmitter)
| Feature | Specification |
|---|---|
| Transmission Type | 2.4GHz ISM |
| Modulation | GFSK |
| Polar Pattern | Omnidirectional |
| Operating Range | Up to 30m (without obstacles) |
| RF Output Power | <10mW |
| Frequency Response | 50Hz-16kHz |
| SNR | >78dB |
| Sensitivity | -42dB |
| Built-in Li-ion Battery | 3.7V/ 110mAh |
| Charging Port | USB-C |
| Charging Time | Approx. 2 hours |
| Battery Life | Approx. 7 hours |
| Weight | Approx. 12.5g |
| Dimensions | 17.7x59x10mm |
BY-W4 RX (Receiver)
| Feature | Specification |
|---|---|
| Transmission Type | 2.4GHz ISM |
| Modulation | GFSK |
| Operating Range | Up to 30m (without obstacles) |
| Audio Output | 3.5 mm TRRS Output Jack |
| Built-in Li-ion Battery | 3.7V / 200mAh |
| Charging Port | USB-C |
| Charging Time | Approx. 2 hours |
| Battery Life | Approx. 7 hours |
| Weight | Approx. 18g |
| Dimensions | 20.2x65x12.8mm |
7. Maintenance
- Keep the device dry. Do not expose it to water or high humidity.
- Do not disassemble the unit. Repairs should only be performed by authorized service personnel.
- Clean the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Ensure the charging ports are free from dust and debris to maintain proper charging functionality.
8. Troubleshooting
- No Sound/Low Sound:
- Ensure both TX and RX units are powered on and paired (solid indicator light).
- Check all cable connections between the RX unit and your recording device.
- Verify the gain level on the TX unit is appropriately set.
- Confirm the microphone input is selected on your recording device.
- Check the volume settings on your recording device.
- Interference/Poor Audio Quality:
- Ensure the operating range of 30m (98ft) without obstacles is maintained.
- Avoid using the system near other 2.4GHz wireless devices that might cause interference.
- Ensure the fur windshields are properly installed on the TX units to reduce wind noise.
- Units Not Pairing:
- Turn both TX and RX units off and then on again to re-initiate pairing.
- Ensure units are within close proximity during initial pairing.
- Battery Not Charging:
- Verify the USB-C charging cable is securely connected to both the unit and the power source.
- Try a different USB-C cable or power adapter.
9. User Tips
- Multi-Person Recording: The BY-W4 system is designed to allow all four microphones (TX units) to be used simultaneously and synchronize with the receiver (RX unit) for conversations involving up to four people. This makes it excellent for group interviews or panel discussions.
- Optimal Placement: For best audio quality, clip the TX units to clothing approximately 6-8 inches (15-20 cm) from the speaker's mouth.
- Monitor Audio: Always use the real-time audio monitoring feature with headphones to ensure your audio is being captured correctly and to catch any potential issues during recording.
10. Warranty and Support
The BOYA BY-W4 system comes with a 2-year warranty, ensuring peace of mind regarding product quality and performance. For technical support, service, or warranty claims, please contact your retailer or visit the official BOYA website for detailed support information.
