Introduction
The Bolymic BL-4200SB-4HS32 is a 4-channel UHF professional wireless microphone system designed for various applications including stage presentations, theater, speech, and drama. This system offers reliable performance and flexibility with its advanced features.
Each system includes one receiver and four headset microphones with corresponding beltpack transmitters. The system features 100 selectable channels per microphone, allowing for easy frequency management and expansion. It provides versatile audio output options with four individual balanced XLR outputs and one mixed 1/4" output.
Package Contents
Please verify that all items listed below are included in your package:
- 1 x Four-channel UHF Wireless Receiver
- 4 x Headset Microphones
- 4 x Beltpack Transmitters
- 1 x AC-DC Power Adapter
- 1 x 1/4" Audio Cable
- User Manual (this document)
Components Overview
Familiarize yourself with the receiver's rear panel connections:

This image displays the rear panel of the Bolymic BL-4200SB-4HS32 receiver. From left to right, it features Antenna D, XLR Output D, XLR Output C, Antenna C, Mix output (1/4 inch), Antenna B, XLR Output B, XLR Output A, Antenna A, and Power Input (DC 12-18V).
Setup Instructions
- Unpack Components: Carefully remove all components from the packaging.
- Connect Antennas: Screw the four antennas (A, B, C, D) securely into their corresponding ports on the rear of the receiver. Ensure they are positioned vertically for optimal signal reception.
- Connect Power: Connect the supplied AC-DC power adapter to the receiver's Power Input port and then plug it into a suitable electrical outlet.
- Connect Audio Outputs:
- For individual channel control, connect XLR cables from the receiver's XLR Output A, B, C, and D to the corresponding input channels on your audio mixer or amplifier.
- Alternatively, for a combined output, connect a 1/4" audio cable from the receiver's Mix Output to a single input on your audio mixer or amplifier.
- Prepare Transmitters: Open the battery compartment on each beltpack transmitter and insert two fresh AA batteries, observing correct polarity. Close the compartment securely.
- Connect Headset Microphones: Plug each headset microphone into the input jack on its respective beltpack transmitter.
- Power On: Turn on the power switch on the receiver. The LCD display should illuminate. Then, turn on each beltpack transmitter.
- Synchronize Channels: The system features automatic transmitter setup. Follow the instructions on the receiver's display or refer to the quick start guide for specific steps to synchronize the transmitter and receiver channels. Ensure each transmitter is paired with a unique receiver channel.
Operating Instructions
- Power On/Off: Use the power buttons on the receiver and each beltpack transmitter to turn the units on or off. Always power on the receiver before the transmitters and power off transmitters before the receiver.
- Channel Selection: The receiver's backlit LCD display shows RF level, AF level, Channel Frequency, and mute status. If interference is encountered, you can select a different frequency for each channel. Refer to the receiver's controls for changing channels and re-synchronizing with the transmitters.
- Volume Control: The receiver has individual volume controls for each of the four channels (A, B, C, D). Adjust these to achieve the desired audio level for each microphone. Also, adjust the input gain on your mixer/amplifier as needed.
- Microphone Placement: Position the headset microphone securely on the user's head, ensuring the microphone element is close to the mouth (typically 1-2 inches) to capture clear audio and minimize background noise.
- Range: Maintain the operating distance within the specified range of up to 300 feet (80 meters) for optimal performance. Obstacles and other wireless devices can affect range and signal stability.
Maintenance
- Battery Replacement: Replace AA batteries in the beltpack transmitters when the low battery indicator appears or when performance degrades. Always use fresh, high-quality batteries.
- Cleaning: Use a soft, dry cloth to clean the receiver, transmitters, and microphones. Do not use liquid cleaners or solvents, as they may damage the components.
- Storage: When not in use for extended periods, remove batteries from the transmitters and store the system in a cool, dry place away from direct sunlight and extreme temperatures.
- Antenna Care: Ensure antennas are not bent or damaged. Proper antenna orientation is crucial for signal integrity.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Receiver or transmitter not powered on; low/dead batteries; incorrect cable connections; receiver volume too low; mixer input issues. | Ensure all units are powered on. Replace transmitter batteries. Check all audio and power cable connections. Increase receiver channel volume and mixer input gain. |
| Interference or signal dropouts | Operating outside range; other wireless devices on same frequency; environmental interference; improper antenna placement. | Reduce distance between transmitter and receiver. Select a different operating frequency for the affected channel. Ensure antennas are unobstructed and positioned correctly. Avoid strong electromagnetic fields. |
| Poor sound quality (e.g., distorted, weak) | Microphone too far from mouth; incorrect gain settings; damaged microphone/cable. | Adjust headset microphone closer to the user's mouth. Adjust receiver volume and mixer input gain. Inspect microphone and cable for damage. |
| Transmitter not synchronizing with receiver | Incorrect synchronization procedure; transmitter too far from receiver during sync. | Repeat the automatic synchronization process, ensuring the transmitter is close to the receiver. Refer to the specific synchronization steps in the quick start guide. |
Specifications
- Model: BL-4200SB-4HS32
- Frequency Range: UHF 530MHz - 580MHz
- Frequency Response: 45Hz~18KHz
- Channels: 4 x 100 Selectable Frequencies
- Outputs: 4 x XLR Individual Outputs, 1 x 1/4" Mixed Output
- Operating Range: Up to 300 feet (80 meters) (line of sight)
- Transmitter Battery Life: Approximately 12 Hours (with AA batteries)
- Receiver Power Source: AC-DC Adapter (Corded Electric)
- Material: Metal (Receiver)
- Item Weight: 13.2 pounds (System)
- UPC: 699948731253
Warranty and Support
For warranty information, technical assistance, or customer support regarding your Bolymic BL-4200SB-4HS32 wireless microphone system, please contact your original retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.





