Sennheiser XSW 1-835-A UHF Vocal Set User Manual
Model: 4330236725
1. Overview
The Sennheiser XSW 1-835-A UHF Vocal Set is an integrated wireless system designed for vocalists and presenters. It is suitable for various audio capture applications including live sound, stage performances, and theatrical productions. This system provides reliable wireless audio transmission with ease of use.
The complete package includes the core wireless microphone system along with essential accessories to enhance performance and usability.
Package Contents:
- Sennheiser XSW 1-835-A UHF Vocal Set with e835 Dynamic Microphone (A: 548 to 572 MHz)
- MZQ1 Microphone Clamp
- NT12-5 CW Power Supply (for receiver)
- 2 x AA Batteries (for transmitter)
- Auray WHF-158 Foam Windscreen for 1-5/8" Diameter Microphones
- Watson 4-Hour Rapid Charger with 4 AA NiMH Rechargeable Batteries (2300mAh)

Figure 1: Complete Sennheiser XSW 1-835-A UHF Vocal Set with included accessories. This image displays the EM-XSW 1 UHF receiver, the e835 handheld transmitter, an Auray foam windscreen, and the Watson 4-hour rapid charger with four AA NiMH rechargeable batteries.
2. Setup Guide
Follow these steps to set up your Sennheiser XSW 1-835-A UHF Vocal Set for optimal performance.
2.1 Receiver Setup (EM-XSW 1 UHF Receiver)
- Power Connection: Connect the NT12-5 CW Power Supply to the receiver's power input and then to a suitable power outlet.
- Antenna Connection: Ensure the antennas are securely connected to the receiver. The system utilizes antenna-switching diversity reception for stable signal.
- Audio Output: Connect the receiver's audio output (XLR connector) to your audio mixer or sound system using an appropriate cable.

Figure 2: The Sennheiser EM-XSW 1 UHF receiver and the e835 handheld microphone. The receiver features a digital display and control buttons for frequency management and synchronization.
2.2 Transmitter Setup (e835 Handheld Microphone)
- Battery Installation: Open the battery compartment of the e835 handheld microphone. Insert the two supplied AA batteries, ensuring correct polarity. For extended use, utilize the provided Watson rechargeable AA NiMH batteries after charging them with the Watson 4-Hour Rapid Charger.
- Microphone Clamp: Attach the MZQ1 Microphone Clamp to a microphone stand and secure the e835 microphone in the clamp.
- Windscreen Application: If desired, place the Auray WHF-158 Foam Windscreen over the microphone capsule to reduce plosives and wind noise.

Figure 3: The Auray WHF-158 Foam Windscreen, designed to fit 1-5/8" diameter microphones like the Sennheiser e835, helps reduce unwanted noise.
2.3 System Synchronization
The XSW 1-835-A features automatic frequency management and a remote channel for easy setup:
- Power on both the receiver and the transmitter.
- Use the receiver's scan function to find an available, interference-free frequency.
- Utilize the synchronization feature (often a "Sync" button on the receiver) to automatically transfer the selected frequency to the handheld transmitter. Refer to the receiver's display for confirmation.
3. Operating Instructions
3.1 Powering On/Off
- Receiver: Press the power button on the EM-XSW 1 receiver. The display will illuminate.
- Transmitter: Press and hold the power button on the e835 handheld microphone until the display activates.
- To power off, press and hold the respective power buttons until the devices shut down.
3.2 Adjusting Audio Levels
- Adjust the output level on the EM-XSW 1 receiver to match the input sensitivity of your audio mixer.
- Fine-tune the microphone gain on your audio mixer to achieve optimal sound quality without distortion.
3.3 Performance Tips
- Maintain line-of-sight between the transmitter and receiver antennas for best signal integrity.
- Avoid placing the receiver near large metal objects or other wireless devices that could cause interference.
- Regularly check the battery indicator on the handheld microphone to ensure sufficient power during use.
4. Maintenance
4.1 Cleaning
- Microphone: Wipe the microphone body with a soft, dry cloth. For the grille, gently remove any debris. The foam windscreen can be carefully removed and cleaned with mild soap and water, then allowed to air dry completely before reattaching.
- Receiver: Use a soft, dry cloth to clean the receiver's surface. Avoid using abrasive cleaners or solvents.
4.2 Battery Care
- Always remove batteries from the transmitter if it will not be used for an extended period to prevent leakage.
- When using the Watson 4-Hour Rapid Charger, follow its instructions for charging the NiMH rechargeable batteries. Ensure batteries are fully charged before important events.
- Dispose of used batteries responsibly according to local regulations.
5. Troubleshooting
If you encounter issues with your Sennheiser XSW 1-835-A system, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or weak signal |
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| Static or interference (noise) |
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| Microphone not responding |
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6. Specifications
| Feature | Detail |
|---|---|
| Brand | Sennheiser |
| Model Number | 4330236725 |
| ASIN | B074SZL718 |
| UPC | 686924564844 |
| Connectivity Technology | UHF |
| Frequency Response | 548 MHz (A band: 548 to 572 MHz) |
| Signal-to-Noise Ratio | 73 dB |
| Number of Channels | 1 (system supports multiple selectable frequencies) |
| Microphone Form Factor | Handheld (e835 dynamic capsule) |
| Polar Pattern | Unidirectional |
| Power Source | Battery Powered (AA batteries) |
| Connector Type | XLR (receiver output) |
| Item Weight | 3.74 pounds (total package) |
| Package Dimensions | 13.75 x 13.5 x 4.5 inches |
| Date First Available | August 14, 2017 |
7. Warranty and Support
7.1 Warranty Information
- Sennheiser XSW 1-835-A UHF Vocal Set: Limited 2-Year Warranty.
- Watson 4-Hour Rapid Charger with 4 AA NiMH Rechargeable Batteries: Limited 1-Year Warranty.
For detailed warranty terms and conditions, please refer to the warranty card included in your product packaging.
7.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact Sennheiser customer support. You can find more information and support resources on the official Sennheiser website or their Amazon Brand Store.
Visit the Sennheiser Store on Amazon for product information and support.