Introduction
The CAROL Sigma-plus3 is a dynamic supercardioid vocal microphone designed to deliver exceptional clarity and robust sound for various applications, including karaoke, singing, and live events. Its advanced features ensure reliable, high-quality audio performance.
- Crystal-Clear Sound: Experience exceptional clarity, capturing every nuance from soft melodies to powerful vocals.
- Silent Switching Technology: Features CAROL’s patented Slide Potentiometer Switch for smooth, noise-free operation, preventing static and feedback.
- Durable Construction: Crafted with a durable zinc alloy body and a reinforced metal grille, designed to withstand regular use.
- Versatile Performance: Adapts seamlessly to various settings, providing reliable, high-quality sound for karaoke nights, seminars, or live performances.
What's in the Box
Carefully unpack your CAROL Sigma-plus3 microphone and ensure all components are present:
- Microphone × 1
- Detachable XLR-to-6.35mm Cable (14.8ft) × 1
- Microphone Holder × 1

Image: The CAROL Sigma-plus3 microphone shown with its detachable XLR-to-6.35mm cable and microphone holder.
Setup
Follow these steps to set up your CAROL Sigma-plus3 microphone:
- Attach Microphone Holder: Secure the included microphone holder to a compatible microphone stand.
- Insert Microphone: Gently place the CAROL Sigma-plus3 microphone into the holder.
- Connect Cable: Plug the XLR end of the detachable cable into the microphone's base. Ensure it clicks securely into place.
- Connect to Audio System: Plug the 1/4-inch (6.35mm) end of the cable into the microphone input of your karaoke machine, PA system, or amplifier.

Image: The CAROL Sigma-plus3 microphone set up on a stand with its cable connected, illustrating a typical stage setup.
Operating Instructions
To ensure optimal performance from your microphone:
- Power On/Off: Use the patented Slide Potentiometer Switch located on the microphone body to turn the microphone ON or OFF. This switch is designed for noise-free operation.
- Polar Pattern: The Sigma-plus3 features a Super Cardioid polar pattern. This design focuses sound pickup directly in front of the microphone, minimizing sound from the sides and rear. This is ideal for isolating vocals and reducing feedback in live settings.
- Optimal Placement: For best results, hold the microphone close to your mouth (1-6 inches) when speaking or singing. Experiment with distance to achieve your desired vocal tone and clarity.

Image: A hand demonstrating the patented Slide Potentiometer Switch on the CAROL Sigma-plus3 microphone.
Maintenance
Proper care will extend the life and performance of your microphone:
- Cleaning: Use a soft, dry cloth to clean the microphone body. For the metal grille, a slightly damp cloth can be used, ensuring no moisture enters the microphone capsule.
- Storage: Store the microphone in a dry, cool place, away from extreme temperatures and humidity. Use a protective pouch or case to prevent scratches and dust accumulation.
- Cable Care: Avoid sharp bends or kinks in the XLR cable. Coil it loosely when storing to prevent damage.
Troubleshooting
If you encounter issues with your CAROL Sigma-plus3, try these solutions:
- No Sound/Low Volume:
- Ensure the microphone's ON/OFF switch is in the 'ON' position.
- Verify that the XLR cable is securely connected to both the microphone and the audio system.
- Check the input volume/gain levels on your connected amplifier, PA system, or karaoke machine.
- Handling Noise: The microphone features a dual shock mount system to minimize handling noise. Ensure you have a firm but not overly tight grip. Avoid rubbing the microphone body or cable during use.
- Feedback (High-pitched squeal):
- Reposition the microphone further away from speakers or monitors.
- Point the microphone away from speakers. The supercardioid pattern helps reject sound from the sides and rear.
- Reduce the overall volume or adjust equalizer settings on your audio system.
- Compatibility with PC: This microphone is primarily designed for Karaoke Machines and PA Systems. For use with a computer, a dedicated XLR to USB audio interface or adapter is typically required (not included). Direct connection to standard computer audio jacks is not supported.
Specifications
| Feature | Detail |
|---|---|
| Type | Dynamic |
| Polar Pattern | Super Cardioid |
| Frequency Response | 16 KHz |
| Impedance | 600 Ohms |
| Signal-to-Noise Ratio | 78 dB |
| Microphone Form Factor | Handheld |
| Material | Zinc |
| Item Weight | 11.3 ounces (320 Grams) |
| Product Dimensions | 2.13 x 2.13 x 7.01 inches |
| Connectivity Technology | XLR |
| Connector Type | 6.35 mm Jack (via included cable) |
| Recommended Uses | Singing |
| Hardware Platform | Karaoke Machine, PA System |
| Special Feature | Dual Shock Mount System, Noise-Free Switching |
Warranty and Support
The CAROL Sigma-plus3 microphone comes with a 12-Month Warranty, reflecting our commitment to durability, reliability, and exceptional sound quality. For any questions, technical support, or warranty claims, please contact CAROL customer service through your retailer or the official CAROL website.