1. Introduction
Thank you for choosing the SHIDU S512 Portable Voice Amplifier. This device is designed to provide clear and powerful voice amplification, making it ideal for teachers, tour guides, coaches, presenters, and anyone who needs to project their voice to a group. Its compact size, lightweight design, and long-lasting battery ensure convenience and reliability. Please read this manual carefully to understand the features and proper operation of your new voice amplifier.
Image 1.1: SHIDU S512 Portable Voice Amplifier in use by a teacher.
2. Package Contents
Please check the box for the following items:
- 1 x SHIDU S512 Main Voice Amplifier Unit
- 1 x Adjustable Waistband
- 1 x Wired Headset Microphone
- 1 x 3.5mm AUX Audio Input Cable
- 1 x USB Charging Cable
- 1 x User Manual
Image 2.1: Contents of the SHIDU S512 package.
3. Product Overview: Controls and Ports
Familiarize yourself with the various controls and ports on your SHIDU S512 voice amplifier:
Image 3.1: SHIDU S512 Controls and Ports Diagram.
- Power Switch/Volume Control: Rotate to turn the device ON/OFF and adjust the volume.
- MIC Port: Connect the wired headset microphone here.
- AUX Port: Connect external audio sources (e.g., phone, computer) using the 3.5mm AUX cable.
- DC 5V Charging Port: Connect the USB charging cable for recharging the device.
- USB Port: Insert a USB flash drive for music playback.
- TF Card Slot: Insert a TF (MicroSD) card for music playback.
- Mode Button (M): Press to switch between different input modes (Microphone, USB, TF Card, AUX).
- Previous/Next Buttons: Used for navigating tracks during music playback.
- Play/Pause Button: Used to play or pause music playback.
- Indicator Lights: Display charging status (Red blinks for low power/charging, Red on for fully charged) and operating status (Blue blinks for music playing, Blue on for working, Yellow on for MIC mode).
4. Setup
- Charge the Device: Before first use, fully charge the amplifier. Connect the USB charging cable to the DC 5V port on the amplifier and the other end to a USB power adapter (not included) or a computer USB port. The red indicator light will blink during charging and turn solid red when fully charged.
- Connect the Microphone: Insert the 3.5mm plug of the wired headset microphone into the MIC port on the amplifier.
- Wear the Microphone: Position the headset microphone comfortably on your head, ensuring the microphone capsule is close to your mouth (within 1-2 cm) for optimal voice pickup. The microphone is adjustable up to 270 degrees.
- Wear the Amplifier: Use the adjustable waistband to wear the amplifier around your waist, or clip it to your belt. Alternatively, you can use the built-in hooks to hang it around your neck with a lanyard (not included).
Image 4.1: SHIDU S512 amplifier highlighting its 2000mAh battery.
5. Operating Instructions
- Power On/Off: Rotate the Power Switch/Volume Control clockwise to turn the amplifier ON. Rotate counter-clockwise until it clicks to turn OFF.
- Adjust Volume: After turning on, continue rotating the Power Switch/Volume Control clockwise to increase the volume. Rotate counter-clockwise to decrease the volume. Start with a low volume and gradually increase to avoid feedback.
- Voice Amplification: With the microphone connected and the device powered on, speak into the microphone. Your voice will be amplified through the speaker. The yellow indicator light will be on in MIC mode.
- Music Playback (USB/TF Card):
- Insert a USB flash drive into the USB port or a TF card into the TF card slot.
- Press the 'M' (Mode) button to switch to USB or TF card mode. The blue indicator light will blink during music playback.
- Use the Previous/Next buttons to skip tracks and the Play/Pause button to control playback.
- AUX Input:
- Connect your external audio device (e.g., smartphone, MP3 player) to the AUX port using the 3.5mm AUX cable.
- Press the 'M' (Mode) button to switch to AUX mode.
- Control music playback from your connected device.
Image 5.1: SHIDU S512 amplifier with multiple input options.
6. Charging
The SHIDU S512 features a built-in 2000mAh rechargeable lithium battery.
- Charging Time: A full charge typically takes 3-5 hours.
- Battery Indicator: The red indicator light blinks during charging and turns solid red when the battery is fully charged.
- Operating Time: On a full charge, the amplifier provides approximately 12-18 hours of voice amplification (at 50% volume) or 6-8 hours of music playback.
- Low Battery Warning: When the battery is low, the red indicator light will blink rapidly. Please recharge the device promptly.
7. Specifications
| Output Power | 15W |
| Battery Capacity | 2000mAh Lithium Battery |
| Charging Voltage | DC 5V, 500mA |
| Working Time (Microphone Mode) | 12-18 hours (at 50% volume) |
| Working Time (Music Mode) | 6-8 hours |
| Charging Time | 3-5 hours |
| Sound Coverage | Up to 25,000 sq.ft |
| Product Dimensions | 98mm x 88mm x 43mm (approx. 3.86 x 3.46 x 1.69 inches) |
| Unit Weight | Approx. 0.4 lbs (180g) |
| Connectivity Technology | Wired |
| Compatible Devices | Headset, Laptop |
8. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. If storing for a long period, charge the battery to about 50% every 3 months.
- Avoid Water: This device is not waterproof. Keep it away from water and moisture.
9. Troubleshooting
- No Sound:
- Ensure the device is powered on and the volume is turned up.
- Check if the microphone is securely plugged into the MIC port.
- Verify that the correct mode (e.g., MIC, USB, AUX) is selected using the 'M' button.
- Ensure the microphone is positioned correctly near your mouth.
- Feedback/Squealing Sound:
- Reduce the volume.
- Increase the distance between the microphone and the amplifier speaker.
- Adjust the angle of the microphone away from the speaker.
- Avoid pointing the microphone directly at the speaker.
- Device Not Charging:
- Ensure the USB charging cable is properly connected to both the amplifier and the power source.
- Try a different USB charging cable or power adapter.
- Check if the charging indicator light is functioning (blinking red).
- Short Battery Life:
- Ensure the device is fully charged before use.
- High volume levels or continuous music playback will consume battery faster.
- Battery performance may degrade over time with extensive use.
10. Warranty and Support
SHIDU products are manufactured with high-quality standards. For any technical support or warranty inquiries, please refer to the contact information provided with your purchase or visit the official SHIDU website. Keep your purchase receipt as proof of purchase for warranty claims.
