1. Introduction
Image: The MIPRO ACT-311 receiver (bottom) and ACT-32T bodypack transmitter (top) with antennas.
The MIPRO ACT-311/ACT-32T Single-Channel Bodypack Wireless System is designed for professional audio applications, offering reliable wireless transmission and high-quality sound. This system comprises an ACT-311 single-channel receiver and an ACT-32T bodypack transmitter, ideal for use with lavalier microphones or instrument connections. This manual provides essential information for the proper setup, operation, and maintenance of your wireless system to ensure optimal performance and longevity.
2. Setup
2.1 Unpacking and Inspection
Carefully unpack all components and inspect them for any signs of damage. If any item is missing or damaged, contact your dealer immediately.
2.2 Component Identification
- ACT-311 Receiver: The main unit that receives audio signals from the transmitter.
- ACT-32T Bodypack Transmitter: Worn by the user, connects to a microphone or instrument.
- Antennas: For signal reception on the ACT-311 receiver.
- Power Adapter: For the ACT-311 receiver.
- Audio Cable: For connecting the receiver to a mixer or amplifier.
2.3 ACT-311 Receiver Setup
- Connect Antennas: Screw the two included antennas onto the ANTENNA A and ANTENNA B connectors on the rear panel of the ACT-311 receiver. Ensure they are securely tightened.
- Connect Power: Plug the DC power adapter into the DC IN jack on the rear panel of the receiver, then plug the adapter into an AC power outlet.
- Connect Audio Output: Connect the receiver's audio output (XLR or 1/4" jack) to the input of your mixer, amplifier, or audio interface using an appropriate audio cable.
- Positioning: Place the receiver in a location free from obstructions and away from other wireless devices or strong electromagnetic fields.
2.4 ACT-32T Bodypack Transmitter Setup
- Install Batteries: Open the battery compartment of the ACT-32T transmitter and insert two fresh AA alkaline batteries, observing the correct polarity (+/-).
- Connect Microphone/Instrument: Plug your lavalier microphone or instrument cable into the 4-pin mini XLR input jack on the top of the bodypack transmitter. Ensure the connector is fully seated.
- Secure Transmitter: Attach the bodypack transmitter to your belt or clothing using the integrated clip.
3. Operating Instructions
3.1 Powering On/Off
- Receiver (ACT-311): Press the POWER button on the front panel to turn the unit on or off. The display will illuminate.
- Transmitter (ACT-32T): Press and hold the POWER button on the bodypack until the display illuminates to turn it on. Press and hold again to turn it off.
3.2 Frequency Synchronization (ACT Sync)
The ACT (Automatic Channel Targeting) function allows the receiver to automatically synchronize the transmitter's frequency. This is crucial for establishing a stable wireless connection.
- Power On Both Units: Ensure both the ACT-311 receiver and ACT-32T transmitter are powered on.
- Select Channel on Receiver: Use the UP/DOWN buttons on the ACT-311 receiver to select the desired operating channel.
- Activate ACT Sync: Press the ACT button on the ACT-311 receiver. The ACT indicator on the receiver's display will flash.
- Align IR Ports: Position the IR (Infrared) port on the ACT-32T bodypack transmitter (usually located near the display) within 30 cm (12 inches) of the IR port on the ACT-311 receiver (usually on the front panel).
- Confirm Synchronization: The transmitter's display will show the new synchronized frequency, and the receiver's ACT indicator will stop flashing, indicating successful synchronization.
3.3 Adjusting Audio Levels
- Receiver Output Level: Adjust the VOLUME knob on the ACT-311 receiver to control the audio output level sent to your mixer or amplifier. Start with a moderate level.
- Transmitter Gain: The ACT-32T bodypack transmitter may have an internal gain adjustment. Refer to the specific transmitter's detailed manual for precise adjustment of microphone input sensitivity to prevent distortion.
3.4 Using the Display
Both the receiver and transmitter feature LCD displays that provide critical information:
- Receiver Display: Shows channel/frequency, RF signal strength, AF audio level, battery status of the transmitter, and ACT sync status.
- Transmitter Display: Shows channel/frequency, battery status, and gain settings.
4. Maintenance
4.1 Cleaning
Wipe the surfaces of the receiver and transmitter with a soft, dry cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish or internal components.
4.2 Battery Care (ACT-32T)
- Remove batteries from the transmitter if it will not be used for an extended period to prevent leakage and damage.
- Use high-quality alkaline or rechargeable AA batteries.
- Replace batteries when the low battery indicator appears on the transmitter's display or the receiver's display.
4.3 Storage
Store the system in a cool, dry place, away from direct sunlight, extreme temperatures, and high humidity. Protect the antennas from bending or damage during storage and transport.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No Sound | Transmitter off or low battery; Receiver off; Incorrect frequency; Audio cable disconnected; Mixer/amplifier input issues. | Ensure both units are on; Check/replace transmitter batteries; Perform ACT sync; Verify audio cable connections; Check mixer/amplifier settings. |
| Poor Sound Quality / Interference | Interference from other wireless devices; Too far from receiver; Obstructions; Low transmitter battery; Incorrect gain setting. | Change operating frequency; Reduce distance between transmitter and receiver; Remove obstructions; Replace batteries; Adjust transmitter gain. |
| No Power | Power adapter disconnected (receiver); Dead batteries (transmitter). | Check power adapter connection and outlet; Replace transmitter batteries. |
| ACT Sync Fails | IR ports not aligned; Too far apart; Obstruction between ports. | Ensure direct line of sight and close proximity (within 30 cm) between IR ports. |
6. Specifications
| Feature | Description |
|---|---|
| Model Name | ACT-311 (Receiver) / ACT-32T (Transmitter) |
| Connectivity Technology | Wireless |
| Color | Black |
| Manufacturer | MIPRO |
| Item Weight | 6 pounds (System) |
| Control Method | Remote (ACT Sync) |
| Compatible Devices | Audio Receivers, Mixers |
| Specific Uses For Product | Professional Audio |
7. Warranty and Support
MIPRO products are manufactured to high-quality standards and are backed by a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official MIPRO website.
For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact your authorized MIPRO dealer or MIPRO customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
