1. Introduction
Thank you for choosing the Agatige MA-2S Stereo Audio Preamplifier and Headphone Amplifier. This compact device is designed to amplify microphone and audio signals, offering versatile output options for various audio setups. Please read this manual carefully to ensure proper installation and operation.
2. Product Overview
The Agatige MA-2S is a mini stereo audio preamplifier and headphone amplifier. It features inputs for dynamic and condenser microphones, as well as a stereo audio input. The device allows for separate or mixed output of amplified microphone and music signals through three output ports, one of which can directly drive headphones.
Figure 1: Agatige MA-2S Stereo Audio Preamplifier and Headphone Amplifier with included audio cables.
3. Features
- Three Output Ports: Amplified microphone and music signals can be output separately or mixed. One mixed output port can directly drive headphones.
- Anti-Interference Design: The robust aluminum casing provides strong anti-interference capabilities, ensuring lossless signal transmission.
- Wide Device Compatibility: The 3.5mm interface supports electret and common condenser microphones. The 6.5mm interface is for dynamic microphones, compatible with both wired and wireless types.
- Effective Audio Amplification: Amplifies 6.5mm dynamic microphone input by 75 times, 3.5mm condenser microphone input by 22 times, and 3.5mm stereo music input by 5 times.
- Compact and Portable: Small size for easy transport and use in various audio amplification scenarios without compromising sound quality.
4. Package Contents
Please check the package for the following items:
- 1 x Agatige MA-2S Stereo Audio Preamplifier
- 2 x Audio Cables
5. Setup
Follow these steps to set up your Agatige MA-2S preamplifier:
- Connect Power: Connect a DC 12V power adapter (not included) to the DC 5.5 x 2.1mm power connector on the unit. Ensure you use a high-quality, low-ripple power supply to prevent humming.
- Connect Microphones:
- For dynamic microphones, use the 6.5mm 'mic' input jack.
- For electret or condenser microphones, use the 3.5mm 'mic' input jack.
- Connect Audio Input: For stereo music input, connect your audio source (e.g., smartphone, MP3 player) to the 'audio in' 3.5mm jack.
- Connect Audio Output:
- Use the 'audio out' 3.5mm jack for amplified music output.
- Use the 'mic out' 3.5mm jack for amplified microphone output.
- The 'out' 3.5mm jack provides a mixed output of both microphone and music, and can directly drive headphones.
Figure 2: DC 12V Power Connector (approx. 5.5 x 2.1 mm).
Figure 3: Rear panel connections including audio in, audio out, mic out, mixed out, and DC 12V power input.
6. Operating Instructions
Once all connections are made, operate the device as follows:
- Power On: Ensure the power adapter is connected to a power outlet. The unit will power on automatically.
- Adjust Microphone Volume: Use the 'mic vol' knob on the front panel to adjust the amplification level of the microphone input.
- Adjust Audio Volume: Use the 'audio vol' knob on the front panel to adjust the amplification level of the stereo music input.
- Monitor Output: If using headphones, connect them to the 'out' jack and adjust the 'mic vol' and 'audio vol' knobs to achieve the desired mix and listening level.
Figure 4: Front panel with 'mic vol' and 'audio vol' control knobs.
7. Specifications
| Item Type | Small Stereo Audio Preamplifier |
| Material | ABS and Aluminum |
| Dynamic Microphone Interface | 6.5 mm |
| Condenser Microphone Interface | 3.5 mm |
| Power Supply | DC 12V |
| Power Connector | Approx. 5.5 x 2.1 mm / 0.2 x 0.1 inches |
8. Troubleshooting
- Humming Noise: If you experience a humming noise, ensure you are using a high-quality, low-ripple DC 12V power supply. Poor quality power supplies can introduce unwanted noise.
- No Audio Output:
- Check all cable connections to ensure they are secure.
- Verify that the power adapter is correctly connected and receiving power.
- Adjust the 'mic vol' and 'audio vol' knobs to appropriate levels.
- Ensure your input sources (microphones, audio players) are functioning correctly.
- Distorted Audio:
- Reduce the input volume from your source devices.
- Lower the 'mic vol' or 'audio vol' knobs on the preamplifier.
9. Maintenance
To ensure the longevity and optimal performance of your Agatige MA-2S preamplifier:
- Keep the device in a dry environment, away from moisture and extreme temperatures.
- Clean the exterior with a soft, dry cloth. Do not use liquid cleaners or solvents.
- Avoid dropping or subjecting the device to strong impacts.
- Disconnect the power supply when the device is not in use for extended periods.
10. Warranty and Support
This product comes with a standard manufacturer's warranty. For warranty claims or technical support, please contact your retailer or the Agatige customer service department. Please retain your proof of purchase for any warranty-related inquiries.
