MAOZUA AK380/AK370/AK170 Series Home/Car HiFi Power Amplifier User Manual

1. Introduction

The MAOZUA AK380/AK370/AK170 series are versatile Class D power amplifiers designed for both home and car audio systems. They feature multiple input options including USB, SD card, AUX, and Bluetooth connectivity, providing a flexible solution for your audio needs. With bass and treble controls, you can fine-tune your sound experience.

Image: MAOZUA AK380 Amplifier showcasing its features and included remote.

2. Safety Information

• Ensure the power supply matches the device's requirements (DC 12V/2A-5A).
• Do not expose the device to rain, moisture, or extreme temperatures.
• Avoid placing the device near heat sources or in direct sunlight.
• Do not open the casing; refer servicing to qualified personnel.
• Keep out of reach of children.
• Disconnect power before making any connections or disconnections.

3. Package Contents

Please check the package for the following items:

• MAOZUA Power Amplifier (AK380, AK370, or AK170 model)
• Remote Controller (for AK380/AK390 models)
• Radio Antenna (for AK380/AK390 models)
• User Manual (this document, or a printed version)

Note: A 12V power adapter is typically not included and must be purchased separately.

Image: Contents of the package including the amplifier, remote, and manual.

4. Product Overview

4.1 Front Panel Description (AK380/AK390)

Diagram: Front panel controls of the AK380/AK390 amplifier.

1. MP3 Function Buttons:
   • MODE: Signal input conversion (USB, SD, BT.C, FM, AUX).
   • Single tune circulation / Last song / Next song: Control playback.
   • Play/Pause: In MP3 state, to play or pause. In FM state, click to automatically search for radio stations.
2. Power Switch: ON/OFF for DC 12V power.
3. Bass Control Knob: Adjust bass levels.
4. Treble Control Knob: Adjust treble levels.
5. Total Volume Control Knob: Adjust overall volume.
6. USB Port: For USB drive input.
7. SD Card Slot: For SD/MMC card input.
8. Digital Display: Shows current mode, track number, or FM frequency.

4.2 Rear Panel Connections (AK380/AK390)

Diagram: Rear panel connections of the AK380/AK390 amplifier.

1. Audio Input Interface: Lotus (RCA) audio input ports and 3.5mm AUX input port.
2. FM.ANT: Radio antenna connection (for AK380/AK390).
3. Right Channel Speaker Output: Red and black clips for right speaker.
4. Left Channel Speaker Output: Red and black clips for left speaker.
5. POWER: DC 12V/2A-5A input jack.

4.3 AK170 Model Overview

Image: AK170 Mini Power Amplifier, a compact version.

The AK170 model is a more compact amplifier, typically without Bluetooth functionality. It features similar basic controls for volume, bass, and treble, and operates on DC 12V. It is ideal for car use or smaller home setups.

5. Specifications

Image: Dimensions of the AK380 amplifier.

6. Setup Instructions

6.1 Connecting Speakers

1. Ensure the amplifier is turned OFF and disconnected from power.
2. Connect your passive speakers to the Left and Right channel speaker output clips on the rear panel. Ensure correct polarity (red to red, black to black).
3. For optimal performance, use speakers with an impedance matching the amplifier's specifications (typically 4-8 ohms).

6.2 Connecting Audio Sources

• AUX Input: Connect your audio device (e.g., phone, tablet, TV) to the 3.5mm AUX input or RCA (Lotus) audio input ports on the rear panel using an appropriate audio cable.
• USB/SD Card: Insert a USB drive or SD/MMC card into the respective slots on the front panel.
• Bluetooth (AK380/AK370): See Section 7.2 for Bluetooth connection instructions.
• FM Radio (AK380/AK370): Connect the provided radio antenna to the FM.ANT port on the rear panel for improved reception.

6.3 Power Connection

1. Connect a DC 12V/2A-5A power adapter (not included) to the POWER input jack on the rear panel.
2. Plug the power adapter into a suitable wall outlet (110V or 220V AC, depending on your adapter).
3. Alternatively, for car use, connect the 12V power input directly to a 12V car battery, ensuring correct polarity.

7. Operating Instructions

7.1 Basic Operation

1. Power On/Off: Use the Power switch on the front panel to turn the amplifier ON or OFF.
2. Volume Control: Rotate the 'VOLUME' knob to adjust the overall sound level.
3. Tone Control: Use the 'BASS' and 'TREBLE' knobs to adjust the low and high frequencies of the audio.
4. Mode Selection: Press the 'MODE' button to cycle through input sources: USB, SD, Bluetooth (BT.C), FM, AUX. The digital display will show the current mode.

7.2 Bluetooth Connection (AK380/AK370)

1. Press the 'MODE' button on the amplifier's front panel until 'BT.C' or 'BLUE' is displayed, indicating Bluetooth playback mode.
2. On your smartphone or Bluetooth-enabled device, go to Bluetooth settings and turn on Bluetooth.
3. Search for available devices. The amplifier will appear as 'BT.C' or a similar name.
4. Select the amplifier from the list to connect. Once connected, you will hear an audible 'beep' confirmation.
5. You can now play music from your device. Volume, track selection (last/next song), and play/pause can be controlled from both your device and the amplifier's front panel/remote.
6. If a phone call comes in while playing Bluetooth music, the device will pause immediately. To switch the Bluetooth mode off for phone calls, you can switch the Bluetooth mode on the phone to the receiver.

7.3 Remote Controller (AK380/AK390)

The remote controller provides convenient access to various functions:

• Power Button: Standby/Power On/Off.
• Mode Button: Switch input sources.
• Playback Controls: Play/Pause, Next Song, Previous Song, Single Tune Circulation, Total Repeat.
• Volume Control: Volume Up/Down.
• FM Radio Controls: Last Station Selection, FM Frequency Control (backward/forward), Automatic Search.
• EQ Button: Cycle through built-in equalizer effects (if available).
• Numeric Keys (0-9): Directly select songs (MP3) or radio stations (FM). For example, pressing '1' then '2' will select track 12.

8. Maintenance

• Clean the device with a soft, dry cloth. Do not use liquid cleaners or aerosols.
• Keep ventilation openings clear to prevent overheating.
• Store the amplifier in a cool, dry place when not in use for extended periods.

9. Troubleshooting

• No Sound Output:
  • Check all speaker connections for proper polarity and secure fit.
  • Ensure the power adapter is correctly connected and supplying 12V.
  • Verify the input source is selected correctly (MODE button).
  • Increase the volume on both the amplifier and the audio source device.
  • Test with a different audio source or speakers to isolate the problem.
• Bluetooth Connection Issues:
  • Ensure the amplifier is in Bluetooth mode ('BT.C' or 'BLUE' displayed).
  • Make sure Bluetooth is enabled on your source device and it's within range.
  • Forget the device from your phone's Bluetooth list and try pairing again.
  • Restart both the amplifier and your source device.
• Poor Sound Quality/Distortion:
  • Check audio cables for damage or loose connections.
  • Ensure speaker impedance matches the amplifier's requirements.
  • Reduce the volume if distortion occurs at high levels.
  • Adjust Bass and Treble controls.
• Remote Control Not Working:
  • Check and replace the battery in the remote control.
  • Ensure there are no obstructions between the remote and the amplifier's IR receiver.

10. User Tips

• This amplifier is known for its powerful output and minimal distortion, offering a great audio experience.
• The initial setup is generally straightforward; just connect your speakers and power, then select your audio source.
• Consider using a high-quality 12V power adapter (2A-5A) for stable performance, especially if you plan to use it at higher volumes.
• When connecting to a car battery, always double-check the polarity to prevent damage.

11. Frequently Asked Questions (FAQ)

Q: What type of device is this?

A: This is a Home Digital Amplifier, suitable for both home and car audio setups.

Q: What is the power output?

A: The maximum power per channel is 90W (peak). Please note that advertised '800W' often refers to peak power, not RMS (Root Mean Square) power.

Q: Is a power adapter included?

A: Typically, the 12V power adapter is not included and needs to be purchased separately. Ensure it provides DC 12V with 2A-5A current.

Q: Can I connect it to a 12V car battery?

A: Yes, the amplifier is designed to operate on DC 12V and can be connected directly to a 12V car battery. Ensure correct polarity.

Q: Can I connect a turntable with RCA output?

A: Yes, the amplifier has RCA (Lotus) audio input ports, making it compatible with turntables that have RCA output.

Q: Does the Bluetooth connection require a password?

A: No, the Bluetooth connection typically does not require a password. Simply select the device from your phone's Bluetooth list to pair.

Q: What kind of speakers can I use?

A: You can use passive speakers with an impedance of 4-8 ohms. Ensure the speakers can handle the amplifier's power output (e.g., 90W or higher per channel).

12. Warranty and Support

For warranty information and technical support, please refer to the seller's policies or contact the retailer where you purchased the product. Keep your purchase receipt as proof of purchase.

For additional resources, you may find the official PDF user manual helpful: View User Manual (PDF)