AV-326BT High Power Home Audio Amplifier User Manual

1. Introduction

Thank you for choosing the AV-326BT High Power Home Audio Amplifier. This versatile amplifier is designed for a wide range of audio applications, including home entertainment, car audio systems, and outdoor events. It features Bluetooth connectivity, an integrated EQ equalizer, and karaoke functions with digital echo. This manual provides essential information for safe and efficient use, setup, operation, and maintenance of your amplifier.

2. Safety Information

• **Power Source:** Ensure the amplifier is connected to the correct voltage (12V DC or 220V AC) as indicated on the rear panel. Incorrect voltage can cause damage or fire.
• **Ventilation:** Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
• **Moisture:** Keep the amplifier away from water, moisture, and high humidity environments.
• **Cleaning:** Disconnect power before cleaning. Use a dry, soft cloth. Do not use liquid cleaners or aerosols.
• **Servicing:** Do not attempt to service this product yourself. Refer all servicing to qualified personnel.
• **Placement:** Place the amplifier on a stable, flat surface. Avoid placing it near heat sources or in direct sunlight.

3. Package Contents

Please check the package for the following items:

• AV-326BT Audio Amplifier
• Power Cable (AC)
• Remote Control
• User Manual (this document)

4. Product Overview

4.1 Front Panel Controls

The front panel provides access to all primary controls for audio input, microphone adjustments, and equalization.

Figure 1: Front view of the AV-326BT amplifier.

Figure 2: Detailed view of the front panel controls.

• **MIC1-4 Inputs:** Connect up to four microphones.
• **MIC VOL:** Adjust the overall volume of the microphones.
• **ECHO, DELAY:** Controls for microphone echo effects.
• **TREBLE, MID, BASS (MIC):** Tone controls for microphone audio.
• **EQ Equalizer:** Multi-band graphic equalizer for fine-tuning audio output.
• **LED DISPLAY:** Shows current mode, track information, or FM frequency.
• **SD/MMC CARD, USB:** Ports for media playback.
• **MODE, PREV, PLAY/PAUSE, NEXT:** Media playback controls.
• **INPUT:** Selector for audio sources (Bluetooth, USB, SD/MMC, FM, Line In).
• **MUSIC VOL:** Adjust the overall music volume.
• **POWER Switch:** Turns the amplifier on or off.

4.2 Rear Panel Connections

The rear panel houses all necessary input and output connections for speakers and external audio sources.

Figure 3: Rear view of the AV-326BT amplifier.

• **AUDIO INPUT (L/R):** RCA inputs for connecting external audio devices (e.g., CD player, DVD player).
• **OUTPUT (L/R):** RCA outputs for connecting to other audio equipment.
• **SPEAKER SYSTEM (+/-):** Terminals for connecting passive speakers. Ensure correct polarity.
• **POWER DC 12V/5A INPUT:** DC power input for car or outdoor use.
• **POWER SOURCE 220V-240V 50Hz:** AC power input for home use.
• **ANT:** FM antenna connection.

5. Setup

5.1 Power Connection

• **For AC Power (Home Use):** Connect the provided AC power cable to the "POWER SOURCE 220V-240V 50Hz" input on the rear panel and then to a suitable wall outlet. Ensure the voltage matches your region (European standard 220V, US standard 220V, British standard 220V, Australian regulations).
• **For DC Power (Car/Outdoor Use):** Connect a 12V/5A DC power supply (not included) to the "POWER DC 12V/5A INPUT" on the rear panel. Ensure correct polarity.
• Before connecting power, ensure the POWER switch on the front panel is in the OFF position.

5.2 Speaker Connection

• Connect your passive speakers to the "SPEAKER SYSTEM" terminals on the rear panel.
• Ensure that the positive (+) terminal of the amplifier connects to the positive (+) terminal of the speaker, and the negative (-) terminal of the amplifier connects to the negative (-) terminal of the speaker. Incorrect polarity can result in poor sound quality.
• The amplifier supports speakers with an impedance of 4-16 Ohm.

5.3 Audio Input Connection

• **Line In:** Use RCA cables to connect external audio sources (e.g., TV, DVD player, PC) to the "AUDIO INPUT (L/R)" jacks on the rear panel.
• **FM Antenna:** Connect the FM antenna to the "ANT" terminal on the rear panel for radio reception.

5.4 Microphone Connection

• Plug your microphones into any of the "MIC1-4" input jacks on the front panel.

6. Operating Instructions

6.1 Power On/Off

• After all connections are made, flip the "POWER" switch on the front panel to the ON position. The LED display will illuminate.
• To turn off, flip the "POWER" switch to the OFF position.

6.2 Input Source Selection

• Press the "INPUT" button on the front panel or the remote control to cycle through available audio sources: Bluetooth (BT), USB, SD/MMC, FM Radio, and Line In. The selected source will be shown on the LED display.

6.3 Volume Control

• **MUSIC VOL:** Rotate the "MUSIC VOL" knob to adjust the main music playback volume.
• **MIC VOL:** Rotate the "MIC VOL" knob to adjust the volume of the connected microphones.

6.4 Bluetooth Operation

• Select "BT" as the input source. The LED display will show "BT" or a similar indicator.
• On your mobile device, search for Bluetooth devices and select "AV-326BT" to pair.
• Once paired, you can play audio from your device through the amplifier.

6.5 USB/SD/MMC Playback

• Insert a USB drive or SD/MMC card into the corresponding slot on the front panel.
• The amplifier will automatically switch to USB/SD/MMC mode and begin playback.
• Use the "PREV", "PLAY/PAUSE", and "NEXT" buttons to control playback.

6.6 FM Radio Operation

• Select "FM" as the input source.
• Use the "PLAY/PAUSE" button to initiate an automatic scan for FM stations. The amplifier will save found stations.
• Use the "PREV" and "NEXT" buttons to navigate between saved stations.

6.7 Equalizer (EQ) Adjustment

• Use the sliders on the graphic EQ panel to adjust specific frequency bands for the overall audio output. This allows you to customize the sound to your preference.
• Separate "TREBLE", "MID", and "BASS" knobs are available for microphone tone adjustments.

6.8 Karaoke Function

• Connect your microphones to the MIC inputs.
• Adjust "MIC VOL" to a comfortable level.
• Use the "ECHO" and "DELAY" knobs to add vocal effects for a karaoke experience.

7. Specifications

8. Troubleshooting

• **No Sound:**
  • Ensure the amplifier is powered on and the volume is turned up.
  • Check all audio cable connections (input and speakers) for secure fit and correct polarity.
  • Verify the correct input source is selected (Bluetooth, USB, SD/MMC, FM, Line In).
  • Test with a different audio source or speakers to isolate the problem.
• **Distorted Sound:**
  • Reduce the volume of both the amplifier and the audio source.
  • Check speaker impedance compatibility (4-16 Ohm).
  • Ensure speaker wires are not frayed or shorting.
  • Adjust EQ settings to a neutral position and re-evaluate.
• **Bluetooth Not Connecting:**
  • Ensure the amplifier is in Bluetooth mode.
  • Make sure Bluetooth is enabled on your device and it's within range.
  • Forget the device from your phone's Bluetooth list and try pairing again.
  • Ensure no other device is currently connected to the amplifier via Bluetooth.
• **Microphone Not Working:**
  • Ensure microphones are securely plugged into the MIC inputs.
  • Increase the "MIC VOL" knob.
  • Test with a different microphone if available.

9. Maintenance

• **Cleaning:** Regularly wipe the amplifier's exterior with a soft, dry cloth. Do not use abrasive cleaners, waxes, or solvents.
• **Ventilation:** Periodically check that the ventilation slots are free from dust and debris. Use a soft brush or compressed air to clean if necessary.
• **Storage:** If storing the amplifier for an extended period, disconnect it from power, clean it, and store it in a cool, dry place away from direct sunlight and extreme temperatures.

10. User Tips

• **Speaker Matching:** Always ensure your speakers' impedance matches the amplifier's recommended range (4-16 Ohm) to prevent damage and ensure optimal sound.
• **Cable Quality:** Using good quality audio cables can significantly improve sound clarity and reduce interference.
• **Ventilation is Key:** Proper ventilation is crucial for the longevity of your amplifier. Avoid enclosing it in tight spaces.
• **Start Low:** When connecting new devices or powering on, always start with the volume knobs at a low setting to prevent sudden loud noises that could damage speakers or hearing.

11. Warranty and Support

This product is covered by the standard manufacturer's warranty. For any technical support, warranty claims, or service inquiries, please contact the seller or authorized service center. Please retain your proof of purchase for warranty purposes.