Introduction
This manual provides detailed instructions for the safe and efficient operation of your PROZOR AK-45 Bluetooth 5.0 HiFi Stereo Audio Amplifier. Please read this manual thoroughly before use and retain it for future reference.
Package Contents
- 1 x Audio Amplifier
- 1 x Remote Control
- 1 x Power Cord
- 1 x User Manual
The package includes the AK-45 amplifier unit, a remote control for convenient operation, a power cord, and this user manual.
Important Safety Instructions
- Read all instructions carefully before use.
- Keep this manual for future reference.
- Do not use this apparatus near water or moisture.
- Clean only with a dry cloth.
- Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Only use attachments and accessories specified by the manufacturer.
- Unplug this apparatus during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
- WARNING: There is a plastic insulating piece at the bottom of the remote control that must be removed before use. Otherwise, the remote control will not function.
- WARNING: The remote control must be pointed directly at the amplifier's screen and at a perpendicular angle to function correctly. Operation from an inclined angle may be ineffective. The recommended operating distance for the remote control is within 5 meters.
Product Features
- High-Fidelity Digital Amplifier: 40W + 40W nominal power output, suitable for 4-16 inch passive speakers.
- Bluetooth 5.0 Connectivity: Enables wireless music streaming with a stable connection up to 10 meters. Compatible with smartphones, tablets, and computers.
- LCD Display with Backlight: Provides clear operational status and enhances ease of use in various lighting conditions.
- USB 2.0 and SD Card Input: Supports direct playback of audio files from USB flash drives or SD cards.
- Bass and Treble Control: Dedicated knobs for precise adjustment of low and high-frequency sound levels.
- Remote Control: Allows for convenient adjustment of settings from a distance.
- Dual Microphone Inputs: Equipped with two microphone jacks for karaoke or public address applications.
- FM Radio Function: Integrated FM tuner for radio reception.
The AK-45 amplifier supports multiple input sources including FM radio, USB drives, SD cards, CD/DVD players (via RCA input), and Bluetooth devices.
Setup Guide
1. Connecting Speakers
Connect your passive speakers to the "SPEAKERS OUTPUT" terminals on the rear panel of the amplifier. Ensure correct polarity (+ to + and - to -) for optimal sound. The amplifier is designed for speakers with an impedance of 4-16 ohms.
2. Connecting Audio Sources
RCA Input (CD/DVD, Laptop/Tablet)
Use an RCA cable to connect your CD/DVD player, laptop, or tablet to the "AUDIO INPUT" RCA jacks on the rear panel.
USB/SD Card Input
Insert a USB flash drive or SD card into the respective slots on the front panel. The amplifier will automatically detect and play compatible audio files.
Bluetooth Pairing
- Turn on the amplifier using the power switch.
- Press the "MODE" button on the front panel or remote control until "BLUE" appears on the LCD display, indicating Bluetooth mode.
- Enable Bluetooth on your device (smartphone, tablet, computer).
- Search for "AK-45" in your device's Bluetooth list and select it to pair.
- Once paired, the amplifier will confirm the connection, and you can stream audio wirelessly.
3. Power Connection
Connect the provided power cord to the "AC POWER INPUT" on the rear panel of the amplifier and then to a suitable power outlet.
The rear panel features RCA audio inputs for external devices, speaker output terminals for connecting passive speakers, and the AC power input.
This image illustrates wireless audio streaming via Bluetooth 5.0, showing a smartphone connected to the AK-45 amplifier, with a wireless range of up to 10 meters.
Operating Instructions
Front Panel Controls
The front panel includes controls for power, treble, bass, microphone volume, microphone input jacks, total volume, SD card slot, USB jack, digital display, mode switch, previous/next song, play/pause, and song loop.
- Power Switch: Toggles the unit ON or OFF.
- Treble Control: Adjusts high-frequency sound levels.
- Bass Control: Adjusts low-frequency sound levels.
- Mic Control: Adjusts the volume of connected microphones.
- Mic Jack (MIC1, MIC2): Connect microphones for karaoke or public address.
- Total Volume Control: Adjusts the overall output volume.
- SD Card Slot: Insert an SD card for audio playback.
- USB Jack: Insert a USB flash drive for audio playback.
- Digital Display: Shows current mode, track information, and other status indicators.
- Mode Switch: Cycles through available input modes (Bluetooth, FM, USB, SD, RCA).
- Previous Song: Skips to the previous track in USB/SD/Bluetooth mode.
- Play/Pause: Plays or pauses audio in USB/SD/Bluetooth mode.
- Next Song: Skips to the next track in USB/SD/Bluetooth mode.
- Song Loop: Repeats the current track or playlist.
Remote Control Functions
The remote control provides functions such as power on/off, FM channel switch, track navigation, volume adjustment, single loop, mode selection, EQ switch, and play/pause.
- Power On / Off: Toggles the amplifier's power.
- FM Channel Switch: Changes FM radio channels.
- Next Track: Skips to the next audio track.
- Previous / Next Track: Navigates between tracks.
- Volume + / -: Increases or decreases the volume.
- Single Loop Key: Activates single track repeat.
- Mode Switch: Selects the input source.
- EQ Switch: Cycles through preset equalizer modes.
- Play / Pause: Plays or pauses audio playback.
FM Radio Operation
To operate the FM radio function:
- Switch the amplifier to FM mode using the "MODE" button on the front panel or remote control.
- Use the "Previous Song" and "Next Song" buttons on the front panel or remote control to scan for available radio stations.
Maintenance
- Keep the amplifier clean by wiping it with a soft, dry cloth.
- Do not use liquid cleaners, abrasive cleaners, or aerosol cleaners, as they may damage the finish or internal components.
- Ensure proper ventilation around the unit to prevent overheating. Do not block any vents.
- Avoid exposing the unit to direct sunlight, extreme temperatures, or high humidity.
- If the unit is not used for an extended period, unplug it from the power outlet to conserve energy and prevent potential damage from power surges.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cord not connected securely; Power switch is OFF | Check power cord connection to both the amplifier and the wall outlet; Turn the power switch ON |
| No sound output | Incorrect input mode selected; Volume level too low; Speakers not connected or faulty | Select the correct input mode (Bluetooth, USB, SD, FM, RCA); Increase the Total Volume; Verify speaker connections and ensure speakers are functional |
| Remote control not working | Remote battery depleted; Plastic insulating tab not removed; Remote not pointed correctly | Replace the battery (CR2025); Remove the plastic tab from the battery compartment; Point the remote directly at the amplifier's display |
| Bluetooth pairing failed | Amplifier not in Bluetooth mode; Device too far from amplifier; Device already paired with another unit | Switch the amplifier to Bluetooth mode; Move your device closer to the amplifier (within 10 meters); Disconnect your device from any other Bluetooth connections |
| Poor sound quality | Speaker impedance mismatch; Low quality audio source; Incorrect bass/treble settings | Ensure speakers are within the 4-16 ohm range; Use high-quality audio sources; Adjust Bass and Treble controls to desired levels |
| Unit overheating | Blocked ventilation openings | Ensure adequate airflow around the unit. Do not place objects on top of or next to the amplifier that obstruct its vents. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | AK-45 |
| Brand | PROZOR |
| Output Power | 40W + 40W (Nominal), 80W (Total) |
| Number of Channels | 2 |
| Speaker Impedance | 4-16 Ohms |
| Bluetooth Version | 5.0 |
| Wireless Range | Up to 10 meters |
| Input Interfaces | Bluetooth, USB 2.0, SD Card, RCA Audio Input, FM Radio |
| Output Interfaces | Speaker Output |
| Power Supply | AC 90-240V 50-60Hz (DC 12V input also supported) |
| Product Dimensions (L x W x H) | 21.5 x 20 x 9.5 cm (8.46 x 7.87 x 3.74 inches) |
| Product Weight | 930 g (2.05 lbs) |
| Compliant Standard | CE |
| Remote Control Battery | 1 x Lithium-metal (CR2025) |
Warranty and Support
Warranty Information
This PROZOR AK-45 amplifier comes with an 18-month warranty from the date of purchase. This warranty covers manufacturing defects and workmanship. It does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.
Customer Support
For technical assistance, troubleshooting, or warranty claims, please contact PROZOR customer support. Refer to the contact information provided on the product packaging or the official PROZOR website for the most up-to-date support details.