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Product description
BT-398A Bluetooth Stereo Audio Amplifier 
Upgraded version of the AK-45 stereo amplifier
450W Peak Power (450W+450W)
Strong Power Speaker Bluetooth 5.0 Amplifier Receiver for Home Audio,Garden Party,etc.
Wide Applications
Suitable for various scenarios such as home, garage, pool party, supermarket broadcasting, etc
2 Microphones Inputs
Take your microphones,enioy singing with your friends and family in the party.
Bass & Treble Control
Designed with volume, treble and bass control knobs for more delicate adjustment of the sound.
2.0 Channel Wireless Stereo Amplifier
Supporting not only 4-16 inch passive speakers but also active subwoofers
1 Speakers Receiver
2 Sound Reinforcement
3 MultiFunction connection
4 Karaoke Amplifier
5 2.0 Chanel with bluetooth
Optical & Coaxial Inputs 
450Wx2 Peak Power
This professional indoor stereo receiver is designed with independent 2.0 channel outputs, and each channel can handle up to 400W of peak load power
Bass and treble controls
It has rich bass, clear highs, and an outstanding richness of sound that most amplifiers can only replicate
Bluetooth 5.0 Connectivity
Your house! Your music!
Behind every pair of great speakers is a great amplifier. Simply connect the speakers and phone to enjoy excellent audio quality and get the most out of your music
2 microphonesPerfect For Karaoke
The two microphone inputs are great for karaoke or announcements. Just make sure to use dynamic microphones, as other types could cause magnetic interference at the mic connectors
The power amplifier is connected correctly, why is there noise such as electric current?
Please check whether there is current sound when no load. And confirm that the surrounding current signals will not cause interference. Please make sure all the cable completely pushed into the device, incompletely connections will create distorted
If you find that the Bluetooth connection is unstable, you can try the following steps to solve it.
Make sure there are no obstacles (especially metals) blocking the signal. Turn off the power amplifier, disconnect and clear the connection of the Bluetooth transmitting device, and try to reconnect.
Why only one channel work ? Is it defective?
Since the amplifier is not used alone, it needs to be used together with other electronic equipment, so it needs to be ruled out one by one! Are the positive and negative wires connected to the speaker connected together?
Can you connect two devices with bluetooth?
No, connecting two at the same time will cause the audio stream to be disrupted. It can only be disconnected and then connected to other devices.
Can bluetooth function and wired connection be used simultaneously?
Please note that the Bluetooth function and the wired function cannot be used at the same time, so when you want to use the amplifier via the Bluetooth function, do not connect any devices to the jacks (except the microphone jack).
【Multi-function Audio Control Center】This upgraded metal body audio amplifier integrates bluetooth receiver, USB/SD/FM and other multi-mode inputs, and is designed for home stereo systems. As a 2-channel amplifier, Power amplifier 450W+450W,it supports 60Wx2 powerful output, is compatible with 4-16Ω passive speakers, and presents HiFi-level sound quality with ≤0.4% distortion rate and 80dB signal-to-noise ratio. It is an ideal choice for building a stereo system for home. Built-in professional audio processing chip can perfectly connect the speaker amplifier system to meet the needs of home theater/K song/party multi-scene.
【Smart Bluetooth Interconnection】As a benchmark device for stereo receiver with bluetooth, it uses Bluetooth 5.0 technology to achieve 10 meters of stable transmission. The bluetooth amplifier for speakers supports lossless decoding and quickly establishes a connection through the bluetooth receiver for home stereo. Specially designed mode switching logic: the current Bluetooth connection must be disconnected before switching the input mode to ensure that the stereo receiver signal is not interfered. Compatible with wireless projection of smart devices such as mobile phones/tablets/TVs.
[Professional-grade sound effect adjustment] The amplifier de audio is equipped with independent high/bass knobs and dual microphone interfaces, which can enhance the low-frequency shock and high-frequency penetration clockwise. As the core component of the receiver for speakers, it supports professional-grade sound field control through the volume of the mini amplifier, and with the dual microphone reverberation adjustment, it can easily create an immersive karaoke experience.
[Full-scene adaptation solution] As a compact stereo amplifier, the 7.1-inch mini body is compatible with bookshelf/tower/outdoor speaker systems. It integrates USB sound card/SD card direct reading function and supports multi-format decoding such as MP3/WAV. The bluetooth amp feature makes it flexible for home entertainment/computer games/garden audio and other scenes, and achieves all-weather stable output through audio amplifier technology
[Industrial-grade hardware architecture] The upgraded stereo receivers adopt metal shielded inductors and anti-interference circuit design to ensure continuous high-load operation without jamming. As an advanced model of the bluetooth amplifier, it retains the core treble/bass physical knobs to simplify the operation process. The dual MIC interfaces and independent volume control allow this speaker amplifier to perfectly balance professional performances and daily entertainment needs, reshaping the value definition of the home audio center.
