Douk Audio GFJ782_US Mini Bluetooth 5.0 Power Amplifier
Notice
- TF card and USB input mode only can be selected after you insert TF card and U-disk, or connect it to computer.
- 5mm AUX input is suitable for the audio device with low level output such as phone, tablet, MP3 etc. Connecting device with high level output like CD player to 3.5mm AUX input may result in some noise.
- If you buy the version with power supply (19V/4.74A Max Output 90W), enough to drive most home speakers. If you buy the version without power supply or want higher output, please prepare it (DC9V-24V 5.5mm/2.1-2.5mm) by yourself.
- There is a thin film on the front panel, you can tear it off to get smoother and brighter panel or keep it to protect the panel from being scratched.
HOW TO USE
- Connect proper passive speakers to the output, and please connect the amp to power adapter firstly and then plug the power cord to the socket, avoiding electric sparks.
- PC-USB/RCA/AUX input According to different audio source, choose proper audio input way and connect them with high-quality cable, press the Mode button to select correct input mode.
- Bluetooth input Long press the power button to turn it on, and press Mode button to select Bluetooth mode, and then search and click to connect successfully.
- TF card/U-disk input Insert U-disk or TF card, long press the knob to turn it on, then press Mode button to choose corresponding input mode, plug and play. Previous & next song and play & pause buttons are only available under these modes.
- Then you can rotate the knob to adjust proper volume, just enjoy its HiFi sound.
PARAMETERS
Product Overview
Contact Information
- Address: Room 1329, Wang Cheng Building, Long Guan street, Long Hua new District, Shenzhen, Guang Dong, China Contact: LIU CHENXI
- Tel: +86-18570015672
- Email: [email protected]
Frequently Asked Questions
By utilizing Bluetooth’s radio frequency connection, a Bluetooth amplifier can turn your beloved wired headphones into wireless Bluetooth headphones.
The answer to the question “do amplifiers increase sound quality?” is no, in a nutshell. An amplifier is made to boost the levels of audio signals. However, neither the recorded audio nor the reproduction of such audio is meant to be improved, either objectively or subjectively.
One of the potential reasons is that the speaker is fully blown. The output transformer is broken in some other way or is open. The speaker jack is improperly wired.
A Bluetooth amplifier is a gadget with an integrated Bluetooth radio that can pick up audio signals from other Bluetooth-enabled devices. It then amplifies such signals so that they can be heard through headphones or straight through an output port if utilizing speakers attached to the amplifier.
An electronic device called an amplifier boosts a signal’s voltage, current, or power. Wireless communications, broadcasting, and all types of audio equipment employ amplifiers. Either weak-signal amplifiers or power amplifiers can be used to describe them.
To filter, enhance, and amplify the sounds in your environment or on your Android device, use Sound Amplifier with wired or Bluetooth headphones.
An amplifier may overheat and shut down for a variety of causes. The four most frequent ones are: blown or grounded speakers, subpar power and/or ground connections, impedance (load) that is too low, and excessive Gain/Punch Bass control settings.
Advantages
Non-linear distortion is removed.
Low voltage ripple is present.
No frequency correction is necessary.
Cross and switching distortions don’t exist.
Low harmonic distortion is present in the voltage and amplifies
A power amplifier (PA) increases the power of a low-power signal. Audio amplifiers, which are used to power speakers and headphones, and RF power amplifiers, which are utilised in the transmitter’s final stage, are two typical examples.
Connect the ground (black) and power (red) wires.
One of the simplest things to do is to connect the amplifier’s power wire to the positive battery post of the car and the ground to the negative battery post.
Connect the microphone to the amplifier.
Use one fuse in the amplifier after checking all the available fuses.
The amp will clip before it reaches its actual maximum output if the electrical system of the automobile is unable to supply it with enough power. It might be because the wiring needs to be improved, the car is unable to keep up, there are weak connections, etc. In this situation, increasing the amp size will not solve the issue.
Playing MP3 and other audio format files using hardware or software.
On the software side, programmes like iTunes, Windows Media Player, and RealPlayer that are installed on a user’s computer are used to manage a music library, play audio files, and rip music from a CD.
Personal music players are small, portable devices that can play MP3 files over speakers or headphones. Many of these devices can also store photos, movies, and podcast radio and television shows.
The source file has a significant impact on the audio quality of the music being played. While mp3s are fine, wav or lossless files are considerably superior. However, it doesn’t really matter with the majority of sound systems or even headphones.
Playing MP3 and other audio format files using hardware or software. On the software side, programmes like iTunes, Windows Media Player, and RealPlayer that are installed on a user’s computer are used to manage a music library, play audio files, and rip music from a CD.
