2.1 Channel Wireless Amplifier Wireless 5.1+AUX+ USB+USB Sound Card + Mobile APP Hi-fi Sound Quality/passive Speakeroutput 15W+15W+30W with Subwoofer, Home Audio System, Car Sound Upgrade, Sleek Sound Card, Modern Audio Device, Highquality Components, Robust Amplifier, Aux Input Amplifier, USB Audio Amplifier, Home Theater Setup, Music Enthusiasts

Please note that the power supply is not included, so you will need to use your own.

Frequently Asked Questions：Selecting the right power supply is essential, ensuring it is compatible with the board and has minimal ripple. A power supply with excessive ripple can lead to amplifier board issues, increased background noise, and electrical buzzing. Higher voltage results in greater current flow and higher output power. For instance, a 12V1A power supply can be used with 3-4 inch speakers.

Having a power supply of 19V 5A or higher, with a size of 8-10 inches, is crucial. Insufficient voltage may lead to sound distortion when amplifying sound. Inadequate current can result in the speaker reducing voltage, causing abnormal operation or deteriorating sound quality.

Explanation of different audio input options. This audio amplifier module offers two ways to input audio: via Wireless or AUX. Wireless takes precedence over AUX. Wireless can be connected in any mode. Once the Wireless connection is established, it enters Wireless mode, which also allows for automatic reconnection. If there is no Wireless connection, the module switches to AUX mode when an AUX cable is plugged in.

Please remember to check that the Wireless connection of this module has been disconnected when using AUX mode.To control the overall sound level, turn the main volume knob. Turning the knob to the right increases the volume, while turning it to the left decreases it. The main volume setting affects the sound output of both the left and right speakers as well as the subwoofer.

speakers as well as the subwoofer.Is it normal for the sound to be faint, but when it gets louder, does it become muffled? The sound is not clear. Please lower the volume or For Switch to a power adapter with higher voltage.

Even if the volume is low, if it gets louder, does the sound delay occur? This is because the input power is insufficient, and the power supply is intermittently turned off for protection. Please replace it with a higher power supply. Alternatively, if the gain is too high, the power amplifier board may overheat, triggering thermal protection. Reduce the power usage or enhance heat dissipation.

The sound quality depends on various factors such as the amplifier module, power supply, sound source, and the overall audio system.In essence, the quality of sound is influenced by various elements of the audio system, including the audio transmission line, power supply, tone circuit, amplifier circuit, speaker, and the environment. Optimal sound quality is achieved when the sound source, power supply, amplifier module, and speakers are well-matched.