Electronic Module Xs9871 Mini AB Module Digital Amplifier Board Module 5V Mono 5W Audio Power Amplifier DIY

FAQ 1: Is Amplifier Board Noisy? 1. Poor Power Filtering Is Caused by AC Ripple, Which Can Basically Solve the Problem by plus-Sized Filter Capacitor 2. the Sound Source Itself Has Noise Extraction, and the Sound Audition Recommend Uses Lossless Format 3, the Quality of the Signal Line Is Poor Or It Is Not a Special Blind Line 4. the Signal Line Is Relieved Or Suspended. If the Bottom Line of the Input End Is Suspended, the Noise Will Be Very High. 5. the Board Can Be Installed in the Metal Shell to Shield, it Can Avoid Interference to a Large Extent 6. Common Power Supplies Interfere with Each Other. The Wiring Is Not Reasonable during Installation. 2. Amplifier Board Is the Sound Low? 1. When the Speaker Is Played without a Box Exposed, the Sound Will Be Low after Receiving the Sound Wave Short Circuit. If There Is No Box for the Time Being, the Simple Test Method Is: Find a One Carton and Stick It around with Dry Liquid to Make a Box, dig a Big Hole That Can Fit the Speaker, Play Trumpet Outward, the Effect Is Better 2, the Speaker Power, Impedance Does Not Match the Effect, the Rated Power Base of the Speaker Is Greater than Or Equal to the Output Power Impedance of the Amplifier. Generally, 4-8 Euros Are Selected. the Material and Caliber of the Diaphragm of the Speaker Are Also Very Important. Please Select 3 for Specific Circumstances, the Input Signal Level Is Low to Less than the Amplitude of Power Amplifier Reverse Demand, Usually between 600mv ~ 1V, If Not, the Preamplifier Will Be Added. Third, Amplifier Board Distortion? Distortion Is the Phenomenon That the Signal and Output Signal Change in Amplitude Proportional Relationship, Phase Relationship and Waveform Form. Audio Amplifier Distortion Is Two Categories: Electrical Distortion and Body Distortion. Electrical Distortion Is Caused by Electric Power, and Acoustic Distortion Is a Kind of Electrical Distortion Caused by a Sound Counter: Harmonic Distortion, Intermodulation Distortion and Transient Distortion. The Acoustic Distortion Is Mainly the AC Interface Distortion, Which Is Divided by Nature, with Nonlinear Distortion and Linear Distortion. Beginners Often Ignore the Power Supply Voltage Selected by the following "Electrical Distortion", and the Power Is Too Low, if You Turn It out Loud, It Will Be Distorted. For Example, If the Output Peak Power of One Power Amplifier Is 15W and the Working Voltage of Recommend Is 12V, Then the Power Supply Should Be 1.5 Times Higher than the Output Peak Power of the Power Amplifier, about 22W, that Is, Current = Power/Voltage = 22/12 = 1.8A. Excessive Input Level Amplitude Will Also Cause Saturation Distortion. Product Application: Bluetooth Speaker, Loudspeaker, Pull Rod Speaker Box, Video Machine, Etc...