karaoke Mic echo DELAY pre amplifier board review & sound testing 

The board uses the PT2399 integrated chipfor the echo sound processing and also use with original dual amp 4558 The original PT2399 is a typical Karaoke echo processing integrated circuits The karaoke board also uses two microphone at a time Working Voltage.- 12V DC Single Supply. The Board have 3 controls for adjusting . Mic, Echo, Audio volumes and an optional for Delay control provision.
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Salcon Pre-Mic Circuit Board with Echo-amzn.to/3BjqDah
Dual Microphone Input Preamp Kit -amzn.to/3gEkM64
PT2399 Digital Microphone Amplifier Board Karaoke-amzn.to/3BfNDqR
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