The board uses PT2399 responsible for the echo sound processing, using the Texas Instruments field effect quad op amp TL074 responsible for audio signal amplification and sound processing. Also added a new 5V output can be connected Bluetooth decoder board, the use of more convenient. In addition the Kara OK board also uses two-way microphone input (compatible with electret microphone) Working voltage: AC12 ~ 15V Package included: 1PC PT2399 Karaoke Reverb Preamplifier Board
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4 days ago
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