VU Meter Driver Board Module Adjusts Power Amplifier 1. ACDC12-16V power supply, distinguish between AC and DC input terminals. L, G, R: These are the dual-channel input terminals of the driver board, which can be connected to the audio of mobile phones, computer sound cards, preamplifiers and other audio source devices (the signal is the signal that the headphones can hear), and the amplifier output terminal to get the signal. When wiring, L, G, and R correspond to the left, ground, and right channels of the audio source device respectively. If the input is a mobile phone, computer sound card, preamplifier and other audio sources, please turn the dip switches 1 and 3 to the ON end. 1. ACDC12-16V power supply, distinguish between AC and DC input terminals 2. L, G, R: This is the dual-channel input terminal of the driver board, which can be connected to the audio of mobile phones, computer sound cards, preamplifiers and other audio source devices (the signal is the signal that can be heard by headphones), and the output of the power amplifier. When wiring, L, G, and R correspond to the left, ground, and right channels of the audio source device respectively. If the input is a mobile phone, computer sound card, preamplifier and other audio sources, please turn the dip switches 1 and 3 to the "ON" end. If the input is the output of the power amplifier, please turn the dip switches 2 and 4 to the "ON" end. The signal will be compressed 11 times. Note that the dip switches 1 to 4 cannot be turned to the "ON" end at the same time. 3. The adjustable potentiometer "100R-V" is used to adjust the brightness of the vu meter backlight 4. The adjustable potentiometers "50k-1" and "50k-2" control the pointer jump amplitude of VU meter 1 and VU meter 2 respectively 5. Made of high-quality glass fiber ABS material 6. The driver board components are finely manufactured and durable 7. Stable performance makes the VU meter better, the pointer swings quickly, the response is sensitive, the wide range voltage stabi