How to Use:
AC DC12‑16V power supply, it is necessary to distinguish between AC and DC input terminals, and the output terminal of the power amplifier takes out the . 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, For audio sources such as preamps, please turn the DIP switches 1 and 3 to the "ON" end. If the input is to take out the from the output of the power amplifier, please turn the DIP switches 2 and 4 to the "ON" end, the will be compressed 11 times. The adjustable potentiometer "100R‑V" is used to adjust the backlight of the vu meter. The adjustable potentiometers "50k 1" and "50k 2" control the swing amplitude of the pointers of the VU meter 1 and VU meter 2 respectively.

Specification:
Item Type: VU Meter Driver Board
Material: ABS, Printed Circuit Board
Maximum Influenzae: 600uA±10%
Internal Dc Impedance: 650Ω±10%
Insulation Resistance: 50mΩ
Friction: ±1mm
Pointer Length: 44±1mm from Pointer End to Axis
Pointer Width: 0.45±0.05mm
Meter Installation Position: Vertical
Backlight: 2.8 to
Scope of Application: Suitable for DIY, Recording Studio, Etc
Weight: Approx. 206g / 7.27oz

Package List:
2 x VU Meter
1 x Driver Board
6 x Cable
1 x Audio Cable
1 x User Manual