User Manual of Douk Audio VU4

Warm Tips

Compatible with most audio devices, but cannot guarantee 100%. If there exists common ground noise, please add an isolation module between VU4 and your device.

• VU4 is the original 4-channel professtional VU meter designed by Douk Audio, and designed with two display mode to satisfy more needs and get much fun and higher playability:
  
  VU Mode: display 2 groups of stereo audio input at the same time, each channel of each group corresponds to a VU meter to display the specific input audio level, easily to monitor the music level in real time. The swing of pointer of each group can also be turned off independently.
  
   EQ mode: four VU meters will show different frequency value (100Hz / 1KHz / 3.3KHz / 10KHz).Convenient to monitor the amplitude of specific frequency, just as a music spectrum analyzer to show the input level in different frequencies, very cool and amazing.
• Great combination of VU meter and audio adapter: besides MIC pickup, VU4 also with 2 groups of RCA and balanced XLR inputs and outputs, all channels of all groups can work independently at the same time. The pointers swings along with the rhythm, orange backlight to dynamically and warmly decorate your listening space.
• Advanced functions and perfect design details: with independent GAIN adjustment, input selector and remote control, most settings can be adjusted from the distance and will be saved even shutdown. The power is only for reading the sound signal but won't affect the sound quality. All interfaces are gold-plated to ensure the tight connection, effectively reduce the sound transmission loss.
• Customized size with exquisite appearance: all aluminum alloy metal CNC case, standard 2U case size, black looks cool and attractive but also strong and durable, easily placed into any standard cabinet and compatible with most common audio devices, perfectly suitable for various usage scenarios, provides HiFi music and visual feast at the same time.

• Brand: Douk Audio
• Model: VU4
• Audio input: 2 groups of stereo RCA / 2 groups of balanced XLR / Microphone
• Audio input: Bluetooth / stereo L/R RCA
• Audio output: 2 groups of stereo RCA / 2 groups of balanced XLR
• Max input level: 2.5Vrms
• Max effective input level: 1.1Vrms (VU4 will always be full display when exceed this)
• Monitoring frequency range: 20Hz-20KHz (VU Mode) / 100-10KHz (EQ Mode)
• Input impedance: 50KΩ
• Brightness adjustment: supported (4 levels)
• Gain adjustment: support (-3dB / 0dB / +3dB switchable)
• Display mode: VU Mode / EQ Mode
• Working voltage: DC 12V (above 1A)
• VU meter size: 73.5*32.5mm
• Settings saved after shutdown: supported
• Remote Control: supported
• Dimensions(W*D*H):430*100*85mm / 16.93*3.94*3.35in
• Net weight: 2.0kg / 4.41lb
• Package weight: 2.5kg / 5.51lb