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Douk Audio VU2 MIC + LINE Dual Analog VU Meter and 4-Way Audio Splitter Switcher Box Review

A dual analog VU meter and 4-way RCA splitter in one: run 4-IN-1-OUT to compare sources or 1-IN-4-OUT to feed four destinations, with microphone pickup, gain and delay tuning, and a remote.

3.83.8 out of 5 starsUpdated October 14, 2026
$179.00Price checked October 14, 2026
Check price at Douk Audio
Douk Audio VU2 MIC + LINE Dual Analog VU Meter and 4-Way Audio Splitter Switcher Box

Our verdict

The VU2 is a $179.00 dual-duty box: a dual analog VU meter up top and a four-channel RCA switcher underneath, original to Douk Audio. In 4-IN-1-OUT mode it compares up to four sources; in 1-IN-4-OUT mode it distributes one source to four destinations, and it can even mix or split all four at once. Gain and delay tuning shape the needle behavior, and a remote runs it all. The caveats are practical: RCA-only connectivity, an external USB power source, and occasionally an isolation module if ground noise creeps in.

Best for
Listeners who want to compare or distribute up to four RCA sources or destinations and watch analog needles do it.
Skip if
Your system uses balanced connections, or you want a switcher with zero risk of ground noise in any setup.
Check price at Douk AudioHow we research

The Douk Audio VU2 is a dual analog VU meter combined with an audio splitter and switcher box, priced at $179.00 in Light or Blue style. It is an original Douk Audio design that pairs wired stereo RCA input and microphone pickup with a four-channel switchable array, presented in a cool black case with colorful indicators.

As a meter, the VU2 shows music levels on dual analog needles, reading from the RCA input or the microphone. As a switcher, it works two ways: in 4-IN-1-OUT mode it compares the sound quality of up to four sources, such as a phone, tablet, TV, CD player or DAC, and in 1-IN-4-OUT mode it contrasts up to four destinations, like a preamp, headphones, a power amplifier and active speakers. The four channels can also input simultaneously to mix sources or output simultaneously for monitoring and recording, all without re-plugging cables and wearing out connector contacts.

The meter section is tunable in ways most displays are not. Gain adjustment sets the swing range of the pointer and can fix the 0dB position for recording use, handled digitally by the microcontroller so it has no physical contact with the audio signal. Delay adjustment changes the pointer's sensitivity and beating speed to match slow ballads or fast rock, and the ACG and DB modes select the scaling behavior. The USB interface powers only the VU meter's drive board; the meter reads the signal from the I/O path without influencing the audio circuit. All terminals are lengthened gold-plated pure copper with large contact areas for ultra-low signal loss, and a remote control is included.

One compatibility note from Douk Audio: while the VU2 works with most audio devices, compatibility cannot be guaranteed 100%, and if common ground noise appears in a given setup, an isolation module between the VU2 and the device is the recommended fix.

Douk Audio ships worldwide with free and expedited options, and the cost varies by destination country. Packages under 2kg go by airmail (10-25 days); heavier orders ship via DHL, UPS or FedEx (5-8 days). Import duties or customs charges are the buyer's responsibility. The store offers a 30-day free return or full refund and a 1-year warranty on all items, excluding orders placed by mistake, man-made damage or misuse, subjective change of mind, and anything outside the warranty terms.

What we liked

  • Dual analog VU meters display the music while the box switches or splits up to four RCA channels
  • 4-IN-1-OUT compares sources like a phone, tablet, TV, CD player or DAC; 1-IN-4-OUT feeds a preamp, headphones, power amp and active speakers in turn
  • The four channels can also input simultaneously to mix sources, or output simultaneously for monitoring and recording
  • Gain and delay adjustments let you set the pointer's swing range and beating speed to suit slow or fast music
  • The USB power only drives the meter display board and never touches the audio circuit, so sound quality is unaffected

Worth noting

  • Douk Audio notes it cannot guarantee 100% compatibility; if common ground noise appears, an isolation module must be added between the VU2 and the device
  • All connections are unbalanced RCA, with no XLR or 3.5mm options for portable sources
  • It needs an external USB 5V power source to run the meter board

Questions before you buy

What switching modes does the VU2 support?

4-IN-1-OUT to compare up to four audio sources on one output, or 1-IN-4-OUT to route one source to four destinations. All four channels can also run at once to mix inputs or split outputs.

Can I adjust how the needles move?

Yes. Gain adjustment sets the pointer's swing range digitally without touching the audio signal, and delay adjustment changes the beating speed and sensitivity to suit different music styles.

Does the VU2 affect sound quality?

Douk Audio states the USB interface only powers the VU meter's drive board and has no interference with the audio circuit; the meter reads the signal from the I/O path only.

What is the return and warranty policy?

Douk Audio offers a 30-day free return or full refund and a 1-year warranty. Exclusions include orders placed by mistake, man-made damage or misuse, and subjective change of mind.

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