Douk Audio VU3-PLUS 2-Way Amplifier/Speaker Selector with Power VU Meter Review
A pre-sale 2-way amplifier and speaker selector that keeps two amps and two pairs of passive speakers connected, with analog VU meters that show real amplifier output in watts.

Our verdict
The VU3-PLUS is a step up from Douk Audio's VU3-PRO selector: it keeps two amplifiers and two speaker pairs connected and adds a genuine power meter that shows amplifier output from 0.01mW to 1000W, so you can set volume by real wattage, match speakers or compare gear. Analog VU meters with 35 colors, remote control and 5-15V triggers round out the HiFi feature set, and a 510 ohm protective load safeguards the unselected amp. Just note it is a pre-sale listing and a selector only - the amplifiers and speakers are yours.
- Best for
- HiFi listeners who want to A/B two amplifiers or two speaker pairs and see real amplifier wattage on a classic VU display.
- Skip if
- You need immediate shipping or expect the selector to add amplification - it is a pre-sale switching and metering box, not an amp.
The Douk Audio VU3-PLUS is a 2-way amplifier and speaker selector priced at $229.99. It sits in the signal chain rather than amplifying anything itself: it keeps two amplifiers and two pairs of passive speakers permanently connected, so you can switch between amps and speaker pairs for quick A/B comparisons, or keep both speaker pairs active when you want wider coverage.
Its headline feature is real power metering. The meter shows actual amplifier output in watts, with a selector for 2, 4, 6 or 8 ohm speaker loads, and 0/+20dB gain covering a 0.01mW to 1000W range without altering the sound. AVE mode gives steadier average output readings while PEAK captures fast transient peaks.
The large analog VU meters follow the music with 35 backlight colors, color cycling and five brightness levels, and can be turned off completely while amp and speaker switching stays active. Pass-through power handling reaches 1000W at 8 ohm (700W at 6 ohm, 500W at 4 ohm, 200W at 2 ohm), and the unit is compatible with Class A/B/D, BTL and tube amplifiers. A built-in 510 ohm protective load guards the amplifier you are not listening to, while remote control, 5-15V Trigger IN/OUT, a GND terminal and USB-C 5V power round out the connections. A CNC aluminum front panel and steel chassis give it the solid feel of a true HiFi component.
Douk Audio ships worldwide with free and expedited options; costs vary by country. Parcels under 2kg ship airmail (10-25 days), heavier orders by DHL, UPS or FedEx (5-8 days), and any import duties or customs fees are the customer'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
- Keeps two amplifiers and two speaker pairs wired at once for quick A/B swaps without re-cabling
- Power meter reads actual amplifier output from 0.01mW to 1000W, with a 2/4/6/8 ohm selector for accuracy
- AVE mode gives steadier average readings and PEAK mode catches fast transients
- Handles up to 1000W pass-through at 8 ohm and works with Class A/B/D, BTL and tube amplifiers
- 510 ohm protective load guards the unselected amplifier during switching
Worth noting
- Pre-sale item: expect a wait before dispatch rather than immediate shipping
- It switches and monitors rather than amplifies, so you still supply your own amplifiers and passive speakers
- Running both speaker pairs together wires them in parallel, so your amplifier must support the combined load and the meter needs the closest matching ohm setting to stay accurate
Questions before you buy
What is the maximum power the VU3-PLUS can pass through?
It depends on the total load impedance: 200W at 2 ohm, 500W at 4 ohm, 700W at 6 ohm and 1000W at 8 ohm. Douk Audio advises not exceeding the corresponding power limit.
Can I use both speaker pairs at the same time?
Yes. When both pairs are active they are connected in parallel, so select the 2/4/6/8 ohm setting closest to their combined impedance and make sure your amplifier supports the combined load - for example, 4 ohm and 6 ohm speakers combine to about 2.4 ohm, so select 2 ohm.
Does the metering affect the sound?
No. The 0/+20dB gain selection covers the meter range only and the description states it does not alter the sound, and the VU meters can be switched off completely while amp and speaker switching stays active.
How is the VU3-PLUS powered, and is it available now?
It runs from USB-C 5V, and this is a pre-sale listing, so expect a wait before dispatch rather than immediate shipping.
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