Does it work in passive mode? w/o usb power just passtrhu 1 amp to 1 set of speakers?

The instructions are to use the meter in passive mode by using the amp-B and speaker-2 selections. This is what I use and it works perfectly. BTW, turning the meter on while listening does not introduce any “pop” or other noise.

What other model from douk provides switching 2 in and 2 out using rca plugs in lieu of banana plugs?

This is speaker selection device so it uses speaker inputs and outputs. Douk does make component switching devices that will have RCA inputs and outputs for audio components (not speakers). Not sure if they have 2 in, 2 out but there are many others that do. Search RCA audio switcher

does it have an internal mic and not used as a switch?

Hello. If you want internal mic, please choose this one https://www.amazon.com/gp/product/B08N12PSC8/ref=ask_ql_qh_dp_hza

Since it doesn't include the wall wart for the usb power cable, what amperage is necessary? 0.5 amps, 1 amp, 2 amps?

It is 1 Amp, it says it right under the USB jack. You can see it in the Amazon pictures.

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Douk Audio VU3 Dual Analog VU Meter, 2-Way Amplifier/Speaker Switch, Audio Switcher Box with DB Panel Display

Product ID: 629152617

Details

Brand
Douk Audio
Cable Type
Banana Plug
Colour
Basic
Connector Type
Banana Plug
Number of Ports
4

📡Remote control + settings memory

🔊300W max power per channel

🎛️Dual 60x35mm vintage VU meters

Description

🎵 Elevate your sound game with vintage flair and modern control!

SMART REMOTE CONTROL - Adjust settings from afar & save preferences even after shutdown
VINTAGE VISUAL VIBES - Dual large VU meters deliver dynamic, eye-catching audio feedback
ROBUST STYLISH BUILD - Compact black chassis with warm backlit meters fits any audiophile setup
SEAMLESS AUDIO SWITCHING - Effortlessly toggle between 2 amps & 2 speaker pairs without cable wear
UNIVERSAL AMP COMPATIBILITY - Supports BTL, Class A/B/D, tube amps with fully isolated channels

The VU3 Dual Analog VU Meter is a premium 2-way amplifier and speaker switcher featuring dual large vintage-style VU meters, supporting up to 300W per channel. It offers seamless switching between two amplifiers and two speaker pairs with fully isolated channels to prevent interference. Powered via micro-USB, it includes remote control functionality, memory settings, and a sleek black design tailored for audiophiles seeking both style and convenience.

Specifications

ASIN	B096KLDMCV
Audio Output Mode	2-IN-1-OUT, 1-IN-2-OUT
Best Sellers Rank	#1,477,400 in Electronics ( See Top 100 in Electronics ) #1,941 in Hi-Fi Amplifiers
Box Contents	VU3 Amplifier Speaker Switch
Brand Name	Douk Audio
Cable Type	Banana Plug Speaker Cable
Color	Basic
Connector Type Used on Cable	Banana Plug
Customer Reviews	4.3 4.3 out of 5 stars (383)
Item Weight Unit of Measure	980 Grams
Manufacturer	Douk Audio
Manufacturer Part Number	XX-VU3
Model Number	DOUK-VU3
Number of Items	1
Number of Packs	1
Number of Ports	4
Power Source	USB power adapter
Unit Count	1 Count

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