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

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

Product ID: 545235991

Details

Brand
Douk Audio
Colour
Basic
Manufacturer
Douk Audio
Number of Items
1
Number of ports
4

⚡300W Power

🔄2-Way Switching

🎚️Dual VU Meters

Description

🎶 Elevate Your Sound Game!

SLEEK AESTHETIC - Vintage-inspired design that complements any setup, perfect for the discerning audiophile.
SEAMLESS SWITCHING - Easily toggle between two amplifiers and two pairs of speakers without the hassle of unplugging.
ROBUST COMPATIBILITY - Supports a wide range of amplifiers, ensuring you can connect your favorite gear effortlessly.
USER FRIENDLY DESIGN - Micro-USB powered with remote control for convenient operation and saved settings.
DYNAMIC AUDIO VISUALIZATION - Transform your audio experience with dual analog VU meters that add a visual flair to your sound.

The Douk Audio VU3 is a versatile audio switcher and VU meter that enhances your audio setup with its 300W power, dual analog meters, and seamless switching capabilities. Designed for audiophiles, it supports various amplifier types and features a user-friendly remote control, all wrapped in a stylish, vintage-inspired case.

Specifications

ASIN	B096KLDMCV
Best Sellers Rank	#89,017 in Electronics ( See Top 100 in Electronics ) #237 in Home Audio Amplifiers
Brand	Douk Audio
Built-In Media	Quick Start Guide
Color	Basic
Customer Reviews	4.3 4.3 out of 5 stars (374)
Item Weight	980 Grams
Manufacturer	Douk Audio
Mfr Part Number	XX-VU3
Model Number	DOUK-VU3
Number of Ports	4

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