In xlr input - rca output setup, does it invert and sum up negative with positive signal(removing noise), and then only pass to rca?

Using XLR at both ends gives a better sound, if using XLR at one end and the other end is RCA, the sound output will slightly lower down and need to increase the volume and there will be no sound distortion.

When output "A" is selected, are outputs "B" and "C" left floating or are they grounded, etc?

Well this is a 3 IN 1 OUT switch. So only one out. As for the other inputs being grounded when not selected, I can’t answer that, but there is no noise from other inputs.

Balanced inputs without balanced internals? one customer review claims as much, which defeats the purpose of using xlr cables. is this true?

Hello. It is balanced in and out. This device won't change any characteristics. It is only a passive converter.

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DoukAudio XLR Audio Switcher 3-In-1-Out: Balanced Passive Selector Stereo Converter for Multi Source Comparison Gold Plated Shielded Aluminum Studio HiFi Audiophile

Product ID: 151663618

Details

Brand
Nobsound
Cable Type
XLR
Color
Black
Compatible Devices
Audio Mixer
Connector Type
XLR

⚡Passive design, no power needed

🔀3-in-1 XLR input switch

🛡️Gold-plated, shielded connectors

1411 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Switch Like a Pro, Hear Like a Boss

AUDIOPHILE GRADE BUILD - Gold-plated XLR connectors ensure stable, low-loss connections for crystal-clear audio fidelity.
PURE PASSIVE AUDIO PATH - Preserves original sound integrity with zero power interference—hear your music as it was meant to be.
SEAMLESS SOURCE SWITCHING - Effortlessly toggle between 3 balanced XLR audio sources for ultimate system control.
INTERFERENCE FREE LISTENING - Shielded aluminum housing blocks noise, delivering pristine, studio-quality sound every time.
VERSATILE STUDIO HI FI READY - Perfect for DACs, mixers, streamers, and more—upgrade your desktop or studio setup with confidence.

The DoukAudio XLR Audio Switcher is a premium 3-in-1-out balanced passive selector designed for audiophiles and professionals. Featuring gold-plated XLR connectors and a shielded aluminum chassis, it enables seamless switching between multiple balanced stereo sources without power, preserving pure audio fidelity for HiFi and studio environments.

Specifications

ASIN	B07QVKPR2V
Audio Output Mode	Stereo
Best Sellers Rank	#117 in Audio & Video Selector Boxes
Brand	Nobsound
Cable Type	XLR
Color	Black
Compatible Devices	Audio Amplifier, Mixer, Player
Connector Type Used on Cable	XLR
Customer Reviews	4.7 4.7 out of 5 stars (301)
Item Dimensions D x W x H	4.13"D x 5.83"W x 2.72"H
Item Weight	1 pounds
Manufacturer	Nobsound
Mfr Part Number	GFJ721
Model Number	GFJ721
Number of Items	1
Number of Packs	1
Number of Ports	4
Power Source	Passive
Unit Count	1 Count
Warranty Description	18-Month Limited Warranty

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TrustScore 4.5 | 7,300+ reviews

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