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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Nobsound 3-IN-1-OUT XLR Audio Switch ; Balanced Audio Converter ; 3-Way Stereo Passive Audio Selector Switcher (MC103 Pro 3-in)

Product ID: 334474268

Details

Brand
Nobsound
Cable type
XLR
Colour
Black
Compatible devices
Audio Device
Connector type
XLR

🔄3 XLR inputs, 1 output

🔗Gold-plated XLR ports

🛡️Aluminum shell blocks noise

€ 155.89

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your audio game—switch, compare, and conquer your soundscape!

COMPACT PORTABLE - Sleek, mini design fits perfectly in any setup or on-the-go, so your music travels with you.
NOISE FREE LISTENING - Durable aluminum housing shields your audio from external interference, preserving pristine sound quality.
PREMIUM CONNECTIVITY - Gold-plated NEUTRIK XLR ports ensure ultra-reliable connections with minimal signal loss.
PURE PASSIVE PERFORMANCE - 100% passive switcher with silver-plated contacts guarantees zero impact on your audio fidelity.
SEAMLESS SOURCE SWITCHING - Effortlessly toggle between 3 balanced XLR audio inputs for ultimate sound comparison.

The Nobsound MC103-Pro is a compact, passive 3-in-1-out stereo XLR audio switcher designed for professionals with multiple balanced audio sources. Featuring an all-aluminum noise-shielding chassis, gold-plated NEUTRIK connectors, and silver-plated switch contacts, it delivers lossless, interference-free signal switching without compromising sound quality. Perfect for audiophiles and music managers seeking seamless source selection and premium build quality in a portable form factor.

Specifications

ASIN	B07QVKPR2V
Audio Output Mode	Stereo
Best Sellers Rank	#59,432 in Electronics ( See Top 100 in Electronics ) #134 in Audio & Video Selector Boxes
Brand	Nobsound
Cable Type	XLR
Color	Black
Compatible Devices	Audio Device, Music Equipment
Connector Type Used on Cable	XLR
Customer Reviews	4.7 4.7 out of 5 stars (325)
Item Dimensions D x W x H	10.5D x 14.8W x 6.9H centimeters
Item Weight	1.04 Pounds
Manufacturer	Nobsound
Mfr Part Number	GFJ721
Model Number	GFJ721
Number of Items	1
Number of Packs	1
Number of Ports	4

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