COOIDEA 3.5mm Audio Switcher – 1 in 2 Out AUX Switch, Supports TS TRS TRRS, Audio Speaker Selector with No Ground Loop Noise, for PC, Phone, Laptop, Headphones

COOIDEA 3.5mm Audio Switcher – 1 in 2 Out AUX Switch, Supports TS TRS TRRS, Audio Speaker Selector with No Ground Loop Noise, for PC, Phone, Laptop, Headphones

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ebsebs posted on r/diyaudio2w

OP - if you only need/want a 2-input switch, this one switches the audio signals and ground: https://www.amazon.com/dp/B0FCDJS5HX

ebsebs posted on r/budgetaudiophile2w

No offense intended to the folks that had legitimate issues with this device, but there are some rather ridiculous claims made in some of the product reviews. Like the person who said a passive switch would make a "lossless source" sound like "analog FM radio"?! How?? It's some connectors, wire and a switch. If that was enough to cause such severe audio degradation, pretty much every wired interconnect in a system would do the same thing. A simple passive switch shouldn't add noise or degrade the audio quality unless it is defective or of very poor quality. There is the possibility of the common ground connection used in most of these switches to introduce a ground loop hum, but that's easy to identify and eliminate by using a switch that switches the ground connection in addition to the audio signal connections, like this one: https://www.amazon.com/dp/B0FCDJS5HX