3.5 mm Audio Switcher, 2 Ports Audio Splitter Box (2 in 1 Out / 1 in 2 Out) Mini Headphone Manual Selector Converter with Bonus 47.2 in (120 cm) Cable, No External Power Required

Solid metal case with rubber pads on the bottom to prevent sliding. The switch itself is also solid state, simple, effective, "old school" style which I love. I also like that is has 3 positions: A, B, or OFF (middle position). The ports are "reversible" (so to speak). They can be used as either inputs or outputs, depending on what you need. For my particular scenario, I connect a 3.5mm audio cable from my stereo amplifier's headphone jack to the OUT port of this device - which therefore serves as an INPUT for my scenario. I connect my headphones to the "A Input" port - which serves as an output for my scenario. When I want to hear my headphones, I flip the switch to the A position. When I don't want to hear my headphones, I flip the switch to the middle (OFF) position. I have not used the B port because all I wanted was a simple ON/OFF switch for my headphones. Some other reviewers mentioned background humming when they connect a device to the B port. I can't attest to that because I've only used the A port and the signal is perfectly clean. For what I use it for, this thing has been great.

Build quality is great. Most KVM switches don't switch audio. This was the missing piece. Now I can have high quality speakers w/ sub-woofer on two of my boxes as I switch back and forth. Additional, it also functions as a quick mute.

I was concerned, like some other reviews pointed out, that there would be a buzzing on the inactive output channel on this device. I was going to use it as a physical switch from my DAC output to headphones or speakers, so this was important if I didn't want speaker hum while headphones are active. I am pleased that there has been no hum issue at all. Additionally, listening from a desktop DAC on hd600's I cannot hear any difference in audio clarity or volume. I am extremely impressed with how well this device works for the price, and I'm overjoyed that I don't have to go into a cage match with windows audio every time I switch from headphones to speakers.

I disregarded the hum complaints as, coming from turntable audio, it's easy for power imbalances between two different devices to travel over metallic audio signals causing an audible hum and it's tricky to diagnose and solve.However my use case involved a closed loop PC audio system fed by optical input fed by a single grounded USB power supply that has zero hum and a personal media player running on lithium batteries, no potential for low earth hum here.Unfortunately, to get this device to hum all you need to do is switch to either the neutral or unplugged side and it will hum quite a bit, may try taking it apart and seeing what the flaw is.

The switcher worked as advertised

Heres the deal and why 1 star. Originally I am running a Mac mini and Windows Desktop for gaming switching 3.5 jacks back and forth on my speakers. Then I bought a cable splitter and it takes down the sound and causes a lot fuzz or white noise sound. So I bought this so I could switch back and forth only to have the fuzz in the backround again. If it wasn't for that it would get 5 stars easy.

The ReignSword Multi-Audio Switcher is a two inputs by one output (or one input by two outputs, if you prefer) passive audio switcher. It is intended to switch relatively low current audio signals such as for headphones and line level audio devices. Three 3.5 mm TRS female jacks (input A, input B and Out) and a three-position toggle switch are mounted to the fully enclosed metal enclosure. Internally, a circuit board handles all internal connections. Build quality is good.Curiously, the toggle switch has a center off position, which might be useful in certain applications. Having three poles, the switch also switches the common (ground) side of signals. This means that connections made to the two inputs are always fully isolated from one another. In my sample the metal enclosure floats electrically and is not connected to audio common (ground). I haven't attempted to switch microphone level signals, such as for mic/headsets with separate TRS microphone connectors, but it may work satisfactorily in this capacity due to the metal shielding provided by the metal enclosure.Not fancy, but small, simple and well-built. Recommended.

I'm using this to switch two computers between my desktop speakers. Clean connection; no fuzz or static that I can perceive. Only a barely perceptible "pop" when switching. Satisfying tactile experience. Middle "neither" mode is a nice bonus, and probably contributes to the lack of audible pop.