3.5mm Aux + RCA L/R Bi-Directional Stereo Audio Switch 4 in 1 Out A/B Analog Audio Switcher Selector

This switch is an awesome addition to my home stereo system. I needed a method to physically connect my iphone or ipad to my stereo system. The inputs on the stereo system are RCA, and I had them all in use. So, I bought a Lightning/USB-C to RCA cable for my devices along with this switch and am now sharing the phono input on the stereo. This switch is a convenient small size, so it doesn't take up much space. It is well constructed of metal (steel or aluminum). The push button switches are totally mechanical and uses no electricity, so it doesn't need to be plugged in to an electrical outlet.

Works great, as expected.

This little thing works very nicely. The buttons have a very satisfying click when depressed, it performs as intended and has no effect on sound quality. I went with the manufacturers recommendation of installing a ground loop isolator, there was a bit of feedback. Try moving the ground loop isolator around to different inputs, once I found the right one I had zero feedback noise or static whatsoever.Really excellent quality for the price, works splendidly and it has a very high quality appearance as well being made entirely of metal.

I use an audio switcher in my home studio to route audio from two computers, and two Pro Tools Digi 003 audio interfaces. I switch back and forth between devices a lot, so I've gone through other audio switches over the years, most have had plastic bodies & switches and wear out over time.This particular swither has metal body with plastic mechanical switches & it is passive, meaning it requires no electricity or batteries to make it work. Because the witches are mechanical, they make a metallic noise when you engage them, no super loud, but not 100% silent either. The RCA inputs & outputs on the rear are nice & tight but not overly so.Several manufacturers sell this switcher, so I'm assuming they all come from the same factory in China and are rebadged for whatever company is selling them. Overall the construction is good, I'm not experiencing any noise or crossover, so I'm assuming the electronics are better than many other similar devices for sale here. Nothing fancy, and doesn't look as nice as the Sima switcher I had, but I blew through two of those in about 3 or 4 years, so they weren't as robust as they looked.

My dad loved this one, because the amplifier he bought only had 2 inputs and with this one we were able to easily connect his cd player and tapes player to the amplifier. It's a great deal for the money, also it feels sturdy enough and it's easy to use, like plug and play. The way one can switch between inputs is convenient because the switchs are in the front.

I was trying to find a box or adapter that would allow red and white audio to be divided to two other items (ie hearing aid box and soundbar) that are used simultaneously. This worked perfectly. The box is of quality product and is user friendly. Would highly recommend.

I bought this to replace an old Radio Shack switch that was at least 25 years old that had been dying for quite some time. Sound quality through in my Dad’s old school Bose speakers is back, sounds like when the setup was new!

I had been contemplating making a small switcher like this - probably a little simpler, actually - as there are few 1/8" TRS jack switchers out there at modest cost. But then I did another search on Amazon, and, lo and behold, this little jewel turns up!I'll start right off and note one minor item / gripe that is slightly different from the description: Those 1/8" / 3.5mm TRS jacks on the back are black, not "silver" color. This makes them hard to see in weak lighting situations, which are typical for some (and my) usage(s) this will see. In fact, I bought this item from this vendor and paid a bit more specifically because the 1/8" jacks were pictured as "silver". I may well mask them off and add carefully a little silver or white paint to their very outside ends. To this supplier, I would suggest going back to the original shiny plated metallic finish.A version of this with gold plated jacks would appeal to audiophiles and semi-pro users. Charge $25.00, hahaha.I popped the switcher open and construction looks good, but, the switches are definitely on the cheap side. (This from a person who many moons ago designed and built his own audio preamp with mercury wetted relays to handle the audio switching, so, my "complaint" is that it remains to be seen how this unit will hold up under semi-heavy use and time. On the flip side, better switches would cost more.)A semi-pro pro sound version would be interesting: Replace the RCA jacks with 1/4" jacks. (Things might get a little crowded.) A fully "pro sound" version would have to be larger, to accommodate XLR jacks. But at that point you likely have a nice little (or large!) mixer on hand anyway...Otherwise, all looks good, and versatility is great!It should not be hard to add small brackets to the left and right side for semi-permanent mounting or even wall mounting.As noted in the product info., the switcher can be "inverted" to provide a single input routable to any of 4 outputs. (I believe a version of this unit with labelling for such a usage is available -- seems like I saw it earlier.But, best of all, and not stated in the documentation or sales description is that each set of input (or output) jacks are in parallel with themselves. That is, for example, the <#1> input RCA jacks are in parallel with the <#1> input 1/8" / 3.5 mm jacks. And the output RCA jacks are in parallel with the output 1/8" / 3.5 mm jacks. This opens up all sorts of intriguing possibilities if your source can handle moderately low input impedances. That means the source has to have a little current capability (the old NE5532 / NE5534 IC audio chip with a 100 ohm resistor in series with its output will do famously). Plus, the source has to have a decent size coupling capacitor on its output, if you don't want attenuation of the really low, lows. Most any decent headphone output can handle this.NOW... you have a switching splitter, or maybe a "feedthrough switcher", or a "switching adapter (or maybe a splitting switcher?) One can take the signal at that <#1> RCA input (say, coming off your old CD player) and feed that signal UNSWITCHED, *out* via the <#1> 1/8" "input" jack to, say, your computer (provided your computer has a 1/8" line input), AND you have TWO switchable outputs of that <#1> signal available if desired @ the output jacks (the output RCA jack in parallel with the output 1/8" / 3.5 mm jack.3 more inputs to go. Or you can reverse the whole thing. Or if you never have any other use for <#4>, it's input jacks are sitting there as a cable extender / adapter.All ya' gotta do is keep it all straight in your head, once it's hooked up!(Yeah, at almost 70 y/o, such things are a consideration for me - heh.)Further crafty possibilities could be created if one wants to fully dis-assemble the unit and start interrupting circuit board traces, but that's beyond the purview of this review (and will certainly void your warranty!)Have fun!!Update: The outside diameter of the screws in the sides of the switcher measures 2.84 mm. A "Chinese" M3?