ET30 VU Meter Amplifier Speaker Selector Switch Box, 2 in 2 Out Vintage Switcher, with DB Panel Display & Remote Control, for Stereo Class A, B, AB, D, Tube Amps Home Audio Component

All I can say is that the ET30 is an awesome piece indeed it gives my system a classic vintage look I started out just using the microphone after a few days I wired it into my system that’s the way to go it hooked up to individual left right channels it reads very well plus I can run 2 sets of speakers both at once or individually sensitivity and swing range is perfect the lighting is unreal tons of colors and you can set it so they rotate you can also dim it to your mood very nice feature the controls are dead on the knobs and case and nice aluminum the finish is perfect no interference or chatter at all and it doesn’t alter the sound quality one bit this thing is sick and definitely worth every penny the only complaint I have about it is I wish they sent the power supply that plugs into the outlet they do supply the usb cable which is kinda strange overall I rated it a 5 even though it doesn’t have the power supply but any old phone charger with usb port works fine you will not be sorry of the purchase get one you will LOVE IT.

The media could not be loaded. Product is great, highly recommend! Amir at audio science review couldn't find fault with it in his testing so I bought one to try out.Using this I have been able to test for sonic differences between many different amplifiers that range in price from $150 - $4000 that prior to testing, I would have swore sounded different to my ears. When being able to immediately switch with the push of a button, with a remote, from the comfort of my couch, I found that a $4k yamaha as2100 amp with linear power supply sounded exactly the same as a $1200 Rotel 1552 MK1 class A/B with switching power supply, which sounded exactly the same as a Hegel H190 and a Marantz model 30 (Hypex class D)! All the youtube reviewers say these amps should sound significantly different but because of this unit I now know it is because the reviewers don't have a Neohipo ET30FIRST TEST: AMPLIFIER TEST: Minidsp Flex as DAC and preamp -> 3 test amplifiersSPEAKERS:1. Original Von Schweikert VR-4's ($4k circa 1995)2. $6k Polk L800'sAMPLIFIERS:1. Hegel H190 (Class AB, switching power supply)2. Marantz model 30 (Hypex class D)3. Yamaha as2100 (5 watts class A, 90 watts class AB, linear power supply)4. Rotel 1552 MK1 (Class AB, switching power supply)RESULT: No difference! No detail or tonal difference whatsoever. Nothing that we could detect.SECOND TEST: PREAMP TEST: MiniDSP -> Marantz/Hegel/Yamaha -> Rotel 1552RESULT: No difference in preamp sections!THIRD TEST: DAC TEST: Minidsp Flex - Rotel 1552 MK1 VS Hegel H190This was the only test that yielded results. The Minidsp sounds great but the imaging was extremely narrow. Hegel added breadth to the soundstage. It sounded much larger. Also, added a sense "airiness".I have learned more about audio in a week of testing out various components with this ET30 than I have in a life time of listening. Highly recommend.UPDATE:I've done more tests.FOURTH TEST: DAC SHOOTOUT:SPEAKERS:Polk Legend L800Canton (not sure model but are a very detailed $4k model from a about 5 years ago)DAC'sDenefrips Ares II ($1k)Schiit Bifrost ($850)Topping D50 ($300?)RESULTSWe could hear no differences between these DACs on either system!!!FIFTH TEST: Hegel H190 ($4k) vs Fosi audio ZA3 amp and ZD3 DAC (total $300)SPEAKERS: Von Schweikert VR-4RESULT: I could hear no difference between these two systems!!!!CONs: The Neohipo ET30 is starting to make an audible popping noise when switching between systems and the remote is starting to become less responsive but still going strong and saving me thousands of dollars as I sell my expensive equipment and replace with affordable but equally good equipment.

Pure entertainment. This product doesn't add nor does it subtract anything from the quality of sound. What it does do however is add enjoyment to the listening experience. I love to watch the meters bounce to each channel individually. Analogous to a lava lamp but more connected and in tune. Fun, fun, fun. Worth the money.

Nice large color adjustable meters. It was hard to find a speaker level input audio meter. One issue so far. After turning the unit on you sometimes have to wake the meters up. They don't move unless you crank up the volume (and sometimes that doesn't work) so you have to switch it to mic mode then back to the amplifier input to get the meters to move. Kinda strange and annoying but not a deal breaker.

Conclusion: Excellent Product and great customer service!This is a very well built speaker and amp selector. I did some research and compared to the other competitor items including the ASR review and measurements and this came out on top. After a limited use for a few months, one of the VU meters got stuck only for audio sensor (and not the mic; that worked just fine). I contacted the customer and they immediately shipped me another one free of cost. Will definitely consider them again for similar use cases in the future.

Unit works well, however no option to run both speakers A and B from choice of either amplifier. In other words, if you have four speakers- not uncommon- you can only choose one set of speakers at a time. For me, this is a deal breaker. Unfortunately had to return because of lack of functionality.

After a year's fun with the ET30 device, I experienced a problem. Now, I worked in the business world for 60 years, so I know for certain that no enterprise operates without customer problems. I also know that the true test isn't being 100% problem free; the true test is how each problem is addressed. In my case, the Customer Service group, accessed from the email address in the owner's manual, solved my problem completely.Within a few days I was back in the VU meter/amp and speaker switcher world without having to return my unit for repair. That my friends, is how customer service is done, how friends are made, and how many other companies have not as yet learned to operate. My thanks and gratitude to NEOHIPO for their care and competency.