TC HeliconTC-Helicon ENDER - Portable Mixer with USB

I can't recommend this enough for people that use hardware synths. 6 stereo inputs is almost impossible to find, very few options.The blender is feature rich and super simple to use. It's recognized flawlessly on fl studio and allows me to hook up multiple instruments at the same time to keep me in the creative flow. I wish more people knew about it as it took me a while to hear about its capabilities. 6 stereo inputs, 4 headphone outs, mic talkback built in, Bluetooth connectivity, usb connectivity, available battery power, and 1 knob compression. The bang for your buck ratio is off the charts on this one.

I was looking for a headphone mixer where I could get a separate headphone mix apart from the main mix. Previously I would use aux sends piped through to a headphone amp to accomplish this. I had looked at solutions from other companies, but all started at $400. If they were $300, it needed an extra piece of $100 equipment. Then I found this - it seemed to be what I wanted, yet it was under $130? Plus it has an audio interface to boot - sounds too good to be true? Well, it's true - but it has some quirks to it, but it gets the job done. As a bonus, it has an okay audio interface. Since my primary reason to buy this was as a headphone monitor, I look very favorably on this piece of kit. Had I bought this as for it's audio interface, there are better choices for less.It uses a mini-USB cable - which was phased out because the plug was too robust -ending up breaking the jack. The micro-usb interface that superseded it (which is now itself become obsolete) had a weaker cable so the cable would break rather than the jack connected to the equipment. It is also USB 2.0 speed - this will give you an idea of how old this is. I never really heard about it before - which leads me to believe this was a marketing failure and the it's being blown out for $130.A really weird quirk is that all audio ins and outs are 1/8" (3.5mm) TRS. This means most likely anyone using it will need a lot of adapters to get it into this format. All of the ins and outs are stereo - more adapters needed if someone wants a mono signal in. My Windows 10 machine sees this as 12 input interface- which is strange - all 6 stereo inputs are routed into 12-mono tracks. What is peculiar is that at first, my computer saw it as a 2-in 2-out interface and I was trying to get it to record each input separately. Then - the next day - without doing anything, it no longer saw it as a 2-in, but 12-in - so my wish came true. But now that windows sees it as a 12-in, I can't use it to route to Google Meets for teleconferencing and have to use another interface for my audio. I can't get it to go back to the 2-in as it was before.There are no XLR inputs - so if someone is using this for vocals, they must provide any other type of signal besides 1/8" TRS outside with other equipment. The headphone out is almost loud enough, but it gets a little noisy at high gain. I still have to resort to using another headphone amp after this unit for some mixing.The Android app to control it is pretty slick - like their newer GoXLR, it's much easier to use the app rather than have to control everything from the front panel of the unit. However, it is somewhat puzzling that there is no way to control the unit from a proper computer - only a mobile app.Overall, it is the best combo of headphone mixer + audio interface available new for $130. Yes there are better headphone mixers - but they are over $400. There are certainly better audio interfaces out there too. It's a better interface than my Presonus Audiobox and Behringer XENYX302. The Audiobox headphone out is too low and noisy and the Behringer's headphone out is much much noisier. What drove me to look for this unit was the awful routing headphone out and noise from the Presonus. While the TC Helicon is not the best solution, it is better than what I had before - and it was only $130. Right now, it is also my preferred audio interface, but I can see it making way for something else- but that's not a priority for me right now.

the device came without visible damage. however, only one input channel is working

I really like mine, and the audio interface works great with my iPad (haven't tried with an iPhone), but the audio interface is not recognized by my laptop running Mac OS X Mojave.Multiple websites say that it's bus powered, but it's not. It's not a huge deal, but the annoying thing is it requires a center negative power supply, which I did not expect. It comes with one, but I would like to be able to run this off a USB power bank for portable jam sessions as I've got mixed results (including ear shattering noises coming out of the headphone jack) while running this with AA batteries.