4 Channel Audio Interfacer DJ Mixer Sound Board 16-Bit DSP Effect USB Audio Mixer Effects +48V Phantom Bluetooth for Karaoke Studio Streaming Recording,Live Streaming

This is a nice little mixer for the price! It worked right out of the box. Just a tip: input 3/4 is the line volume for your Bluetooth but you have to depress the line/USB button, have the mode on Bluetooth and be connected to a Bluetooth device. You can set your Bluetooth level from 3/4 and also the treble and bass, then control the overall volume with the "level" knob that says L/R, which looks like a pan knob but is actually the master volume. Confused? Hope that helps.

Well, when I originally ordered the 6 channel mixer. That one I had to return because when I connected it to the Line In of my computer with the RC connectors, I kept on getting buzzing noise while trying to talk and play a game. Due to not needing anything larger, I decided to get the 4 channel instead. When I received the 4 channel mixer, the buzzing went away, but the caps for the forward and backward buttons were missing. I went for an exchange only to find out that the caps were inside the bag. Now that I have received my replacement, it is all good now. I am really happy with the out come. The FX on works great. How I tested to see if there was any distortion was to game record and talk to see if anything was messing up.

Let's be real, this is a ridiculously inexpensive board. I wasn't hoping for much at all, but needed something to add a quick couple extra channels to the setup I use for solo gigs. So I was happy when it turns out the board works very well. The audio is clean and balanced, the sliders and knobs all operate smoothly and without incident, and the instructions, while not great, are adequate to anyone who's ever worked a mixing console before.Construction quality seems quite good at this price point. It seems built to provide years of service, but ya never know.The only obvious "tell" that this is a low-price board is the on-board effects. The delay and reverb are not exactly studio quality. Both sound a tiny bit muddy, not shimmery and airy the way most folks like them. I used the thing for a duo gig a couple nights ago, though, and it worked just fine in a live situation. The effects sound just fine during a live performance with backing tracks and so on.I have several other better, more expensive boards, but this one is nice and compact and seems to do the job. Anything that cuts down my load-in and tear-down time appeals to me greatly for these small-club dates. And at this price, if I get even a year's service out of the thing, I'll be happy.

You get a lot for a little. The only problem I found was on my part, in that I didn't make sure it had a video port for karaoke out. I will be solving this problem another way, but intend to keep this box busy as master musical controller.

Horrible, worked for 10 sessions? now it has developed a circuit protection problem where it will not power back on, and have to remove power source for 10mins to have it power back up. Preamp is weak.

Works well for our small practice area. BT hooks up quickly and stays locked in.

Got it the other day and tried it out with a mic and my keyboard through my amp, seems to work well, reverbs are a bit overpowering but easy to adjust. I'll mostly use it to mix keyboards and vocals through my amp. My only complaint so far is the manual isn't of much use and doesn't explain very well how to use some of the functions like Bluetooth and USB/MP3. If you already know how to use those things I guess you'll be okay. Otherwise, your pretty much on your own. No I probably wouldn't buy this one again.

Perfect for purpose