I like that if I set the gain too high that I hear noise, it means I can get a proper "tell" of when I'm trying to take volume levels out of range.Not having any cross-talk issues between devices, and am able to run multiple sets of audio without much issue. Also my L-R audio comes through more accurately than my old device did. I actually have a left and right now!

I bought this as I wanted to hear audio from my laptop my phone's bluetooth in my headphones at the same time (note: I bought a bluetooth receiver to plug into the mixer; the mixer itself does not have a bluetooth receiver). I'm by no means an audiophile, but this did the trick and things sound great.One thing to note is that the inputs are stereo, so if you're looking at taking input from an aux cord, you'll need a headphone to stereo adapter.

Like other Rolls products this is really well made, using quality components. Noiseless and has loads of gain. Great design too. Well worth the money.

Works awesome. No background noise and good build quality and lots of gain. Mixing an echo and television audio.

Purchased it to mix audio from multiple virtual machines into one speaker system. The dials and controls are nice enough, although one of the 4 dials feels loose and inconsistent compared to the other three. Its also unfortunate you can only use a fancy mic input for CH1.

I was setting up a small PA system for a fellowship hall area in our church and I wanted to combine the line inputs from the cordless microphone receiver and the audio from a television. This mixer is exactly what I needed to join these two signals into a single input on the amplifier. Previously the microphone signal went to the RCA inputs of one amplifier input while the TV audio went into the RCA inputs of a different amplifier input. Only one or the other could be input at a time, so a presenter who had a video with sound to show on the TV (through the HDMI TV input) had to switch the amplifier input from the microphone to the TV to show the video with sound through the PA into the room. Now they can start and stop the video without switching and can even add their own comments with the microphones while the video is showing. Among the possibilities is that we can have Karaoke in the room which several people are thinking about.The mixer is solidly built and it was easy to set the two volume levels for our inputs. The mixer operates very cleanly without noise when adjusting the volume levels. I appreciate that there are still two inputs available after using the RCA inputs on channel 3 & 4 for the microphone and TV audio. Channel 2 has either RCA input or 1/8" stereo input, so it is a logical choice to use for an iPod input at some point. Channel 1 only has an XLR input with switchable phantom power so we could use that for a wired microphone at some time if we want. It would be a very useful input for a DJ arrangement (maybe for a Karaoke night?) although we aren't using it at this time.

If you're looking for a quality, compact stereo mixer to combine multiple audio sources and output to a single pair of headphones or speakers, this device works perfectly. Measuring roughly 5 inches by 3 inches, its construction is solid and surprisingly made in the USA. All of the ports feature a nice and tight fit and the knobs are silky smooth. It's powered by a power adapter which is included.It has four separate channel inputs and two output options. Channel 1 is an XLR input with phantom power option (which you can turn on/off). Channel 2 input is via RCA or 3.5mm. Channels 3 and 4's input are RCA. Output is via RCA or 3.5mm. There are more than enough ways you can set this up depending on your devices and needs. If you need to use 3.5mm, either as an input or output, you can simply buy a 3.5mm to RCA cable adapter.Some reviews complain about static, hissing, or lowered volume; I have not encountered any of these issues under normal use. As long as you are using quality cables and your source output devices aren't cheap, no audio issues should be encountered. I can easily control each channel's volume independently with no loss in audio quality. Turning the knob all the way down will completely mute the source and turning it up has more than ample volume (although this may vary a bit depending on the quality of your output device). The only actual hissing I can hear (using headphones) is when you get near max volume on the knob when all other channels are silent. At the volumes you encounter the hissing at, you would blow your eardrums out. Under normal use, you don't hear it at all.There are obviously several ways you can hook this up. For reference, I am using it to connect the audio from my PC and the audio from my game consoles (PS4 and Switch) and have it all output to my headphones. In my case, the game consoles are hooked up to a Denon A/V receiver and I am using the headphone output from it to connect to the stereo mixer. For the PC audio, I am simply using the front 3.5mm output and have it connected to the stereo mixer. From the stereo mixer, I have the output audio plug into an external headphone amplifier which then finally outputs it to my headphones. My headphone amplifier definitely helps with overall volume, but even without it, the stereo mixer has plenty of power to output enough volume even to my higher ohm headphones from Sennheiser and AKG. Even hitting about halfway on the knob gets too loud and about a quarter of the way is good enough for normal use.With this particular setup, I can now get game sounds and if needed, I can stream music from my PC at the same time. Or I can use voice chat on the PC instead of using Playstation's party chat or the Nintendo Switch's currently horrible (non-existent) chat system. And of course if I just want one audio source, then I can simply turn down the knob on the stereo mixer to mute it completely.All in all, this is an excellent compact stereo mixer which makes life easier if you have a setup requiring multiple audio sources outputting to a single headphone/speaker setup at the same time. It works well as somewhat of an audio switcher as well without actually having to switch inputs or cables around. If this sounds like what you need, I wouldn't hesitate to recommend this product.

I need to run a Mac and a PC on the same desk and in addition, I have a (an?) XM radio. I got tired of jumping from mouse to mouse to remote when I wanted to go from watching TV on the PC to listening to music on the Mac via iTunes to listening to XM. And sometimes, I want to have music in the background while I watch TV or I want to hear system sounds while listening to music on another source. So I looked at mini-mixers for a couple of hours and finally ordered this one.First, the build quality is astounding. It weighs a lot for it's size 'cuz it's the real deal - not Chinese crap that cuts every corner possible. It's a steel case that's powder-coated. The pots (knobs) feel like silk and there's zero noise from them. The RCA jacks are gold plated.This thing sounds amazing and is so perfect for my use - it sits below one of my four screens and when the phone rings, it's no longer a mad fumble to turn down the music.Now a couple of things I encountered while shopping for this: Some of the photos show units that don't say Made in the U.S.A. I insist on buying American so I was concerned. Mine does say it's Made in the U.S.A. so I'm guessing that's just an odd photo. Second, the Rolls web site says something about mono on an output or something. I could never figure it out. I figured I'd return it if it was mono. The instructions it comes with says that it's true stereo through and through. Of course, that doesn't apply to the mic input. BTW, I bought the version with the mic in case I wanted to create tutorials and webinars on my computer.The only thing not mentioned anywhere is the headphone/line output. When I plugged in headphones, the rear RCA outputs cut the signal in half (I was surprised it didn't mute it) so you still hear sound in the room. The headphone volume is then controlled not my a separate pot, but by the channel pots. I didn't try the headphone out as a line out so I don't know if it senses line out and produces a level output un-affected by the pots. I've seen a lot of other devices do that so I'm guessing it does.If you need to mix three sources and optionally, a mic, you can't beat this unit.