Reddit reviews Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer

I've been using Command strips to mount stuff under my desk for a while now.

What we have here is

1. O2 headphone amp going to my CD Player.
   
2. O2+ODAC going to my PC
   
3. Rolls MX51S mixer.
   
   The Rolls MX51S has my laptop, my Amazon Echo, and my CD player all hooked up together and fed to my JBL LS305B MK II studio monitors.
   
   The Rolls does have a headphone jack on it, but the O2s sound way better than the headphone jack in it.
   
   And yes, I am planning to buy some black Command Strips at some point and swap them out.
   
   EDIT: These are the Command strips I am using.

you dont need a machine. You can get the karafun app for $6 for 2 days.

then you just need microphones/mixer that you can plug into your stereo.

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I got this mixer

https://www.amazon.com/gp/product/B0002BG2S6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

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This microphone set. There are lots with a single mic that will be cheaper.

https://www.amazon.com/gp/product/B0749L15PF/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

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For the above you will need the following cables:

You will need a 1/4" audio to headphone jack cable to go between the microphone receiver and mixer

an RCA to headphone jack to go from a computer/ipad running karafun

RCA cable to go from mixer to your audio (directly to TV or to stereo)

HDMI or other cable to go from your ipad/computer to the TV

I've been trying to get a similar solution but between two PC's. I'm not a streamer, I just want to listen to a feed both and adjust the volume as needed. I bought a Rolls MiniMixer II which does the job.

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I use Line out 3.5 to RCA into the a pair of line ins into the MiniMixer - then from the line out into a headphone amp to push the feed into my headphones. I put a ground loop isolator to minimize hiss.

​

I've been happy so far, but I'm wondering if there is a better solution.

Yes there is, it's called a mixer and lets you connect multiple sources to one device.

Sorry I forgot to link :x. This is the one I use in my setup rolls mixer. I have my computer, Nintendo switch, and music all routed through it. I was tired of switching devices or not being able to get them through my speakers or headphones at the same time. What's cool about it is that you can run it to an amp or just plug in headphones and switch between them at will. It's obviously a more expensive solution though.

Edit: and you could then run the audio from the switch's display to the unit as rca and from the computer to the unit as rca and you wouldn't need to mess with the 3.5mm plug all the time. Then you have the option of using one or both devices without any configuration.

Btw sweet rig, hope that helps!

I got this in January: https://www.amazon.com/gp/aw/d/B0002BG2S6/

Nothing but good things to say at 55 dollars. You may want more channels but with 3 rca one being a 1/8in combo input plus XLR, it was plenty for me. No noise from it when I plugged it into my Audiosource 100 amp ie: properly grounded. There was noise, very tiny, but noise none the less when plugged into the wall

That's more like it. In fact, I just came back here to post a link to that and say "something like this": amazon.com/gp/product/B0002BG2S6

Regarding KVM (keyboard, video, mouse), 3 basic options (in no particular order):

• KVM switch (switches 1 or more monitors, plus the keyboard and mouse, between computers), or a USB switch to only the keyboard/mouse, and the monitors directly-conencted
  
  
• Synergy (or similar software); this sorta does like the USB switch option, except you don't have to "switch" between, just move the mouse between monitors, but it does require network connectivity between the "server" and "client" systems (probably the PC is the server and the Mac is the client, so the PC works if the Mac's off doing something elsewhere)
  
  
• Just remote into one of the two (probably the Mac from the PC, since the PC's static) and fullscreen the session; latency shouldn't be a concern on a local network, and you could use both monitors for the desktop if the Mac's not currently needed
  
  Number 3 would probably be my solution. About 90% of my work is remoted into a system somewhere else, and it's fast and easy to Windows or Linux; I don't have experience with remote-access to Macs (they're just not a significant presence in datacenters), but I can't imagine it's all that different.
  
  For audio (assuming stereo, not 2.1+) get a cheap small mixer (e.g. something like this, which is just the first thing that I searched up in Google), which would (safely) let you play multiple audio streams to the same speakers.
  
  If you're going to use the MBP with desktop stuff often, might be worth looking into a dock of some sort. That way you only have 1-2 cables, instead of at least 4.

Thanks. I really appreciate it! Your suggestion seems like a bit overkill for an audio pleb like myself. Would something like this work just as well for my purposes?

Oh that's easy then! You can get splitters like this where you can just flip back and forth between the inputs when you want. Some others may come with a remote.

If you really want to just have both always on I believe you'd need a mixer like this one but they are more expensive than a simple splitter.

Mini: Rolls MX42 Stereo Mini Mixer, Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer, Rolls MX44 Pro 4-Channel Stereo RCA & 1/8" Mixer, rolls Stereo 4 Channel 1/4 &amp 1/8 Mixer Pass (MX41B)

Larger: BEHRINGER XENYX 502

> The amp gets it's input from a 3,5mm TRS jack to dual XLR adapter cable which goes into a "headphone amp".
>
> The headphone amp in this case is actually just to take the stereo signal from the pc and send it to 4 other devices (one of which is the tl-700 amp we are talking about). The only controls on the "headphone amp" are volume knobs for each output.

What the F**!

So is this a multi-channel Headphone Amp something like this -

https://www.amazon.com/Behringer-HA400-Ultra-Compact-4-Channel-Headphone/dp/B000KIPT30/

Perhaps not the specific brand, but functionally similar?

And why would you not use a Stereo Mixer for this task?

https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/

And are you sure it is a STEREO Headphone amp? Can you give us the specific Brand and Model.

My suggestion at this point is to go back to the most basic configuration possible. Get rid of all the complications and go directly from - something* - into the Amp, and see if it works properly.

Given the complexity of the Setup, I suspect the Set Up itself rather than the amp are causing the problem

You need a mixer and you will need to do all the mixing in analog.

This is the one that was recommended to me:

https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/

You will need to get an analog signal from all your devices, feed them into the mixer, adjust levels and then send the mixed signal to your amp.

Not sure about cross posting links, but you can find my question in another sub about 11 days ago.

This is what you want:

Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer https://www.amazon.com/dp/B0002BG2S6/

How about this one? There's still volume knobs for each channel, but it's a small black box design.

Edit: This one's even a bit cheaper and simpler in design.

[This] (http://www.amazon.com/gp/aw/d/B0002BG2S6/ref=mp_s_a_1_1?qid=1427474272&sr=8-1&pi=AC_SY200_QL40&keywords=rolls+mx51&dpPl=1&dpID=51XD6-L%2BxAL&ref=plSrch) is the one that I bought. I'm using an RCA-1/8" cable and a 1/8"-1/8" cable. There is a little bit of a hum at louder volumes which I mitigate by using a Fiio E6

A mixer is really the only option, see this thread:
https://www.reddit.com/r/amazonecho/comments/5p35yo/how_to_connect_two_inputs_to_echo_dot/

For what it's worth, this is the mixer that I bought for about $50, and it works well enough, but not perfect. There is some barely audible popping and crackling. I'm trying to decide if it's worth spending $$$ on a more expensive mixer; so far I've decided that it isn't.

Note: I'm assuming that you have an Echo Dot which has an audio-out cable; the regular Echo does not.

I've done some googling and I'm still somewhat confused about amps and DACs and mixers. What I'm trying to do is combine all the inputs from my PC, PS4, and turntable into one, so I understand I need a mixer. But, my turntable needs an amp to drive my Sennheiser GAME ONEs.

So my question is, would this powered mixer be able to amplify the signal from my turntable, or do I need to buy a separate amp as well? The turntable has a built-in preamp, if that helps at all.

a mixer if you want all devices to output to your headphones at the same time. Then route the line out from the mixer to your amp.

A DAC with three digital inputs if you don't want to mix the signals. But I don't know if the PS4 pro or the Shield support external audio processing.

You could connect the shield via USB, the PS4 via TOSLINK, the PC via COAX and then route the analog signal from the DAC to an amp of your choice.

the headphones im interested in using are logitech g533 https://www.logitechg.com/en-us/product/g533-wireless-gaming-headset
and would a mixer like this work? https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6

Non-mobile: This

^That's ^why ^I'm ^here, ^I ^don't ^judge ^you. ^PM ^/u/xl0 ^if ^I'm ^causing ^any ^trouble. ^WUT?

You could get a combiner like this: http://www.amazon.com/Galaxy-Audio-JIB-Jacks-Combiner/dp/B005GJCA6M/ref=sr_1_1?ie=UTF8&qid=1420564999&sr=8-1&keywords=audio+combiner#customerReviews

Or a mixer and have full control over the audio levels like this:
http://www.amazon.com/Rolls-MX51-Mini-Channel-Mixer/dp/B0002BG2S6/ref=sr_1_5?ie=UTF8&qid=1420565348&sr=8-5&keywords=2+channel+mixer+rca

I would probably go with the second option.

For your situation, I would probably get something like this Stereo Line Mixer.

Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer
https://www.amazon.com/dp/B0002BG2S6/ref=cm_sw_r_cp_tai_V7TPCbHAHQSP1

You may need a 1/4” (6.35mm) to XLR adapter or cable (assuming your keyboard is in mono?). If you showed me the output cable or ports for your piano, or even the model number, I could more directly address what you would need.

This will also give you independent volume controls and may be a bit more “pro” in workflow.

I'm looking for a stereo mixer to combine inputs (PC + Chromecast audio for now). I prefer it to be compact.

I saw this: https://www.amazon.com/dp/B0002BG2S6/ref=psdc_11974881_t1_B00102VV46

According to the reviews it seems to be reliable. Any other recommendations?

Will I need an amplifier? The output will go to Presonus Eris 4.5 and Dayton Audio SUB-800 and they sound pretty loud right now connected to my PC.

This thing lets you combine audio sources into one and I love it!: Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer https://www.amazon.com/dp/B0002BG2S6/ref=cm_sw_r_cp_apa_NP2NAbASCS9VZ

This is exactly what mixers are designed to do. Normally where you see mixers is those giant boards at concerts with all the slidey switches on them, and they are designed to take all the microphone inputs from the performers, redistribute their volumes relative to eachother, and then manage the output to all the venue's speakers. You essentially want a tiny version of that with only two "performers" and headphones instead of the speakers (although the the inputs and outputs need to be stereo). The box would have two (or more) inputs, a couple dials to adjust their volumes, and an output. Example: http://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6/ref=sr_1_24?s=musical-instruments&ie=UTF8&qid=1453792433&sr=1-24&keywords=audio+mixer

Something like this although I'm not currently using one so no idea how good this one is:
https://smile.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/
or
https://smile.amazon.com/dp/B00102VV46/

Update: the radioshack switch didn't work at all. For whatever reason the audio coming in on its RCA video input didn't trigger it to auto-select.

What I did find, though, is an equally good solution that works for my case. Since I only plan on having a single input playing at a time, I can use a mixer to achieve the same goal. All inputs all the time, instead of playing just the one with music on.

Similar incongruous options compared to what I want, but at least options are out there. Most seem targeted at 1/4" and Mono inputs/ouputs. A lot have 1 set of stereo-capable RCA inputs, but I specifically need (at a minimum) 2 sets of stereo RCA inputs. I could also use an adapter to convert to stereo 1/4", but pretty sure all the 1/4" inputs are mono. Here are some examples that might work:

Looked good at first, but complaints that the output is too weak (it's passive apparently)
http://www.amazon.com/Rolls-MX42-Stereo-Mini-Mixer/dp/B00102ZN40

3 stereo RCA inputs & stereo RCA output:
http://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6

Has 2 RCA stereo inputs, but A/C adapter is sold separately and it's radioshack brand...
http://www.amazon.com/RadioShack-Stereo-4-Channel-Microphone-Mixer/dp/B0050ZP1OU

https://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6/ref=sr_1_4?ie=UTF8&qid=1502266868&sr=8-4&keywords=stereo+mixer

This looks like another possible option. Is there a very tiny passive mixer I can add inline to use with the headphones?

Sucks that there is no master volume :(

I asked a similar question a long time ago, and was recommended a mixer.

Something like this: https://www.amazon.com/dp/B0002BG2S6/

I never got around to buying one, so I can't say whether that model is a good one or not.

I'd try using a small audio mixer (something like this, for reference), so you could send multiple inputs to one output (headphones/AMP), along with the ability to tune the volumes for each individual input. You'd have to make sure your mixer model supports the features of your headphones (stereo vs surround sound, frequency range, etc.), but I imagine you could find something decent for >$100.

For connecting to the PC, I'm assuming you'd either be using a dedicated sound card with a cable from it to the mixer, or use a USB adapter cable from it to the mixer. For connecting your PS4 to the mixer, you have a few options; optical cable, GameDac, USB Audio adapter, or HDMI Audio Extractor. It's up to you.

It sounds like a bit of a janky solution, but if you're already using an external AMP and you're only looking for stereo audio, the only extra piece you'd be getting at is the mixer itself. All of the other wires/boxes involved are what it take to connect your devices to your headphones either way.

That makes it easier. You can try the simplest solution first, use an AUX cable from the line out on the second PC into the line in on the primary and enable "Listen to this device" under Windows audio settings.

If you want to use hardware, you can get small stereo mixers in varying prices. There are passive mixers that could lower the volume on the stereo channel and active mixers that can keep the volume but also boost it.

Those are the best results I could weed out on Amazon that has stereo channels but I have no clue about the quality of those mixers as I have never used either of them. You will also need 3 pairs of 3.5mm to RCA cables, two for the computers and one for the headphone.

Here's what I use:

Behringer C-1

Innogear phantom power

Rolls MinimixII

I also run the minimix into a Korg Kaoss Pad Mini-KP to add effects and just play around with.

Instead of the USB, you can use the analog line-in or mic-in on your mobo, which will probably allow you to achieve a higher sample rate than USB. You'll also need to make sure that you have all the wires you need, and that they are long enough. Also, while most mixers with an XLR input will claim to carry phantom power on-board, you'll want to make sure that it provides the ample voltage for your microphone.

Option 1

Option 2

You can buy one or more of either of these and pair them with the appropriate 1/8" extension(s) (e.g., m to m or m to f depending on what cables you already have)

If you'd like to take a more proper approach to this, then here's option 3. An upside to this mixer is that it's passive (requires no power).

Option 4 is another approach that has some professional features (e.g., xlr input).

I hope this helps!

Maybe this ?

rolls MX51S Mini Mix II 2 1/4 & 3 RCA Mixer https://www.amazon.com/dp/B0002BG2S6/ref=cm_sw_r_cp_tai_B9XvzbX5K15Z1

https://smile.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/

Right, slightly more expensive then sorry: Rolls MX51

I have the Sennheiser HD 555 and I really like them so I can directly recommend the 558. However, I haven't personally tried the Q701 but comparing their frequency response, they should both sound pretty similar. ( http://graphs.headphone.com/graphCompare.php?graphType=0&graphID[]=2861&graphID[]=2931&scale=30 )

One of these, and a few RCA to 3.5mm adapters should have you sorted.

This looks to be pretty cheap and compact:

> https://www.amazon.com/Behringer-MX400-BEHRINGER-MICROMIX/dp/B000KGYAYQ/
>
> 1/4" jacks

Another option:

> https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/
>
> RCA jacks (a little more expensive for some reason!)

What about [this one] (https://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6/)?

I used to have the same problem. My solution was getting one of these: https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/
and some cheap HDMI audio extractor (Slim PS4 so no optical out).

There might be better solutions, but that did the trick for me.

>So is this a multi-channel Headphone Amp something like this -

Yes. Not this exact model and not from Behringer, but functionally the same (it has both 3.5mm and 1/4" jack IIRC).

Sadly I don't know the brand or model. Edit: I'm pretty sure I found it: http://www.artproaudio.com/product/headamp-4-eight-output-stereo-headphone-amp/

>And why would you not use a Stereo Mixer for this task?
>
>https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6/

I might be missing something here, but this takes 4 stereo inputs and mixes them to 1 stereo output. That's the opposite of what is needed here.

​

>Given the complexity of the Setup, I suspect the Set Up itself rather than the amp are causing the problem

I agree the setup is rather janky, but the headphone amp is and was working flawlessly and the amp received both channels as shown by the signal led indicator that lid up in accordance with the music coming from the pc

You want to mix the voice chat from your phone with the audio from the game. Effectively, you need a mixer, not a splitter. That would be something like this https://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6

For that, you want a mixer. This is the one I have, which isn't great but gets the job done: http://www.amazon.com/dp/B0002BG2S6

I don't use the XLR input, but I have my 2 desktops and a laptop all wired in to the 3 RCA inputs. The mixer output goes to the amp, and then to the speakers (Micca Club 3, which are the little brothers of the MB42X I linked to above). It ends up looking like this: http://imgur.com/W7JbmbW

No, that's almost identical to the Rolls one which is a piece of hot garbage. Cheaply made, lots of noise, felt like I was going to break it by using it.

Probably not cost effective, but you could get a single input amp and a small rca mixer like this: Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer https://www.amazon.com/dp/B0002BG2S6/ref=cm_sw_r_cp_api_i_-SNEDbFME2ENK

I find it really handy in a variety of applications.

You'll have a tough time finding something with two separate USB inputs. Pretty much any small format mixer can do this, but you'll have to just come out of your computers headphone jack or get a standalone DAC. Something like this: Rolls MX51S Mini Mix 2 Four-Channel Stereo Line Mixer https://www.amazon.com/dp/B0002BG2S6/ref=cm_sw_r_cp_apa_i_xADzDbER6NR9R

Then maybe this one: https://www.amazon.com/Rolls-MX51S-Four-Channel-Stereo-Mixer/dp/B0002BG2S6 ?

I'd be interested to know what you get and what's your feedback. I have a similar need.

Pretty much what your looking for isnt going to work well. The problem is that mixing multiple audio sources causes attenuation. So essentially if you want to mix 3 signals and play them through headphones you're going to need a powered mixer, which are either very expensive or very shity. Powered mixer circuitry is expensive if you do it right.

To answer your question, yes the 1/4 inputs are stereo but im guessing that setup won't sound very good.

My suggestion is if your going to go with a Mixer get a Rolls brand one. Ideally you should get a analog (non-powered) mixer and run the output to a headphone amp (like a cheap O2). Personally I use this:

http://www.amazon.com/Rolls-MX42-Stereo-Mini-Mixer/dp/B00102ZN40/ref=sr_1_6?s=musical-instruments&ie=UTF8&qid=1410043299&sr=1-6

and run it into my Lyr 2, and it works very well. But if you can't afford an amp then I would suggest going with something like this:

http://www.amazon.com/Rolls-MX51-Mini-Channel-Mixer/dp/B0002BG2S6/ref=sr_1_5?s=musical-instruments&ie=UTF8&qid=1410043299&sr=1-5

I've never personally heard Samsons products but I know Rolls tends to make high quality equipment for the price range.

I'm going to use these items to feed my powered sub:

https://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6/ref=sr_1_1?ie=UTF8&qid=1465604364&sr=8-1&keywords=4+channel+mixer+rca

https://www.amazon.com/gp/product/B00S66QNA6/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

i'm not super worried about distortion from low quality components if i keep the line level low and the subwoofer gain high. noise will be negligible because the sub can't reproduce hiss anyway. i also use acoustic suspension speakers and have fairly flat bass response already, i am mostly interested in this for frequencies below 40hz.

You'll need a mixer to get the two inputs (laptop and xbox) to a single output (headphones). You can try something like this but really any mixer will work. https://www.amazon.com/rolls-MX51S-Mini-Mix-Mixer/dp/B0002BG2S6/ref=pd_sim_267_7?ie=UTF8&psc=1&refRID=E08ZR6TKJGAJQNCW820C

Just realize you'll need some cables to get everything connected. In your case, if you're using the headphone out on your laptop and xbox, you'll need 1/8" stereo to rca cables. For your headphones you'll need a 1/8" female to rca.

If you really wanted to just rig something together, you could always plug in your xbox headphone output to your laptop's mic input. Then using the software mixer, playback your mic input through your headphones. Not recommended!

The least resource intensive would be to play it from a different device, like a phone. Then the issue is that you have your PC and your phone playing through different speakers/headphones.

Some speaker sets have dual inputs, so you could actually connect both your phone and your PC to one set and listen to everything at the same time from two separate devices. But if you don't have that, then your options are a bit more limited.

There are devices that allow you to mix multiple sources with a single output. Something like this. You get knobs to individually control the volume for each channel. But it might be a bit overkill for this since you have a perfectly good computer.

I think there's one more solution if you want to play from a separate device. You should be able to connect your phone to the line in audio, and then pass that audio through to your sound output in Windows. Instructions here. That would make your computer play all the audio coming through your phone without any special software.

If you want a music program that won't use many resources (unlike Spotify), maybe give Foobar2000 a shot.