Question 1

Does the mixer have screw holes on the bottom for mounting under the desk or to wall?

Accepted Answer

Unfortunately, no. You can a wall basket or wall mount organizer and do some modification.

Question 2

Hi i would like to listen to music from my phone and my games from my PC in my headset can i do this?  and would the sound be Stereo or mono?

Accepted Answer

The output would be stereo, keep in mind you will need an amplifier if you use this though along with 3.5mm to 1/4 inch adapters so you can plug in your phone and pc. Any basic headphone amp should work. I also use this with my phone, PS3 and computer all at once

Question 3

When used as a mixer, does this unit effectively isolate the four inputs from each other to prevent backfeeding of signals between devices?

Accepted Answer

Hello matt:

This is a passive mixer splitter.  Which uses resistors.  Any passive signal path solution, there are some technical caveats. For a start, the input and output impedances vary considerably with the configuration and volume control settings: the input impedance ranges from 25-100 kΩ, and the output impedance from 1-4 kΩ. Secondly, there’s some inherent loss of level through the unit, even with the level control at maximum, typically amounting to around 12dB. Consequently, this unit is only practicable when used with active electronic sources and destinations that have very low source impedance and high input impedance. So we’re basically talking here of electronic keyboards, drum machines, mixers, powered speakers and recording devices; it can’t be used directly with microphones or electric guitars as sources, or with headphones or passive speakers as output devices. It’s also important to keep cables as short as practical to avoid the potential loss of high frequencies.
These minor technical considerations aside, the SPLITMix4 is a fantastically versatile and well-made little unit that makes a brilliant problem-solver wherever it’s necessary to combine, distribute, or control the level of a number of unbalanced mono or stereo signals. Its simplicity and relatively low cost belies the genius of its design.

For sound critical situations, get a device that has a power supply, either external or internal.  This type of design will use amplifier IC's inside, and will do a better job of keeping each inputs signal from bleeding into another.  But your cost will go up to $ 200.00 and higher.

Question 4

Will this work as a passive headphone splitter/box  being driven by a 2 watt amplifier?

Accepted Answer

I would assume yes.

SPLITMix 4 Four Channel Passive Splitter/Mixer

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