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Marshall MXL MM-4000 MiniMixer+ 4-Channel Portable Audio Mixer
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- Turns all four inputs into mono-out for computer, DSLR or mobile device
- Line level out for mobile devices; record to mobile device and monitor audio from same jack
- Headphone jack for direct audio monitoring
- USB in & out for audio playback and recording
- Works with all TRRS mics, including the full line of MXL Mobile Media mics
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From the manufacturer
MXL MM4000 MiniMixer+
Designed specifically for the video producer on the go!
MXL MM4000 MiniMixer+ Portable 4-Channel Mixer for Smartphones, Tablets & DSLR Cameras
Tailor the Audio Specifically to the Needs of Your Project
Individually adjust the gain levels for each TRRS microphone input, whether conducting interviews with a livestreaming app such as Periscope, or recording podcasts and YouTube music videos.
Small Footprint & Discreet Design
Small, lightweight compact design allows the MiniMixer+ to easily fit into a backpack, messenger bag, or fanny packs for the ultimate mobile setup.
Converts 4 TRRS Inputs to 1 Digital or Mono Out
Converts all 4 inputs into mono-out for computer, DSLR or mobile device. Additionally, the MiniMixer+ features USB in & out for audio playback and recording, and a headphone jack for realtime audio monitoring.
Perfect for Portability and Remote Use
Powered by two AA batteries, or via mini-USB. Also features a threaded tripod mount for the perfect mobile interview set-up.
The MM-4000 Mini Mixer+ is a portable Analog/Digital Audio Mixer that allows you to convert up to 4 electret microphones to mono output for use with your mobile device or computer. The MM-4000 Mini Mixer+ has independent gain controls for each input plus headphone monitoring and line level out. The MM-4000 Mini Mixer+ is portable, compact and can powered via AA battery or micro USB.
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Weighing just7 over seven ounces with a pair of AA batteries installed, this little gem provides 4 TRRS inputs, Each with its own gain control. There is also a gang gain for al inputs at once. You can output to a TRS or TRRS 3.5mm plug or USB. Because TRRS (plus with the appropriate cable TRS) and USB outputs are available, you can use the MM-4000 with just about anything out there: DSLR, computer, tablet, smartphone, standalone audio recorder.
Power is supplied by two AA batteries or you can use the USB jack with a standard 5v AC adapter or external battery. I don’t know how long the AA batteries will last: they didn’t run out during my testing, which ran about three hours. When you use the USB output for audio, make sure you’ve turned the battery power off.
There are four TRRS inputs intended for use with electret microphones. No phantom power supplied. You can, as noted, adjust the gain on each input separately or gang them from the master gain control.
There is a separate headphone jack for monitoring, with its own volume control.
The audio output is a mono signal. If you are using the I/O jack, make sure you use the appropriate cable. The output jack is TRRS. The device you are hooking up to determines whether the other end should be TRRS or TRS. Typically newer devices like smartphones, tablets and laptop computers will use TRRS, which is easily recognizeable because they have only one 3.5mm jack. Older devices and some audio gear will use TRS and have separate jacks for micropone and output. A lot of people don’t understand tehse distinctions and a Google seach will reveal many competent articles on the subject.
A short, well-written manual is supplied and I suggest a careful reading. It has instructions for using the MM-4000 with DSLRs, mobile devices (smartphones and tablets primarily) and Windows and Mac computers.
Several factors justify, in my opinion, the apparently high price of the MM-4000.
It is a very well designed, compact unit that is fully portable. With batteries installed, it barely tops 7 ounces. It will handle four inputs, which is great. You can use all inputs for mics or reserve one or more for music and sound effects. With appropriate production software, you could create a podcast in the field complete with music and effects. There’s a ¼-20 tripod screw on the bottom. With an adapter, you could use this for a shoe mount. It’s arguable whether the lack of visual gain indicators, such LEDs, is a deficit when you can live monitor through headphones.
Overall, the MM-4000 is a very potent solution for anyone who does field recording and it also serves well in the studio. I like it. Pack it with up to 4 lavaliers, a pair of decent earbuds, an external battery and the appropriate cables and you have the makings of an audio production setup weighing just a few ounces that will fit in a medium-sized pouch.