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Sound Devices MixPre-3 II Audio Recorder/Mixer Kit with Strut Custom-Fit Field Case

Sound Devices MixPre-3 II Audio Recorder/Mixer Kit with Strut Custom-Fit Field Case
Key Features
  • Field Recorder & Corresponding Bag
  • Kashmir Microphone Preamps
  • 32-Bit Recording / 32-Bit USB Streaming
  • Small Stature Fits Most Environments
Bundled together by B&H for your convenience, the Sound Devices MixPre-3 II Audio Recorder/Mixer Kit provides the aforementioned recorder/interface as well as a Strut STR-MP3 carry case for transporting the MixPre-3 II in the field.
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Sound Devices MixPre-3 II Overview

Bundled together by B&H for your convenience, the Sound Devices MixPre-3 II Audio Recorder/Mixer Kit provides the aforementioned recorder/interface as well as a Strut STR-MP3 carry case for transporting the MixPre-3 II in the field.

The recorder sports several upgrades over the previous model, including 32-bit recording and 32-bit USB streaming to ensure audio that's virtually free of distortion as well as a built-in timecode generator. The relatively compact recorder also doubles as a USB interface, giving you Kashmir microphone preamplifiers, timecode compatibility, advanced and basic navigation modes, and more.

The bag, on the other hand, offers a removable rain top, clear vinyl window, padded main compartment, and room for four G3 (or similar) receivers. The case also includes belt loop and harness attachment points as well as an HAR-2 audio harness and support for sleds that house four or eight AA batteries.

Sound Devices MixPre-3 II 3-Channel / 5-Track Multitrack 32-Bit Field Recorder

For independent filmmakers, field recordists, and podcasters who need pristine audio capture of up to three microphones, the Sound Devices MixPre-3 II multitrack field recorder is an ideal tool. Record up to three tracks of external sources plus a stereo mix at up to 32-bit / 192 kHz while monitoring your audio headphones. If you choose to use the MixPre-3 II as your studio interface, you'll be able to achieve sample rates up to 96 kHz

The MixPre-3 II offers many upgrades over its predecessor. Chief among these features is the ability to record at 32-bit floating point to an internal SD card. The unit also functions as an audio interface capable of 32-bit floating point streaming over USB to a Mac computer. This makes it nearly impossible for you to clip (distort) audio on the way in. Whether you're recording hot or making use of the unit's astounding 142 dB dynamic range, you'll only be handicapped by the quality of your microphone.

Other improvements include the ability to auto-copy recorded tracks to USB thumb drives, making file transfers a breeze. Lovers of sync will revel in a handy new feature: a full-fledged, built-in timecode generator, accurate to better than 0.2 ppm (0.5 frames in 24 hours). Even when powered off, the MixPre-3 II maintains accurate timecode for up to four hours.

All of this is available in a three-channel package that can be powered from wall chargers, computers, AA batteries, or Sony L-series batteries. Whether you use the device in an advanced or basic capacity, the MixPre-3 II will suit any intimate, field-based production.

Kashmir Preamps
Like the original unit, the MixPre-3 II offers class-A Kashmir mic preamps. All inputs are fully RF-filtered to keep interference out.
On-Board Mixing
Create a mix using the built-in 3x2 portable mixer.
Audio Interface Functionality
When connected to a Mac or Windows computer, the MixPre-3 II can serve as a 5-input / 2-output USB audio interface for your favorite audio recording software. The unit will record three tracks in isolation and provide a stereo mix of all three to boot. You can stream audio at sample rates up to 96 kHz.

The unit can send a complete 32-bit float audio signal over USB when connected to a Mac computer running macOS Catalina (version 10.15 or later).

USB Audio Input
Stream up to two tracks into the unit over USB, using the MixPre-3 II as a recorder from your host device. If you're a musician, you can utilize this feature to record a stereo mix from your host DAW as a backing track for further standalone recording.
For inputs, you'll find three XLR jacks. Headphone output connections are handled over a 3.5mm jack, and stereo line outputs can be secured over a dedicated stereo 3.5mm jack. Timecode I/O is made possible via 3.5mm connections, though you also have the option of HDMI for inputting timecode.
Adjust on the Fly
Adjust the limiters, change the bit depth, shift panning and polarity in the stereo mix, and filter out extraneous bass rumble with low-cut filters. Whether you record to an SD card or to your computer over USB, the MixPre-3 II can be customized to your needs.
Built-In Timecode Generator & Bluetooth Control
Thanks to the device's timecode generator, you can even trigger recording from the camera. With built-in Bluetooth, you can control the unit over the Wingman app, available from Sound Devices. This app displays high-resolution meters, current timecode, transport buttons, and more.
Transport and Mounting Options
The MixPre-3 II is rugged, lightweight, and relatively compact, so you can throw it in a bag or mount it to a tripod or camera.
Key Features at a Glance
  • Kashmir microphone preamps with 48V phantom power
  • Internal timecode generator
  • Sample rates up to 192 kHz
  • Bit depths up to 32-bit float
  • Adjustable limiters
  • SD card recording and reading
  • Backup to USB drive
  • 10 seconds of pre-roll at 48 kHz
  • USB control surface support
  • Customize with plugins
  • Add low cut, high pass, delay, polarity invert, and panning
  • Simultaneous recording, mixing, and USB audio streaming
  • Trigger record via timecode or HDMI timecode
  • Bluetooth for wireless control via Wingman app
  • Basic, advanced, and custom modes
  • High-fidelity headphone amplifier


UPC: 854454006527
Strut STR-MP3 Custom-Fit Field Case for Sound Devices MixPre-3

The STR-MP3 Custom-Fit Field Case for Sound Devices MixPre-3, from Strut, is a small-footprint, lightweight protective case that can be used for easy access to all MixPre-3 features. It has a removable rain top with a clear vinyl window that can also function as a sunshade or double as a travel cover.

In addition to the padded main compartment, the front padded pocket has eight clip-on points for wireless receivers, and is built to hold up to four wireless Sennheiser G3 or similar-sized receivers. This case can accommodate 4 and 8 x AA sleds, all L-Series sled options, plus NP-1, Remote Audio, and various USB-C type power options. The case features belt loop and harness attachment points for most audio harness systems, and includes an HAR-2 audio harness.

Key Features
  • Removable rain top is offered as a clear vinyl window or sunshade, and doubles as a travel cover
  • Padded main compartment
  • Front padded pocket has eight potential clip-on points for wireless RX or Comtek, and full stow-away cover; it holds up to four Sennheiser G3 or similar-sized receivers inside, and has two clip-on options outside
  • Cable boot zippered for easy on-the-run access for XLR or headphone jack adjustment
  • Multi-battery flexibility accommodates 4 and 8 x AA sleds, L-Series sled options, plus NP-1, Remote Audio, and various USB-C type power options
  • Belt loop and harness attachment points for most audio harness systems
  • Includes HAR-2 audio harness
  • Made in the USA
UPC: 764784427216

Sound Devices MixPre-3 II 3-Channel / 5-Track Multitrack 32-Bit Field Recorder Specs

Portable Recorder
Number of Tracks
5 (3 Inputs + Stereo Mix)
Maximum Sampling Rate
192 kHz / 32-Bit
Built-In Speaker
1.6" / 40.64 mm Color LCD Touchscreen
Memory Card Support
SD, SDHC, SDXC (Up to 512 GB)
Internal Storage
Audio File Formats
Sample Rates
44.1 / 47.952 / 48 / 48.048 / 96 / 192 kHz
Bit Depth
16 / 24 / 32-Bit (A/D Conversion)
Signal Processing & FX
Delay, Limiter, Low-Cut Filter
Timecode Support
Frame Rates Supported
23.976 / 24 / 25 / 29.97 / 29.97 DF / 30 / 30 DF
Clock Accuracy
±2 ppm / 0.5 Frame per 24 Hrs (Timecode)
Analog I/O
3 x XLR 3-Pin Female Balanced Line/Mic Input
1 x 1/8" / 3.5 mm TRS Female Unbalanced Aux Input
1 x 1/8" / 3.5 mm TRS Female Unbalanced Headphone Output
1 x 1/8" / 3.5 mm TRS Female Unbalanced Line Output
Digital I/O
1 x 1/8" / 3.5 mm SMPTE Timecode Input
1 x 1/8" / 3.5 mm SMPTE Timecode Output
1 x Micro-HDMI SMPTE Timecode Input
Phantom Power
+48 V, Selectable On/Off
Phantom Power Current
10 mA per Channel
Plug-In Power
Yes, 3 V
System Connection
1 x USB-C (2.0)
1 x USB-A (Control, Text Entry, Thumb Drive)
Bluetooth 4.0 
Bluetooth 4.0 (Remote)
Frequency Response
10 Hz to 80 kHz ±0.5 dB (at 192 kHz)
Gain/Trim Range
Mic Inputs:
+6 dB to +76 dB
Line Inputs:
-20 dB to +30 dB
Mic/Aux Inputs:
+10 dB to +40 dB
Line/Aux Inputs:
-10 dB to +20 dB
Up to +20 dB
Headphone Outputs:
Up to +20 dB
Max Input Level
Mic Inputs:
+14 dBu
Line Inputs:
+28 dBu
Mic/Aux Inputs:
-10 dBu
Line/Aux Inputs:
+10 dBu
Max Output Level
+7.8 dBu
Headphone Output Power
300 mW per Channel
Dynamic Range
A/D Converters:
142 dB
Mic/Line Inputs:
4 Kilohms (Active-Balanced, Line Level, Mic Level)
Mic/Aux Inputs:
100 Kilohms (Mic Level, Unbalanced)
Timecode Input:
20 Kilohms
Timecode Output:
1 Kilohms
-10 dBu (0.005%)
-128 dBu (A-Weighted)
Power Options
Battery, USB Bus Power, AC/DC Power Adapter
Battery Type
4 x AA (Included)
2 x L Series (Requires Optional Equipment, Hot-Swappable, Not Included)
AC/DC Power Adapter
5 VDC (Included)
AC Input Power
100 to 240 VAC, 50 / 60 Hz
Mounting Options
1/4"-20 Male (Top)
1/4"-20 Female (Bottom)
Operating Temperature
-4 to 140°F / -20 to 60°C
Storage Temperature
-40 to 185°F / -40 to 85°C
Operating Humidity
0 to 90%
5.7 x 1.4 x 4.3" / 144 x 36 x 110 mm
16.8 oz / 0.5 kg (without Batteries)
Packaging Info
Package Weight
2.645 lb
Box Dimensions (LxWxH)
10.3 x 7.4 x 4.3"

Strut STR-MP3 Custom-Fit Field Case for Sound Devices MixPre-3 Specs

Key Specs
Portable Recorder Compatibility
Sound Devices MixPre-4
Portable Recorder Compatibility
Sound Devices MixPre-4
Exterior: Cordura
Packaging Info
Package Weight
0.72 lb
Box Dimensions (LxWxH)
11 x 5.6 x 5.05"

Sound Devices MixPre-3 II Reviews

MixPre-3 II with USB power bank

By james
Rated 5 out of 5
Date: 2023-03-25

I'm just a hobby recordist and need something light and easy to use. Once I learned the proper settings it was pretty easy to use. The 32 bit is awesome with no chance of clipping. There has been talk about AA battery life, I got 12 min. I velcroed a power bank to the top of the unit and it worked just fine, no need to have any batteries in the sled. I just recorded 8 concerts ( 3 hrs) with no problems, and plenty of power left. A little bit of a learning at first, but that's the fun of it.

Best user interface of any recorder in its category

By Bruce
Rated 4 out of 5
Date: 2022-07-01

I had used a MIxPre-3 II and then got a Zoom F6 and the difference in the user interface was night and day. The SD Mixpre-3 has a touch screen and very intuitive menu structure. The Zoom F6 is a nightmare and 20 years out of date with its design and navigation buttons. I like being able to pair channels 1 and 2 so I can use the #1 control for the gain and the #2 control for the balance. Great to only need to manipulate one knob while recording. One con is that I cannot access the SD card if a sled is mounted to the bottom of the recorder. The Zoom F6 shares this design defect. The other primary issue is with the Mixpre-3 II Power Switchover Priority which does not actually work. If any batteries are in an attached sled the MixPre-3 will draw power only from those batteries and not from a connected power source using the USB-C port on the recorder. I stopped using batteries in the sled and for the most part leave the sled off entirely and power the recorder using only a USB-C charge cable and power bank. This makes it easy to access the SD card and replace it and no worries about the sled mounting tabs breaking off.

Good user interface but a few significant bugs

By Bruce
Rated 4 out of 5
Date: 2022-06-30

The recorder with its touch sensitive screen is relatively intuitive as recorders go. This is its best attribute. It also includes integrated Bluetooth unlike the Zoom F6. It is a hungry little beast and will quickly devour AA batteries used in the mounted sled. The sled also blocks access to the SD card bay. In theory the device can be powered with an external USB-C connected power source but in reality this only works with the AA battery sled off the recorder. With the sled attached the recorder will only draw power from the AA batteries and drain them in a few hours.

Does not work with USB C power from power banks

By Bruce
Rated 2 out of 5
Date: 2022-06-28

I hoped to have a more compact rig and purchased the MixPre-3 II sound recorder and an Anker Powercore USB C power bank. There needs to be 4 AA batteries in the Sound Devices sled and then the recorder is supposed to pull power from the USB C port when it senses power at the port. Regardless of the power bank used and the USB C cable used the MixPre-3 fails to recognize the power bank and instead drains the 4 AA batteries in the sled. This greatly reduces the utility of the Sound Devices MixPre-3 II for use in the field.

Pro sound for Filmmakers

By Royal
Rated 5 out of 5
Date: 2021-09-14

I love this small sound Recorder , it is professional and easy to use . And menu is friendly . Sound is perfect and quality is good .

Amazing audio with an intuitive interface.

By Steven
Rated 4 out of 5
Date: 2021-09-02

Love my MixPre. The quality and range of the pre-amp is second to none. Had no problem capturing the more animated parts of conversation without clipping. Only thing that keeps it from a five star review is that it consumes so much power (drained four new AA batteries in less than an hour) that I doubt I'll ever use it as a field recorder. It'll have to be parked in the studio.

Totally overkill for what I need but that's why I love it

By Hamza
Rated 5 out of 5
Date: 2023-01-11

Just superb audio quality and so many features I don't know what to do with it. Everyone knows this has some of the quietest preamps and is engineered to perfection; as someone starting out this is totally above what I need. Coming from a Zoom H6, this doesn't really compare, which is reflected in the price. The device is extremely small and user friendly. Compared to handheld recorders it's still quite small, but you'd have to find equivalent small microphones like those capsules on Zoom and Tascam devices. The touchscreen is surprisingly good to use and responsive. I made hardly any mistakes navigating the UI. The extra USB port for backups is also brilliant because you can quickly plugin other devices. I was making presets on the device and I realized I could quickly plug in my computer keyboard, and it was a breeze. As a USB audio interface it works as intended, and it's nice to have a separate 3.5mm output in addition to the headphone output. For flaws, I will say the interface is slightly confusing because 32 bit means you have to think about gain staging differently; that's a 'flaw' that's present in any 32 bit recorder. I don't love the Sony battery solution, it makes it seem bulky (I haven't bought the Sony sled but I will soon). Lastly, switching bit depth (24 to 32 bit, for example) requires a device reboot. This makes sense, but it's annoying if you have to use it as an interface (which is usually best done at 24-bit for software/OS compatibility) and then want to record something at 32 bit. Overall this is an incredibly engineered device, and pack full of features. If you're looking for an upgrade to a handheld device and have proper external mics, this is as good as it gets.

Great for recording birds

By Jeffrey
Rated 5 out of 5
Date: 2023-01-04

I upgraded to the MixPre-3 II from a Zoom H4N. The interface is great and it's easy to use. The 32-bit float recording format makes it better to record in the field not having to worry about gain.

See any errors on this page? Let us know


Could this be used as an audio interface with 32 ...

Could this be used as an audio interface with 32 bit float and good digital preamps? Looking for an audio interface on windows, compatible with FL Studio DAW with 32bit float and good preamps. The only name that I hear is apollo twin duo from UAD, but user experiences complain about it being dysfunctional with Windows OS and FL Studio. Is there anything similar that is compatible with windows/fl?
Asked by: Kevin
Yes, the Sound Devices MixPre-3 II Audio Recorder can be used as a 32-bit audio interface with Windows.
Answered by: Matt Z
Date published: 2022-06-07

Can I connect this recorder directly to my GH5 so ...

Can I connect this recorder directly to my GH5 so that when I am recording video the MixPre-3 is automatically recording sound? In other words, so that I don't have to remember to start and stop the MixPre separately from pressing record on my camera?
Asked by: Todd
The MixPre-3 II uses record triggers via HDMI and/or timecode to automatically stop and start recording when the camera to which it is connected starts/stops recording. The MixPre-3 II should accept a record trigger from a GH5, but I would suggest testing this to confirm, as both camera and MixPre-3 II firmware changes over time can cause compatibility issues of which we may be unaware.
Answered by: Sound Devices Specialist
Date published: 2019-10-17

Does this allow separate level mixing for ...

Does this allow separate level mixing for recording and line out? For separate live streaming and post production uses.
Asked by: Michael
Hello Michael. The MixPre-3 II allows you to record individual inputs at specific levels, while also recording a left/right mix. Analog output gain can be adjusted as necessary for the AUX-OUT jack. However, all fader activity affects levels of recorded tracks and output levels.
Answered by: Sound Devices Specialist
Date published: 2020-12-02

Does this mean I get timecode in the stream plus ...

Does this mean I get timecode in the stream plus 3 input channels and the stereo mix?
Asked by: Tim
Yes it does. You can record on all 3 tracks and the stereo mix and embed time code on the 3 tracks plus the stereo mix.
Answered by: John
Date published: 2020-04-15

The specs say operating temperature of Mix Pre 3 ...

The specs say operating temperature of Mix Pre 3 II is -4 to 86°F . The Mix pre 3 goes up to 140°. Thats a huge difference. 86° is ridiculously low. Is that correct?
Asked by: Geoff
Per Sound Devices, the operating temperature range is -20 to 60 C, which is -4 to 140 Fahrenheit. I have sent a note to the web group for a correction.
Answered by: John
Date published: 2021-01-07

What is the correct cable to connect to camera ...

What is the correct cable to connect to camera from aux port for scratch track?
Asked by: Allen
1/8" stereo from the MixPre. Other end would depend on the camera.
Answered by: Michael
Date published: 2021-02-22

What accessory can I use to mount this on a mic ...

What accessory can I use to mount this on a mic stand or neck of a tripiod?
Asked by: Patrick
There is 1/4 inch thread in the bottom, just like you'd find in the bottom of a camera. Mount it directly to anything with a 1/4 screwpost. There is also a springloaded 1/4 post/bolt for the top, that lives recessed inside. Push a hex wrench up through a hole in the bottom, to pop it out on top and screw it into whatever you want to mount there. So you either need something with 1/4" post, or an adapter to 1/4". As an example, here's what I do much of the time for a static shot of a live music performance: 1. Turn camera upside down, then place MixPre upside down on the bottom of the camera. 2. Use the hex wrench to push the 1/4" post into the 1/4" thread of the camera, and tighten it down. Now the MixPre is mounted to the camera. 3. Place quick-release plate (for tripod) upside down on the MixPre, line up the 1/4" post of the plate with the 1/4" thread of the MixPre, and tighten it down. Now you have a camera and audio recorder in one unit, with a quick release plate for mounting on a tripod. To mount it on a mic stand... just need an adapter from your mic stand threads to 1/4" post.
Answered by: Jeremiah
Date published: 2020-05-12

How does this compare to the Zoom F6?

How does this compare to the Zoom F6?
Asked by: Elazar
I couldn't say you are asking about a product that has not even arrived yet. The F6 does not arrive till October.
Answered by: John
Date published: 2019-09-16
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