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Sound Devices MM-1 Single-Channel Portable Microphone Preamp

BH #SOMM1 • MFR #MM-1
47 reviews
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Sound Devices MM-1 Single-Channel Portable Microphone Preamp
Key Features
  • Compact Design
  • XLR Input
  • Phantom Power
  • 1/4" Headphone Jack
The Sound Devices MM-1 is a single-channel, portable microphone preamp and headphone monitor designed for monitoring sound for film (boom operators), broadcast and ENG, field recording, voice-over work, and corporate/industrial environments. The mic preamp features exceptional audio quality, with a dynamic range exceeding 120 dB and an audio bandwidth from 10 Hz to 50 kHz.
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Sound Devices MM-1 Overview

The Sound Devices MM-1 is a single-channel, portable microphone preamp and headphone monitor designed for monitoring sound for film (boom operators), broadcast and ENG, field recording, voice-over work, and corporate/industrial environments. The mic preamp features exceptional audio quality, with a dynamic range exceeding 120 dB and an audio bandwidth from 10 Hz to 50 kHz.

The balanced XLR microphone input provides user-switchable +48, 12V, and 12V-T phantom power. A separate, balanced monitor input accepts balanced or unbalanced line-level signal. The 1/4" TRS headphone output is capable of monitoring microphone signal, external line-level signal, or a mix of both. A 3-position low-cut filter switch eliminates noise below 80 and 160 Hz. The compact unit features a belt clip and is powered by separately available 2 AA batteries or external DC power source.

Compact & Portable
The MM-1 microphone preamp is compact, lightweight, and features a belt clip, allowing comfortable operation for field audio engineers
Versatile Monitoring
A separate input accepts line-level signal and the headphone output is capable of monitoring the mic input signal, line input signal, or a mix of both
Peak Limiter
Peak limiter eliminates noise and distortion caused by signal overload
Low-Cut Filter
A 3-position low-cut filter switch eliminates noise at the 80 and 160 Hz frequency ranges
Superior Audio Quality
The transformer-balanced mic input and premium electronics yield a dynamic range exceeding 120 dB with a 10 Hz to 50 kHz audio bandwidth
UPC: 859108005420

Sound Devices MM-1 Specs

Inputs
1 x 3-Pin XLR Female Mic Input
Output
1 x 3-Pin XLR Male Line Output
Monitor/Headphone Out
1 x 1/4" / 6.3 mm TRS Phone
ALT I/O
1 x 1/4" / 6.3 mm Monitor In
Link Input/Output
No
Impedance
Mic In: 2 Kilohms
Monitor In: 22 Kilohms
Line Out: 130 Ohms
Headphone Out: 200 Ohms
Gain
0 to 66 dB, Selectable
Hum & Noise
-126 dBu (EIN)
Frequency Response
20 Hz to 20 kHz (+0.1, -0.5 dB)
Distortion
0.05%
Metering
Power and Limiter/Peak LEDs
Control Voltage Out
No
Phantom Power
+48 V, +12 V, and +12 V-T
Operating Temperature
Not Specified by Manufacturer
Power
2 x AA Batteries (Not Included)
5 to 17 VDC Via Threaded Coaxial Jack
Dimensions
1.95 x 3.75 x 6.55" / 49 x 95 x 166 mm
Weight
1.42 lb / 0.64 kg
Packaging Info
Package Weight
2.33 lb
Box Dimensions (LxWxH)
10.4 x 7.4 x 4.1"

Sound Devices MM-1 Reviews

Absolutely Superb!

By Richard
Rated 5 out of 5
Date: 2021-10-17

This is one of the best audio purchases I've ever made. It's one of the cleanest devices I've ever heard (or not heard. . . .) It is an amazing amount of gain in the preamp, it easily drives any pair of headphones I own, and it's built like an absolute tank. It's the perfect belt pack for a boom operator. Another winner for Sound Devices!

MM1 with H6

By Angelo
Rated 5 out of 5
Date: 2018-12-28

In response to kylmor since there is no reply buttom. In order to get the best results from the MM1 and the H6 you have to turn down the monitor mixer down int the h6 settings to -6 or -12 db and you will be golden. Sound is amazing that way even with a dynamic mic. I happened to figure this out yesterday bc i was getting to much background noise when using both devices, i knew it could be better. Now the sound is very good with no noise at all. Hope this helps some of you.

See any errors on this page?

What's the battery life like, with phantom power ...

What's the battery life like, with phantom power turned on, and assuming fully-charged eneloops?
Asked by: eric
According to the Sound Devices Manual, to give you a ballpark figure, with Duracell AA MN 1500 Alkaline batteries with a condenser microphone (48V) and 75-ohm headphones at high levels, you can expect about 8 hrs. of run time. It's always good to do your own testing.
Answered by: David
Date published: 2023-02-28

Does this come with a belt clip (preferably ...

Does this come with a belt clip (preferably metal), or can one be purchased separately?
Asked by: Dale
Yes, the Sound Devices MM-1 Single-Channel Portable Microphone Preamp comes with a metal belt clip.
Answered by: Michael S
Date published: 2025-02-02

If I buy this MM1 device, can I use it with the ...

If I buy this MM1 device, can I use it with the MIX PRE-3 II or do I no longer need it? Please help
Asked by: Carlos Hugo
You indeed could either use the MM1 preamp to feed a line level input in the MixPre-3 II or you could use the MixPre-3 II's preamps alone. Both preamps are fantastic and transparent, so it rather comes down to if you prefer the nuances of one over the other. In terms of need, the MixPre-3 II doesn't require any external preamps to function as it itself can very well amplify source content.
Answered by: Sound Devices Specialist
Date published: 2021-11-05

question

Will this work to provide line level control and phantom power to an Alexa Mini, and if so, what other components would be needed to ensure it works well?
Asked by: Steve
Yes, you need to make sure you have the appropriate phantom power setting; 48volt is the most common, and make sure your Alexa is set to line level input. All you need is 2AA batteries, a microphone, and two XLR cables. One to connect the mic to the MM1, and another to go out of the MM1 to the Alexa. Recommend energizer ultimate lithium batteries. They'll last days.
Answered by: Alvin M.
Date published: 2023-04-27

question

How do I use the included DC connector? Do you plug a cable into it?
Asked by: Phillip
Solder it on to a wire supplying 12vdc. or purchase the Sound Devices supply for it.
Answered by: William B B.
Date published: 2018-08-27

question

what cables do I need to hook this up to my 70d??
Asked by: kiki z.
Looks like you'll need to purchase a XLR F to 3.5mm (mono) male cable. The output of the SD MM-1 is Line level. So, the cable will need to be the type that can attenuate line level down to Mic level for the 70D to receive.
Answered by: aaron b.
Date published: 2019-12-06

question

the monitor headphones is mono or stereo?
Asked by: lucas D.
This is a mono device, but you can monitor using stereo headphones
Answered by: Nelson S.
Date published: 2018-08-27

question

If I used this preamp with a recorder (TASCAM DR-40) at what setting should I put the audio gain in the recorder? I will be using it with a pro camcorder two, which has its own audio gain manual control, what gain setting should I use there too? Or should I adjust it while monitoring until I reach my sweet spot ?I'm still in the learning process.Thanks in advance :)
Asked by: FAISAL
Hello, I personally use an H4N so i'm not entirely sure how high the noise floor for the TASCAM DR 40 nor the Pro Camcorder. May be a silly question but have you tested the two yet? From what i've heard (friend's experiences) the Tascam has a pretty low noise floor. Both having pretty good preamps you may not need the MM1. Typically you should try to keep your recorder level below 60, but it also depends on your mic as well. Depending on the quality of your mic will determine your levels. And yes you should always be monitoring during live recording, since every environment, voice, etc, will change how you adjust your audio settings.Hope I helped a little. I'm always in the learning process too, keep on going!
Answered by: kirk w.
Date published: 2018-08-27
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