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Azden SMX-30V Stereo/Mono Mixable Video Microphone

BH #AZSMX30V • MFR #SMX-30V
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Azden SMX-30V Stereo/Mono Mixable Video Microphone
Key Features
  • For Videographers and Vloggers
  • Stereo/Mono Capture with Stepless Mixing
  • 100-Hr Run Time via AA Batteries
  • 3-Step Gain and Bass Roll-Off Controls
With its fully variable stereo/mono capture capabilities and integrated swiveling shockmount, the Azden SMX-30V video microphone is well equipped to deliver the versatility needed by videographers and vloggers for recording high-quality dialogue and ambience to a DSLR, compact camcorder, or portable audio recorder. Two AA batteries (available separately) will power the mic for up to 100 hours and a coiled 3.5mm TRS cable is included for tidy and easy hookup to your camera.
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Azden SMX-30V Overview

With its fully variable stereo/mono capture capabilities and integrated swiveling shockmount, the Azden SMX-30V video microphone is well equipped to deliver the versatility needed by videographers and vloggers for recording high-quality dialogue and ambience to a DSLR, compact camcorder, or portable audio recorder. Two AA batteries (available separately) will power the mic for up to 100 hours and a coiled 3.5mm TRS cable is included for tidy and easy hookup to your camera.

Housed inside an innovative casing, the SMX-30V is two microphones in one—a stereo microphone equipped with two cardioid cardioid capsules at 90° angle, and a mono supercardioid shotgun element in a 4.5" interference tube. Use the stepless knob to choose stereo, mono, or a blend of both for the perfect balance of the subject and surrounding environment sound. Additionally, the 3-step gain control and 60 Hz low-cut filter help you achieve optimal tone and level for your recordings, so you can spend less time in postproduction.

Stereo/Mono Mixable
The first video microphone of its kind, the SMX-30V lets the user choose from using 100% of the stereo microphone, 100% of the mono shotgun microphone, or any mix in between. Recording a dialogue scene, but want to incorporate some of the environment's ambience? Mix in a little of the stereo microphone. Recording a musical performance, but want to tighten up the center stereo image? Mix in some audio from the mono shotgun microphone. The possibilities are endless.
Dual Microphone with Complete Control
The SMX-30V is like having a stereo microphone, a shotgun microphone, and an audio mixer all combined into one unit. To achieve this, there are three microphone elements in total: two located at the top, angled at 90° for capturing a realistic stereo image, and one inside a 4.5" interference tube for directional audio capture. Combined with a stepless mixing knob, you have complete control over how much signal from each microphone to send to your camera.
Swiveling Shockmount
Another unique feature on the SMX-30V is the integrated swiveling shockmount, which enables rotation of the microphone 30° to the left or right. This is a handy feature any time your sound source is not centered in-frame, allowing you to aim the microphone at your subject, thereby getting the most direct sound possible. In addition, the mount itself is designed to absorb vibrations and isolate the microphone from handling noise. The bottom of the mount allows for attachment to a standard camera cold-shoe slot, or via a 1/4"-20 threaded stud.
Improved Battery Life
Battery life in the SMX-30V has been improved over the previous model to last up to 100 hours on a pair of alkaline AA batteries (available separately).
Detachable Output Cable
Audio output via a 3.5mm TRS mini jack provides flexibility to connect various third-party audio cables. A high-quality, coiled microphone output cable is included with the SMX-30V.
3-Step Gain Control
The 3-step gain control has +20, 0, and -10 dB settings. Adding 20 dB of gain to the microphone output is a great way to overcome noisy mic preamps, or to simply boost quiet audio. Reducing the gain by 10 dB is most useful to protect against distortion in loud environments.
Low-Cut Filter
When engaged, the low-cut filter (or high-pass filter) reduces low frequencies below 60 Hz. This can be helpful in mitigating low-frequency noise from sources such as HVAC systems, wind, or passing cars.
Auto Power
Setting the power switch to "Auto" will turn the microphone On and Off with your camera automatically, saving you from losing a great take and conserving battery.
Foam Windscreen
Slip the supplied foam windscreen over the SMX-30V to reduce noise caused by fans and light breezes.
UPC: 095528730058

Azden SMX-30V Specs

Key Specs
Microphone Type
Shotgun (Stereo)
Polar Pattern
Cardioid / Supercardioid
Element Type
3x Condenser
Controls
Gain/Sensitivity, Low Cut/HPF, On/Off, Polar Pattern
Frequency Response
40 Hz to 20 kHz
Maximum SPL
126 dB (1 kHz, 1% THD)
Analog Output
1x 1/8" / 3.5 mm TRS Female (on Mic)
1x 1/8" / 3.5 mm TRS Male (on Included Cable)
Power Sources
Battery
Microphone
Microphone Type
Shotgun (Stereo)
Polar Pattern
Cardioid / Supercardioid
Element Type
3x Condenser
Sound Field
Mono / Stereo
Orientation
End Address
Controls
Gain/Sensitivity, Low Cut/HPF, On/Off, Polar Pattern
Pad
No
Filter & EQ
Low-Cut Filter: 60 Hz, 3 dB/Octave
Circuitry
Solid-State
Performance
Frequency Response
40 Hz to 20 kHz
Maximum SPL
126 dB (1 kHz, 1% THD)
Dynamic Range
118 dB
Connectivity
Analog Output Connector
1x 1/8" / 3.5 mm TRS Female (on Mic)
1x 1/8" / 3.5 mm TRS Male (on Included Cable)
Power
Power Sources
Battery
Operating Voltage
3 V
Battery Type
2x AA (Not Included)
Physical
Mounting Thread Size
1/4"-20 Female
Dimensions
H: 4.4 x W: 1.9 x L: 6.1" / 11.1 x W: 4.7 x L: 15.4 cm
Weight
5.6 oz / 160 g
Packaging Info
Package Weight
0.8 lb
Box Dimensions (LxWxH)
7.6 x 5.4 x 3.3"

Azden SMX-30V Reviews

Mic MUST be Defective—On-Camera Mics Can’t be This Bad!

By Mark
Rated 1 out of 5
Date: 2025-06-15

I purchased this for the “good” claimed specifications and the fact that it is pre-amplified and can offer +20dB of gain, giving me the option to completely bypass the deficient mic preamps in the Panasonic S1RII. I had been using a Tascam TM-2X microphone. It gave good audio on my Sony RX10 Mk III, so naturally, I transferred it to the S1RII but was suddenly disappointed with the glaring lack of bass in my recordings on that camera. The TM-2X is rated 50-20,000Hz, but it must be flat to 50Hz, because it has much more bass than the Azden. Enter the Azden microphone. With it’s dual pattern capability, on paper, it looks to be the ideal mic. And a claimed audio response from 40-20,000Hz, I fully expected that with it’s output connected to the relatively flat LINE input on the S1RII, that I would finally have good audio on this camera. Sadly, that wasn’t the case. The Azden microphone is already down about 12dB at 40Hz, making the specs appear to be false claims. Normally a microphone is FLAT across the specified audio range. But that’s not the only problem. This mic has no highs either! It’s got the audio quality of the old dynamic microphones from the 1960s—the ones that come with the $39 cassette recorders of that era. Yes, it’s THAT bad. And compared against reference studio condenser mics, it’s like night and day. Like comparing a $5 microphone to a professional studio mic. The Azden is a bulky contraption, but I could live with it if it’s audio quality were up to manufacturer claims. Or, perhaps I received a defective unit. Azden expects you to use this high output microphone on the Mic input of your camera, which will overload easily, even if you turn down the camera gain. The Azden claims to have a maximum output of just over +10dBm, which is LINE level. Combined with the bass rolloff of the S1RII’s mic preamps, this Azden simply sounds like telephone quality audio on the low end. Before anyone says “did you check the wind/HPF settings” yes, I turned of Wind filter in the camera and set the Azden to the “flat” position. So either I have received a dud, or the mic is really just intended to capture voice in very windy conditions.

Best mic I ever used!

By Lars-Goeran
Rated 5 out of 5
Date: 2021-06-18

It catched crystal clear audio in full stereo, mono and mixed. It is also easy to use. But I was a little bit disappointed then the battery was empty after a night in automatic mode. I now know it consume power in auto also, but not so much. A minor problem.

See any errors on this page?

Can I use this mic with my computer? I have an ...

Can I use this mic with my computer? I have an iMac and want to use it with my screen recording software to create tutorials. I purchased the audio jack to USBC cable to connect to my computer, but the computer isn't recognizing it.
Asked by: Manda
Yes, the SMX-30V can be used with a computer provided you have the appropriate adapter or USB audio interface. Most USB-C audio adapter cables are meant for use with smartphones, and may not work with the computers in the same way. There are many 3rd party solutions available on the B&H website, I am sure a sales person can direct you towards a USB audio adapter that is suited for your needs.
Answered by: Azden Expert
Date published: 2022-01-06

Why is the bass response of this mic so poor? ...

Why is the bass response of this mic so poor? Spec says it goes down to 40Hz. Also, there's little highs compared to my old mic.
Asked by: Mark
The Azden SMX-30V Stereo/Mono Mixable Video Microphone (BH # AZSMX30V) offers a frequency response of 40 Hz to 20 kHz which approaches the limits of human hearing at the top end.
Answered by: Mark S
Date published: 2025-06-15

I guess this mic can be used on iPhone as well & ...

I guess this mic can be used on iPhone as well & monitor the sound via a Bluetooth headphone. Correct me if I am wrong?
Asked by: Rho
Not all video and audio recording apps allow for live monitoring. Furthermore, monitoring via Bluetooth may involve some latency. As for the SMX-30V, connecting it to an iPhone will require the Apple lightning to headphone adapter, plus a TRRS adapter cable. However, connecting this way will not allow for stereo recording.
Answered by: Azden Expert
Date published: 2023-04-14

Are 1.2V rechargeable batteries compatible?

Are 1.2V rechargeable batteries compatible?
Asked by: Samuel
Yes, but we do recommend alkaline batteries for best performance.
Answered by: Azden Expert
Date published: 2022-07-11

How bad is the self noise level when connected to ...

How bad is the self noise level when connected to a Sony a6600 camera? Which microphone has the least self noise; this one or the SMX-30?
Asked by: Thomas
The Azden SMX-30V Stereo/Mono Mixable Video Microphone and the Azden SMX-30 Stereo/Mono Switchable Video Microphone have similar specifications in reference to self noise, with an identical signal to noise ratio spec of 82 dB (1kHz). While we have not tested either mic directly with the Sony a6600 Mirrorless Camera, they should both work well, although a bit of self noise is expected in general.
Answered by: Matt Z
Date published: 2022-02-02
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