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Dayton Audio iMM-6 Calibrated Measurement Microphone for iPhone iPad Tablet and Android

Brand:| Model: iMM-6
Product Video
Turn your iPad, iPhone, or iPod touch into a laboratory grade audio measurement device with Dayton Audio's iMM-6 iDevice calibrated measurement microphone.
  • Precision condenser microphone for critical measurement
  • For use with Apple iPad, iPhone, iPod Touch via 3.5mm TRRS headset jack
  • Compatible with Android and Windows Phone devices with TRRS jack
  • Headphone/Line Out pass-through jack for test signals or listening
  • Kickstand feature elevates and angles device and microphone capsule
  • True omnidirectional pattern with calibrated flat frequency response
  • Rugged construction with high-quality components
Part # 
Weight: 0.15 lbs.  
Regular Price$16.25
Special Price
Part # 390-810
Qty:  EA
Available Payment Methods

Product Details

Dayton Audio iMM-6 Calibrated Measurement Microphone for iPhone iPad Tablet and Android

The Dayton Audio iMM-6 is a professional-quality measurement and recording microphone that is designed to work with the entire suite of Apple "iDevices" – iPad, iPhone, and iPod. The rugged construction and compact size make it the perfect companion for audio professionals who must work on-location performing acoustic analysis, monitoring audio levels, or recording. Each iMM-6 is individually hand-calibrated using a laboratory-standard measurement microphone, for consistent, repeatable measurements that match the level of precision previously offered only by expensive stand-alone microphones.

Dayton Audio's iMM-6 is also compatible with Android and Microsoft devices that use a 3.5 mm TRRS jack. A headphone/line-out is built in for monitoring the recorded signal, and a kickstand elevates and angles the measurement capsule for more direct measurements. Each iMM-6 is ruggedly built with high-quality components. A sturdy carrying case with foam insert is included.

A unique serialized calibration file is available for the iMM-6. This calibration file can be used by most audio-analysis apps for the iPad, iPhone, and iPod Touch (see compatibility list for recommendations). Visit Dayton Audio's website, where you will be prompted to enter the serial number from the case of your iMM-6. After entering the serial number, your download will start.

Specifications: • Capsule type: Precision 6 mm electret condenser • Polar Response: True Omnidirectional • Frequency response: 18-20,000 Hz (Calibrated) • Impedance: 200 ohms • Sensitivity at 1 kHz into 1K ohm: 10 mV/Pa (-40dBV, re. 0dB = 1V/Pa) • Maximum SPL for 1% THD @ 1,000 Hz: 127 dB • S/N ratio: 70 dB (A-weighted, varies depending on host device) • Connector: Gold-plated 3.5 mm TRRS • Weight: Ultra-light 7.6 grams.


Help for Android and iPhone users:

There are many applications in the market that provide the smart phone user with audio measurement software.  We do not recommend any specific apps, however, in an attempt to assist the new user of an iMM-6 we have listed links and some helpful pointers below.  One for the iDevice/iPhone platform and the other for Android devices.


AudioTools app (from Studio Six Digital):

Here is the procedure for loading the iMM-6 calibration file into AudioTools by Studio Six Digital on an iPhone:

 1)      You need a Wi-Fi network where you can view other computers on the network. You also need a laptop PC, or a desktop PC connected directly to the wireless router via either a cable or a wireless networking card. Your iPhone and desktop PC will need to be able to 'see' each other to transfer files. Your wireless router should not be blocking port 9900. (If you haven't set your wireless router specifically to do this, it shouldn't be blocking this port.)

2)      Make sure your iPhone has Wi-Fi enabled, and is connected to the same wireless network as your PC.

3)      On your PC, download the iMM-6 serial calibration file (found on the bottom of the iMM-6 aluminum container) for your specific microphone from and save it where you can easily locate it. You will need the serial number that is printed on the back of your iMM-6 carrying case to access the unique calibration file for your iMM-6.

4)      On the iPhone, within AudioTools, navigate to the Input Sources screen and choose Microphone Calibration. The Calibration Screen will be displayed.

5)      From the Calibration Screen, choose the Cal File option. Tap the Files button to bring up the Files screen.

6)      At the top of the Files screen, there is a field labeled "URL", with http:// and an IP address (sequence of four three-digit numbers), plus a port number following the colon. (example: – yours will probably be different)

7)      From your PC which is connected to the wireless network, open up your web browser and type the full URL from the "URL" field into the address bar of the web browser. (Following the example above, you would type into the address bar). This is the address for direct file transmission to your iPhone.

8)      You should see a page appear with the heading "Documents on Strider" or something similar. Your iPhone is acting as a server on your WiFi network, and is serving this page to your PC. Click on the "calibration" link, which will navigate you to the "calibration" directory on your iPhone.

9)      In the gray box labeled "Upload", click on the "Choose File" button to select your file. Find the iMM-6 calibration file you downloaded from in step (3) and double-click on it.

10)   In the gray box labeled "Upload", you should now see your iMM-6 calibration file listed. Click on "Send" to send the file to your iPhone. When done, the page will refresh and show your iMM-6 calibration file in the "calibration" directory.

11)   Close your web browser. You are finished with the part of the upload that uses your PC.

12)   On your iPhone, tap "Done" to return to the Calibration Files screen, and then tap the “Reload” button (round arrow) to refresh the view. You should see the calibration file appear.

13)   To load the calibration file, tap the calibration file name and then tap "Apply".

14)   The calibration file is now loaded. Tap "Done" to return to the Calibration screen.

These instructions are based on the instructions given on



AudioTool by Bofinit Corporation

AudioTool supports loading a calibration file for the Dayton Audio iMM-6 microphone. These files have names like "99-0101.txt" when downloaded from Dayton's website. For use in AudioTool, you will simply need to rename the file so that it has the .cal file type (e.g. "") and save it in the AudioTool directory on your Android phone. Then, in AudioTool, select the "Load Cal" option from the Menu, and choose the Dayton file from the list. The calibration data will be loaded, power summed to the 1/3 octave bins used by AudioTool, and saved in your Preferences - there is no further need to load the file whenever you start AudioTool, unless you change the calibration method or alter the calibration values manually.

Product Specifications
  • Element TypeCondenser
  • Polar PatternOmnidirectional
  • On/Off SwitchNo
Dayton Audio iMM-6 Calibrated Measurement Microphone for iPhone iPad Tablet and Android
  • BrandDayton Audio
  • ModeliMM-6
  • Part Number390-810
  • UPC848791000331
  • Product CategoryMeasurement Microphones
  • Unit of MeasureEA
  • Product Rating
    (16 Reviews)
  • Weight0.15 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Dayton Audio iMM-6 Calibrated Measurement Microphone for iPhone iPad Tablet and Android
Dayton Audio iMM-6 Calibrated Measurement Microphone for iPhone iPad Tablet and Android is rated 4.8125 out of 5 by 16.
Rated 5 out of 5 by from Wishbone Mic!Bought this mic after reading the rave reviews about how well it does vs other setups. Boy was this a great purchase. Without even using the calibration file the first thing I did was get AudioTool setup on my Note 2 and did a comparison for room noise. I launched the app without the mic to watch the frequencies jumpin all over the place like running on concrete on a hot day with no shoes. Then I started doing the odd stuff making sure that it was actually detecting the correct noises like whistling the Andy Griffith song and singing opera in the bathroom. Ok, so now fast forward to plugging in the mic and BAM, no more jumping frequencies all over the place. My silent room was actually a graph of near silence. I set it across the room to make sure I wasn't loosing my mind and starting typing and it picked it up with ease. I did all the same tests as before only to be amazed at how much more accurate it seemed. I did my research when getting this as the Note 2 has a Wolfson audio chip that immensely helps with things like noise and such and am glad that I did. I will be loading up the calibration file and giving this thing a real run soon.
Date published: 2014-04-03
Rated 5 out of 5 by from It behaves like it costs $600I've used very expensive RTA systems and this microphone is just as accurate in my opinion. I use it with the calibration that can be downloaded which does make a difference. You will not find a better deal period.
Date published: 2014-04-03
Rated 5 out of 5 by from Excellent ProductI purchased the IMM-6 Mic to use with the AudioTools suite on an iPad Mini. The IMM-6 mic has worked flawlessly and is more sensitive than the internal mic on the iPad. The output jack on the IMM-6 allows you to connect signal outputs for conducting tests like Room Impulse Response. I was able to download the mic calibration file from Dayton using my serial number and install it in AudioTools without any problems. Also, AudioTools makes it easy to disable the calibration file when the IMM-6 is not in use. Overall, this is a killer add-on and turns AudioTools into a portable lab of considerable quality for a very low additional cost. I expect that this product will be very popular among hobbyists who want great results without having to spend hundreds on additional test equipment.
Date published: 2014-04-03
Rated 5 out of 5 by from Absolutely a must have for DIY folks.I have had this mic for about a month now and had wished I had gotten it sooner! I am a veteran to the difficult car audio environment. It's a super challenging place to get instruments to sound life-like and this is a super tool that works. I run it through my iPhone and AudioTools software. I was amazed at the precision. Understand that I don't have other reference RTAs handy, but after I autoEQ a car, I go back with this setup and double check. It usually sounds good under autoEQ, but sounds great when refined with the help of the mic.
Date published: 2014-04-04
Rated 5 out of 5 by from Can't be beat for the price!!I picked this up to use temporarily while some other equipment was in the shop. I didn't expect to find the mic/tablet-or-phone combo to work so well, especially given the price I paid! I can ring out a room easily with this combo, and I can carry it in my pocket.Just for kicks, I set it up for direct comparison to my calibrated RTA mic, and once I adjusted to the calibration file for the iMM-6, I was amazed at how close they were.I may order more of these as presents for friends.I would definitely recommend this product for anyone with a smart phone or tablet, who needs to measure their audio environment!!
Date published: 2014-04-03
Rated 5 out of 5 by from Great value, versatile, works with a laptopI bought this to use with my laptop that has a compatible single jack for headphone/mic. I got this along with a proper compatible extension cable and TureRTA software. I also used a mic-headphone/Y adapter to loopback for soundcard calibration. All cables were easily found on Amazon and the whole setup with cables was less than $40.00. With the iMM-6 auxiliary output, I connected the mic to the aux input of my car stereo and was able to run test tones, pink noise and sweeps of my whole system using my calibrated laptop sound system. I could also get readings from individual speakers and find the crossover of the stock system. Looks like it worked pretty well and I am pleased with the results.NOW A WARNING-I was using this on a very dry day here in So Cal where there is a lot of static around. I had this set up on the driver side headrest for measurements. I slid into the back seat and touched the mic and BAM, big spark and I killed the mic. So be careful if you are using this in a car environment. Make sure you are grounded and shock-free before touching things. Bought another right away and re-ran the analysis in my car and got back the same results, so these are very consistent anyway. I think this is a great tool
Date published: 2013-12-03

Product Q&A

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Dayton Audio iMM-6 Calibrated Measurement Microphone for iPhone iPad Tablet and Android

Two questions: can this microphone be used with a 3.5mm extension cable? Also is this accurate enough to use with a new ipad (ipad 3) for car audio?

Asked by: kycaraudio
This requires a 4 conductor plug so a standard stereo 3.5mm cable will not be compatible. This should work fine for a car audio application.
Answered by: MattP
Date published: 2014-01-28

What else is necessary to use this item in speaker output analysis?

I ask this as someone who is new to speaker building.
Asked by: Psykodad
If used with a smart phone or any "iDevice" an app is required to view frequency response graphs. If used with a computer you will need software such as TrueRTA or Room EQ Wizard in order for this to work properly.
Answered by: MattP
Date published: 2013-05-03

New to Android...can someone recommend a good app for using this mic?

Asked by: bg17
I have a Android powered Samsung Galaxy Tab 2 and use it's built in mic with "AudioTool by Bofinit Corporation" and "Speedy Spectrum Analyzer by Electron Chaos" I am waiting for this Dayton mic to come off backorder yet so I can't attest to their compatibility. If you only need a simple spectrum analyzer Speedy Spectrum is pretty good but AudioTool does more and is my favorite of the two programs.
Answered by: Heavy Sixer
Date published: 2013-04-26

I'll restate my question for clarity :) Can this mic be used with a PC's soundcard/or usb mixer without the need of phantom power?

Asked by: GUCCI
It depends on your current sound card. I am using the microphone on the microphone input of a Dell M6700 notebook computer. I would say that if your computer/sound card has a microphone input you will be able to use this microphone on that input. However you will need to use an adapter cable to go from TRRS to TRS. You can find these on E-Bay
Answered by: dschlic1
Date published: 2013-11-01

Is the calibration file for vertical use or for pointing at the source. Those two choices require different cal files.

Asked by: oneoldude
The Mic is omni-directional, so it matters much less. I have not noticed much of a difference in where it is pointed, as long as it is not pointed away from the source.
Answered by: Spyders03
Date published: 2013-06-20

use with high spl

hello, in the specs it states "Maximum SPL for 1% THD @ 1,000 Hz: 127 db". question is. will it perform properly if I wanted to use the mic to check the spl in a really loud car audio system?Thanks
Asked by: DJMAMBO
The capsule limit for this microphone is 127 dB so it will only read SPL's at or under this number.
Answered by: MattP
Date published: 2013-08-26


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