Speaker Polarity5.3 - App Store

This app is a speaker polarity tester. Find out if your speakers are wired correctly (in phase or out of phase). Test your surround speakers, stereo speakers, PA speakers, in fact any speaker with wiring terminals on the back.

This speaker polarity tester was designed by the same people who built the Audio Toolbox, and the polarity tester in that unit was known as the most accurate and reliable polarity tester available. Now that technology is available in your iPhone.

Use this app to test your home speakers, recording studio monitors, home theater systems, car audio systems, or as part of your professional contractor work. Speakers wired backwards are the most common error in sound system setup, cause big problems, and are easily corrected. This app will give you the answers, no matter how difficult the wiring may be to trace.

Speaker Pop works by watching for a proprietary "pop" sound from the speaker, and doing DSP analysis of the sound to determine if the speaker cone is moving in the correct direction.

For iOS devices with headset jacks, as long as you use a standard 1/8" stereo plug, you can use any normal 1/8" to RCA adapter to get the signal into your system. You can also to record the "pop" test signal to a CD, DVD, or another iPod, and play this signal through your speakers.

We also support both Bluetooth and AirPlay streaming of the test signal to any device which supports one of these protocols.

If you are working on a home theater system, download our Apple TV app "Surround Generator". This app includes the Speaker Polarity signal, and can route the signal directly to any 5.1 or Atmos 9.6.1 speaker.

Speaker Polarity works with iAudioInterface and iTestMic2.

There is automatic adaptive technology to support any speaker type, Woofer, Midrange, or Tweeter, so you will get reliable readings.

Once you have the test signal coming out of the speaker, position your phone near the speaker (we suggest you flip it over to point the internal mic directly at the speaker -- the display will flip). In a few seconds you will get the reading on the screen, either a Plus or a Minus. Plus indicates correct speaker polarity, Minus means you need to swap the wires coming into the speaker.

We also have stereo and surround test signals available for download from our web site which are ready for burning to USB stick, CD, or DVD. See our web site or for more information.

See our other audio apps: AudioTools, our premier audio and acoustics test and analysis app, SPL, the professional grade sound level meter for the iPhone, SPL Graph, for recording SPL over time, RTA, a 1/3 octave real time analyzer, FFT, for detailed acoustic analysis, ETC, the Energy Time Curve app, RT60, for automated octave-band decay time analysis, and Generator, the iPhone signal generator. Watch for more coming soon.

Version History -Bug fixes and stability improvements
-Support for latest iOS versions 5.3 Sep 11 -Bug fixes and stability improvements 5.2 Jul 9 -Fixed a possible crash on launch 5.1 12/26/2025 -Bug fixes and stability improvements 5.0 12/22/2025 -Updated for new iOS devices
-Bug fixes and stability improvements 4.9 11/24/2025 -Added Bluetooth and AirPlay support
-Improved UI display on large-screen devices 4.8 05/07/2025 -Updated for latest iOS devices and calibrations
-Bug fixes and operational improvements 4.7 11/21/2024 -Added support for AirPlay and Bluetooth signal output 4.6 09/09/2024 -Updated for latest iOS devices and calibrations
-Bug fixes and operational improvements 4.5 07/10/2024 -Updated for latest iOS devices and new iOS versions
-Bug fixes and stability improvements 4.4 10/19/2023 -Bug fixes and improvements
-Support for more iOS devices and iOS versions 4.3 07/13/2022 -Bug fixes and stability improvements
-Updated for latest iOS and devices 4.2 09/24/2021 -Bug fixes and stability improvements 4.1 02/04/2021 -Bug fixes and stability improvements
-Support for latest devices and iOS versions 4.0 08/21/2020 -Updated Speaker Polarity for compatibility with iOS 13 3.6 10/09/2019 -Updated for any iOS 9 or later
-Fixed issue with setup menu
-Bug fixes and stability improvements 3.5 08/13/2019 -Updated for latest iOS devices
-Bug fixes and stability improvements 3.4 04/09/2019 -Updated for iOS 12 and latest iPhone XS and iPhone XS Max models
-Bug fixes and stability improvements 3.3 10/04/2018 General
- Added Calibration Error Report link to support page
- Fixed crashes on iOS 8 and iOS 9
- Fixed issue with multiple Studio Six Digital apps trying to access our accessories
- Updated App Store in-app purchase accessing and authorization for iOS 11


Live Calibration Updates
- Added cloud-based database for all iOS devices that can be updated in real time
- All devices included
- Includes local default files, in case a device has no internet connectivity
- Different databases for each major iOS version, starting with iOS 10
- New iPhones added to live calibration database 3.2 09/29/2017 -Bug fixes and stability improvements 3.1 08/30/2017 -Updated for iOS 9 & 10 3.0 10/12/2016 ** Updated test signal

** Improved detection algorithm, no longer need to pick speaker type 2.5 09/13/2012 ** Fixed output for iOS 5 and later 2.4 08/31/2012 Updated for iOS 4 compatibility. 2.3 06/27/2010 ** Built for OS 3.0

** Improved speaker selector filters for more reliable results
Tools. 2.2 03/26/2010