Check your speakers are in phase with this handy app!

The PhaseCheck app will run a test signal through your sound system to ensure your speakers are in-phase and wired with the correct polarity. It can be run either manually or automatically. Manual mode allows you to run the test signal and flip the phase so you can listen yourself to ensure your sound system is setup correctly. Automatic mode will run a series of test signals through your sound system and use the microphone on the device to analyse the results.

You should check the phase of your sound system whenever the wiring has been changed to ensure everything is the correct polarity.

When a sound systems speakers are out of phase the sound quality is affected massively. Bass is reduced significantly and stereo imaging gives the illusion of the sounds pulling outside of the room.

To run the check connect your iOS device to your sound system so it can play audio. If possible place the iOS device evenly between the speakers. Phase cancellation will not occur close to the speakers so ensure the device is not too close. Ensure the volume is at a comfortable listening level and if possible ensure there is no background noise to interfere with the scan.

What’s New

Version 1.0

This app has been updated by Apple to use the latest Apple signing certificate.

Ratings and Reviews

1.0 out of 5
3 Ratings

3 Ratings

Seanm57 ,

Doesn't output audio through Bluetooth

Wish the description had said this. Would have saved me a buck. Plays tones out through phone speakers. That doesnt do any good.

Zach-Daniels ,

Does not work with newer cars.

My car is usb or bluetooth only and this app will not work. Car needs an aux jack. And a phone with headphone 3.5mm output

Andyroo1984 ,

Doesn’t work

Says it doesn’t know if out of phase. Useless 👎🏿👎🏿👎🏿

App Privacy

The developer, Audiodog, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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