One Alto Black 15 is slightly louder and has a different frequency response to the other!

I have a pair of Alto Black 15 full-range speakers but their frequency response and output is slightly different to each other! I have heard that if you alter the eq or level with the Alto Livedrive app and then power the speaker down then it will retain these settings when you next use the speaker. I have reset the speaker to the default settings by holding down the dsp button until the leds flash but it is still the same! Does anybody have any idea if resetting the speaker to default would over ride any settings that may have been altered previously in the Alto Live Drive app? Unfortunately the app is no longer available so I cannot check this out myself.
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