Maximoam85 wrote: "almarg: suggestion is a good diagnostic but I am hesitant for fear of invalidating the warranty (they are new speakers) and/or damaging the speakers."
The 1.5 volts almarg suggested translates to less than 3/10ths of a watt into the Strada’s nominal 8 ohm load, and the speaker is rated at 150 watts. The crossover will route the battery’s DC current to the midwoofers; the tweeter will not see any of it. In other words, what he suggested is perfectly safe and would give you valuable information.
Every speaker I make is polarity-tested with a comparatively brutal 9 volts (ten watts into 8 ohms), because once upon a time I shipped a speaker with the woofer's polarity inadvertently reversed due my using the wrong color wire coming from the crossover board. In other words, it can happen.
I can understand you wanting to go to the dealer regardless of what the battery test reveals, because opening up the enclosure might very well void the warranty. But the battery test that almarg suggested is safer than playing them at normal volume.
Duke