The impedance minimum could end up much higher than the znom, but even for more sensitive home theater amplifiers rated at say 4 ohms minimum load, a few frequencies that play closer to 3 ohms is no big deal. I have run cheap-o mb quart 4channels at 1.3 ohms nominal with no issues, except the extreme damping factor loss obviously.
Only way to know for sure is to see an impedance graph of that speaker. My guess is you're fine
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