I inserted ‘real life speaker load’ into Google search and got this fascinating AI explanation. I was intrigued by this term that I read above. The AI info is less than helpful and doesn't really answer things very well.
AI Overview
A real-life speaker load is more complex than a resistive load, which is what amplifiers are usually measured against. Here are some things to consider about speaker loads:
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Impedance
A speaker’s impedance varies depending on the frequency it’s playing. The stated impedance is usually measured at 400 Hz, but a speaker’s impedance can vary widely across the frequency range. For example, a speaker’s impedance can be up to five times its rated impedance at its resonant peak.
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Acoustic load
The acoustic load a speaker experiences depends on how it’s coupled to the surrounding structures and cabinet. For example, a speaker placed in a horn will have a higher acoustic impedance than a speaker in free space.
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Power handling
Using an amplifier that’s too small and driving it to distortion levels can damage a speaker.
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Matching speakers to amplifier
It’s important to match the power output of your amplifier to your speakers. If your speakers are underpowered, the sound will be thin and hollow. If your speakers are overpowered, they could distort and become damaged over time.
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Calculating speaker load
When speakers are connected in series, you can add the nominal impedance of each speaker together to calculate the total impedance.