This is a common question for those setting up or fine-tuning a sound system. And the answer is: Yes, you can use impedances higher than the minimum indicated by the amplifier without any problems.
Understanding in practice:
Imagine your amplifier delivers 1200W RMS at 4 ohms per channel. If you connect an 8-ohm speaker, the system will work normally, but with reduced power — in this case, around 600W RMS. This happens because, when impedance increases, current decreases, which reduces the delivered power.
And if it’s below the minimum impedance?
That’s where the problem begins. Using a load lower than the minimum recommended impedance (for example, connecting 2 ohms to a channel that requires 4 ohms) can overload the amplifier, potentially leading to:
Product overheating
Output protection
Output stage damage
Product failure
For this reason, respecting the minimum impedance is essential to ensure the system’s safety and performance.
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