the speaker I bought said something like 800 ohm 5W, 8 ohm 25W or 8 ohm 25W.is there a formula or something to calculate.
do you have the reference number of the speaker?the speaker I bought said something like 800 ohm 5W, 8 ohm 25W or 8 ohm 25W.is there a formula or something to calculate.
it just some china-made speaker, no reference number, but i found something similar like this:do you have the reference number of the speaker?
how do you calculate all those number?Those are very small 8 ohm speakers. The 50mm one has a max power rating of only 0.25W.
The max power might be its peak power so then its max RMS power from a sine-wave is only 177mW.
Then the RMS current at max power is 149mA RMS.