Connecting 8 Ohm Loudspeakers to 4 Ohm Powermixer: Matching 2x500W Amplifier Power

Hello.
Can I connect 8 ohm loudspeakers to a 4 ohm powermixer?
If so, with what loudspeakers power to match the powermixer with a power of 2x500 W?
Thank you in advance for your help.

Hello!
Yes, 8? speakers can be attached to an amplifier with a permitted 4? load, but the speakers should have a nominal power equal to at least 50% of the amplifier's power, so that they will not be hurt.
I recommend a small calculation:
- the 500W for 4? amplifier gives a voltage of ? (500 * 4) = 45V on its output,
- the 250W / 8? loudspeaker will reach the nominal power when it gets ? (250 * 8) = 45V - so it is "tight", it is not beneficial, because the amplifier can be excited if someone puts the microphone on too close to the loudspeaker ...
The 300W / 8? loudspeaker reaches the nominal power at 49V, so there is a margin, the loudspeaker should be able to withstand this amplifier (although it may also be too weak with excitation).
If the column is powered with a voltage higher than the nominal one resulting from power and resistance [formula: U = ? (P * R)] then the excess power (excess voltage) will be converted into distortions and heat, possibly smoke ...

Thank you for your answer.
As I understand it, if 300W can still be too weak then 350W will be ok? Will excess power (voltage) hurt the amplifier?
kisses

The source of voltage is an amplifier, not loudspeakers!
It is the excess voltage given by the amplifier that can damage the loudspeakers, not the other way around! On the other hand, too low resistance of the loudspeakers can damage the amplifier (and the loudspeakers too).

The sources and receivers can be described in various ways, but usually by 2 parameters, e.g. voltage and power, or resistance and power, or voltage and current. A user who knows Ohm's law can calculate the others from these 2 parameters and can estimate whether these devices can cooperate with each other without harm.

Welcome back.
Rzuuf: take into account that you are talking to a man who is unfamiliar with these matters and therefore asks.
I think that you cannot choose infinitely large loudspeakers (high power) just for the reserve, because the amplifier will also get "tired" there?
I don't know, but I'm guessing.
I know that on forums there is a tendency to answer: "how can you not know such elementary things - it was in elementary school", or "you have a formula here and calculate for yourself". I assure you that you can calculate yourself and still not know what these calculations are. I think that this is what internet forums are for, to help myself - obviously not to do it, but as a humanist I don't need to know anything about electronics, so I look here. An electronics technician, if he wants to interpret a literary text, does not have to learn about oxymorons, parallels and such strange words from the beginning - he will look at the forum and ask for help.
To the point:
Can I choose infinitely large loudspeakers for the 2x500 W amplifier without damaging the amplifier (I do not go into the economic sense)? Your answer has taught me what the minimum must have, I'm still interested in whether there is a maximum. Too low column resistance in relation to the 4 ohm amplifier is e.g. 2 ohms?
Thank you very much for the time and patience so far, and please continue.
kisses

1. The amplifier must NOT be loaded with less resistance than allowed. The reason is simple: lower resistance will cause more current to flow and the transistors behave like fuses: they will burn.
2. The speakers MUST NOT be less powerful than the amplifier. The justification is simple: the nominal power of the loudspeaker is the power that the loudspeaker can transform into sound without distortion and without damage. If the amplifier gives the speaker more than it can convert into sound, then the "excess" power will be converted into distortions and heat (possibly smoke).

From the above information, 2 rules follow: the first - the loudspeakers must not have a resistance lower than that allowed by the amplifier (so 2? for a 4? amplifier is unacceptable, because it may damage both the amplifier and the loudspeakers), but they CAN have any higher resistance, that is 4? ... 8? ... 40? ... 40000? ... infinity.
Second rule: the loudspeaker MUST have the power rating at least equal to the power rating of the amplifier (i.e. it can always be higher). If you give a loudspeaker much lower power than its nominal power, then the loudspeaker will sound quieter than its maximum capacity - after all, we don't have to listen to everything "at full power", but nothing bad will happen.
Thus, even a 1000W speaker can sound beautifully "driven" by a 1W amplifier - provided that its resistance is accepted by this amplifier.

Convert the power and resistance to voltage and see if the amplifier "threatens" the column with too high voltage - it's like trying to light a 12V bulb from a 20V source - you know what will happen?

Thank you very much. Believe me, a layman needs more and clearer explanations. Thank you once again.
kisses