Standard PC Audio Jack Output Power: Comparing Wattages for Motherboard Integration & Amps

Question

Hello. does any of your colleagues know how many W has the standard audio output from the PC? I know there is 0.5w in the phone. I think there are more in pc. When there is a 2x3w amplifier for a PC, then at half the volume the distortion begins, and the phone's volume level is Max and it is...

elektryku5 · Answer

When connecting an amplifier, the amplitude at the output is more important, and yes, the PC can have a larger one, because the impedance at the input of the amplifier is high, unlike, for example, headphones.

sylweksylwina · Answer

The power depends on many factors, including on the impedance of the connected receiver - in the case of an amplifier it is a value so large that the power is practically not lost anywhere.
In this case, we can talk about the level of the output signal, i.e. voltage, not power. It would be best to measure it at the output of the sound card, although such a typical value when it comes to the output signal level of various audio equipment is around 2 Vp-p. Unfortunately, without measurements under specific conditions, one can only assume what the maximum output power will be, or study a specific application of some integrated audio codec on the motherboard.

elektryku5 · Answer

You can always create a file with a sine of 50-100Hz 0dB and measure the voltages with a multimeter in both cases (lower or higher frequencies do not make sense, because for an ordinary multimeter it can be a problem).

DriverMSG · Answer

It all depends on the music card itself. For example, Realtek gives specifications from 2 to 3W. Example:

pawel45sw · Answer

I wanted to know this, because in one computer I have a built-in 3w 4ohm speaker and I wonder if it can be connected without an amplifier.

pitrala1 · Answer

You can, only after a short time you will burn the sound card. It is not adapted to such a low impedance load.

In any case, I do not recommend it. Older, much older sound cards sometimes had 2 outputs, one of which was adapted to passive speakers, but that was ages ago.

pawel45sw · Answer

What if there was anything else to charge the sound card? The second speaker, for example? The motherboard is asus a7v8x-x. The amplifier was connected to the front panel, because the connector was free. In general, I'm going to put a music card there, because the drivers keep breaking down all the time. I don't remember the name of the card, but it's a soundblaster from Creative.

pitrala1 · Answer

The only thing you can put in a loudspeaker, e.g. from large headphones, is 32Om minimum. Drivers corrupt, i.e.?

pawel45sw · Answer

I had a big problem with the sound. I tried different drivers and none of them wanted to work. Eventually it caught on and there was a sound. However, at some point he disappeared by himself. It is not on the built-in speaker or the external one. That's why I want to put a music card there.

Standard PC Audio Jack Output Power: Comparing Wattages for Motherboard Integration & Amps

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