4 réponses
Hello,
The jack inputs on a PC correspond to a microphone input, a headphone output, and on older towers, often a line output.
Only the outputs produce a few millivolts to power a headset or connect to amplified speakers or a hi-fi amplifier.
https://blog.son-video.com/2019/07/comprendre-limpedance-et-la-sensibilite-des-casques-et-ecouteurs-audio/
For headphones, the sound level depends on the impedance (resistance measured when passing a signal). With certain European headphone brands (Sennheiser, Beyer, AKG), the impedance is higher (300 ohms) than with Japanese or Asian brands or other international ones (Sony, Audio-Technica, JVC, Philips, JVC, etc.), which range from 8 to 50 ohms.
As a result, the maximum volume may be less significant on average impedance headphones, regardless of quality. In this case, the power (in milliWatts, i.e. volts x current) provided by the sound card matters when indicated; again, this is unrelated to quality.
Therefore, there is no reason to use an external sound card, but it is better to use a suitable headset, or as a precaution, to choose a low impedance model.
For microphones, which correspond to a voltage of a few millivolts, impedance is also a concern, and it's important to match the microphone's impedance to that of the PC input. Values range from about 50 ohms to 600 ohms.
Some microphones (electret, condenser) include a preamp, which generates a higher output level. In the case of electret microphones, which belong to the entry-level category, this does not imply better quality compared to other types of microphones (dynamic).
Best regards.
The jack inputs on a PC correspond to a microphone input, a headphone output, and on older towers, often a line output.
Only the outputs produce a few millivolts to power a headset or connect to amplified speakers or a hi-fi amplifier.
https://blog.son-video.com/2019/07/comprendre-limpedance-et-la-sensibilite-des-casques-et-ecouteurs-audio/
For headphones, the sound level depends on the impedance (resistance measured when passing a signal). With certain European headphone brands (Sennheiser, Beyer, AKG), the impedance is higher (300 ohms) than with Japanese or Asian brands or other international ones (Sony, Audio-Technica, JVC, Philips, JVC, etc.), which range from 8 to 50 ohms.
As a result, the maximum volume may be less significant on average impedance headphones, regardless of quality. In this case, the power (in milliWatts, i.e. volts x current) provided by the sound card matters when indicated; again, this is unrelated to quality.
Therefore, there is no reason to use an external sound card, but it is better to use a suitable headset, or as a precaution, to choose a low impedance model.
For microphones, which correspond to a voltage of a few millivolts, impedance is also a concern, and it's important to match the microphone's impedance to that of the PC input. Values range from about 50 ohms to 600 ohms.
Some microphones (electret, condenser) include a preamp, which generates a higher output level. In the case of electret microphones, which belong to the entry-level category, this does not imply better quality compared to other types of microphones (dynamic).
Best regards.
Yes, thank you, but I think I've seen that to connect an external microphone, it needs to be plugged into an external sound card because the one on the motherboard doesn't provide enough power as I believe it requires 4.5V.
I just did a quick search and it seems to me that this kind of card is made to connect musical instruments to a PC.
If it's for a microphone, it really serves no purpose
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If it's for a microphone, it really serves no purpose
--
This is a public community. To protect your privacy, do not post any personal information, such as your email address, your phone number, your credit card ....
Good evening,
I’m not an electrician, but in a Jack, it’s mainly sound that comes out, like from the wires connecting an amp to speakers.
So it’s not volts that pass through it but Ohms.
It’s a current for sure, but not one that you get stuck to.
I might be mistaken, but it’s worth seeing if there are other opinions on the subject.
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This is a public community. To protect your privacy, do not post any personal information, such as your email address, phone number, or credit card details....
I’m not an electrician, but in a Jack, it’s mainly sound that comes out, like from the wires connecting an amp to speakers.
So it’s not volts that pass through it but Ohms.
It’s a current for sure, but not one that you get stuck to.
I might be mistaken, but it’s worth seeing if there are other opinions on the subject.
--
This is a public community. To protect your privacy, do not post any personal information, such as your email address, phone number, or credit card details....
Only professional sound cards or mini-mixers for balanced wired microphones provide 48 V to condenser microphones.
Also avoid monoblock adapters (guaranteed breakage). Check if cables or adapters are available in music stores or at Cultura.
In any case, I do not see where you saw the mention of 4.5 V to power a mic, which is already powered by phantom power.
Otherwise, connect to a mixing table or an amplifier and take the sound from a headphone output.