Why do speakers make that hissing sound?
In: 10
Dirty power somewhere in the system. Either its not being filtered out properly at the amplifier or at the driver stage.
Could also be a ground loop, but that would be dependant on the speaker.
Even the best-shielded cables are antennas. Random EM waves (radio, microwaves, cell phones, TV signals, satellite signals…) literally induce teensy tiny amounts of current in the cable, and the speakers just turn what current comes through the cable into sound anyway.
It’s the same as TV snow or radio static only much less because the cable is shielded and you’re not tuning to and amplifying a specific frequency
Due to the way they function, every stage in an electronic amplifier leaks small transient electrical signals which excite the speaker’s coil and move its cone, producing an audible hiss. If the hiss increases when you turn up the volume, then most of the leakage is in the pre-amplifier (the stage that amplifies input signal to a level that the final stage can work with. If the hiss remains steady when you increase the volume, then most of the leakage is in the final stage.
While no amplifier is leakage-free, leakage generally decreases as amplifier quality (and price) increases. High quality amplifiers are designed to suppress hiss to sub-audible levels at normal listening volumes.
[removed]
did u watch kevin durant highlights when the speaker was hissing?
A hissing sound is random fluctuations of the speaker, and it consists of all audio frequencies sounding at once. It happens because there is an amplifier which is actually sending that totally random/hissing noise to the speaker. So your question is really more about why the amplifier is doing that.
The speaker is driven by a fluctuating electrical current—to make the cone move forward, the amplifier must increase the voltage in the wire; to move the cone backward, the amplifier must decrease the voltage. As this is a large physical device, it requires a much stronger electrical flow than the weak signals provided by most sound-generating gadgets. The amplifier takes that weak input and adds more power so that it has the right amount of electrical current to move the speaker.
Unfortunately, generating a sufficiently powerful, yet perfectly pure analog electrical signal is difficult. There’s really no way, with the kinds of physical materials we have to work with, to make an audio amplifier that can amplify an input signal enough to drive a speaker, without also producing a little bit of hissing noise in the background.
Some of the hiss may also be on the input side, e.g. coming from the device that’s generating the audio, e.g. a microphone, CD player, phone, etc.
There is also interference that’s commonly transferred through the electricity. Another person referred to this as “dirty power”. There are common causes to this and many cases can be solved by adding a circuit filter in the line. In one part of my house, I’ve got 10 speakers, 3 preamps, 2 mixers, and 6 amps. My system would get a hum on some of the electrical paths to the speakers. Carefully tracing the hum to a piece of equipment and installing a filter (a ground loop isolator) as well as adding power strips that offered electricity supply geared to audio equipment solved my system(s) issues.
##Mods, please forgive me if posting links to products are not allowed.
Affordable Ground Loop Isolator that I used.
Furman Power Conditioner that I used.
Tricklestar surge protector with outlet power sensing to turn on power to multiple outlets when power to one comes in + a built in circuit breaker.
The Tricklestars are awesome. I bought one in 2010 and just bought 3 more. They also have motion sensing power strips. A built in resettable circuit breaker is really great to protect against surges.
https://www.amazon.com/stores/TrickleStar/page/67CDB14C-3F19-44A7-93F8-FD0782F8F78F?ref_=ast_bln
It’s noise from electricity. Either turn the power down, buy better speakers, or try a magnet across the cable to realign the electrons.
Latest Answers