As the DC power supply rails in the amp fall after switch off they make the amplifier unstable and it starts to oscillate making this noise until the votages fall to Zero.
The Amp maker should have arranged to switch a relay in the speaker circuit immediately mains power is removed
Turning the steering wheel farthest left or right for a few seconds will cause a loud squealing.
Yes, over time they will not sound as great if you play them loud all the time. They can get worn out just like computer, TV and stereo speakers.
If the motherboard has a mic jack,if not you need a sound card with one. It will only be as loud as the software allows, it is not an amplifier. But you can run it to an amp or your stereo and then to speakers.
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Using your electronic devices to play through a separate stereo system can be fun and exciting. Small electronic audio devices usually have small internal speakers and don't play very loudly. Using an adapter to hook them up with a separate stereo system can give you the power of your music through loud stereo speakers that really makes them sound wonderful. The power of small audio devices comes in being able to control your music, but the music performance is almost always poor. That's why it's imperative to get loud external stereo speakers that are connected vis-a-vis an adapter to the small audio device.
Basic computer speakers are not very loud,they are not best for movies or music.
If you turn the sound up too high on your stereo system, you can damage the surround sound speakers. Your speakers have a maximum amount of power they can handle from the amplifiers, and if you turn the volume up too high, you are giving the speakers too much power.
Having either stereo speakers or headphones should be the goal. The two separate audio devices should work together depending on the situation you have and what you want to do with the sound performance. You can either sit at home and listen on your stereo headphones and enjoy and lay back in your bed, or you can have a party and play your music loud from your stereo speakers. Having separate external playback devices to go with your audio devices should be an essential to owning any kind of small audio device. You just can't get everything out of a small audio device.
could be the throw out bearing
Ever wondered why sometimes your stereo speakers start to hum when you plug certain components in? The most likely cause of humming in audio equipment is due to a ground loop in your home or apartment mains power wiring. A ground loop occurs through differences in resistance in the electrical system. When you connect your computer to your stereo, a path is provided for electricity to flow from one wall socket to another as the electrical system tries to balance itself. This causes your speakers to hum.
If there is no music but a loud scratching sound coming out of all the speakers then it is the amplifier. just pull it out to get the model number and buy a used one on ebay.
S220 is the product code for a set of Logitech speakers that are used for achieving loud stereo sound from a laptop or desktop computer. They are a relatively cheap way of pimping your laptop.