A HiFi system is a set of components designed to make music as good as possible. HiFi aims at clear soundless sound, not just high volume and enhanced bass. Music on a HiFi system will sound radically better than music on the headphones that came with the phone due to many factors such as less signal pressure (and thus less noise), higher frequency response and headphone clarity, and a much better sound experience with headphones with headphones.
People who enjoy high-quality audio are called "audio files" and the audio file is complicated and may seem difficult to get into.
Digital Audio Converters (DAC)
DAC is essentially a very high level, and it's possible to break down what each part of a HiFi setting does and how it contributes to the overall sound. -connected headphone jack. It is the starting point for all the sound in your system. Due to the electric noise in your computer, the sound from the built-in headphone jack sounds very noisy. You may not notice this sound on most headphones (since most headphones are noisy anyway), but on HiFi headphones it becomes apparent.
The solution is to isolate the electrical interference with an external DAC. These are built with much higher quality components than the built-in DAC device in your computer. They are often capable of pushing higher impedance headphones and delivering phantom power to microphones that need it.
For most speakers and some headphones, you need an amplifier. Up your audio before listening to it, as it may be quiet to get straight from DAC. If you have lower impedance headphones, a USB DAC should drive them well, but anything that requires 250 Ohm and higher means you probably want an amplifier so the noise from DAC does not destroy things.
The reason amps are necessary, as most DACs are not made to amplify sounds over a certain point. If you were to set DAC up to 10, it would sound incredibly noisy (the bad type of noise). However, you can turn it to 5, and then set the amplifier to turn it up 200%, and the sound would still be ready.
Headphones and speakers
All parts above get the digital Listen from your device over a thread. At the other end of the wire you have the option of using headphones or speakers.
Good speakers are complicated to install, usually you need a large stereo receiver where you can connect everything. Good sound depends on the correct placement of the speakers and room acoustics. This can be mitigated slightly with appropriate positioning and noise repellent panels.
Headphones are easier, usually only requires a single cable to connect. These headphones will have an impedance measured in Ohms. This is headphone electrical resistance, and higher impedance headphones will require more power to run properly. Most headphones will be very low, usually below 32 ohms, while some headphones can go up to 600 ohms. Generally, higher impedance will get better sound, but only if the rest of your setting matches in quality. If your DAC and amplifier can not handle the audio so high, then you may not see any benefits – things may even be worse than before.
The most important thing to check when looking for headphones is the frequency response and overall clarity. Some headphones, such as Beats, will swing the bass on their headphones to give the illusion of better sound. For an educated ear this may sound really good, but a HiFi setting should preferably have a relatively flat frequency response, without modifying the incoming sound. Overall clarity is difficult to measure, but affects the sound quite a bit.
Depending on the usage, you may not need a microphone, but people who want to record audio can easily add them to their settings. Most high end microphones will use XLR connectors, as most DAC devices support. Some microcontroller microphones require 48-volt phantom power, which means that it needs an external power source to work. However, there will be power from the XLR cable itself, so you do not need to plug in any extra, just turn a power switch on your DAC. Make sure you do not deliver phantom power to a microphone that does not support it, as you can damage the microphone.
You will of course need cables to connect all of this together, but not just any cables will cut it. Because most of these components take power from the wall, you need shielded cables. Normal auxiliary wires that you can use to play music in the car are not shielded and will collect tons of static from nearby electrical signals. Shielded cables come to a speaker, but are necessary, because if any component in this loop is low quality, it destroys the sound. You do not need handsome, advanced gold plated contacts or anything, but shielding is a must.
So, how does this fit? Well, when you play a file in iTunes, your computer sends it over USB to DAC. DAC decodes it and then sends the analogue audio to the amplifier (usually over a 1/4 "cable but sometimes over a normal headphone cable.)
So, what do I buy?
You do not need it after it has has been amped, sent the signal to your headphones or speakers where you can finally listen to it.
The end result is incredibly clear sound. Buying crazy expensive components to have a good experience. The reverse is also true, you can buy overpriced components and end up with noisy, distorted sounds. It's about quality and comes down to every part.
The exact components of your setting will differ depending on your needs, your budget and your personal preferences. The market is very varied and As such, we can not easily compile a comprehensive guide to purchasing every single item you need. We encourage you to do your own research and read reviews from more qualified ones dproffs before deciding what to buy.
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