Stereo integrated stereo amplifiers, also called integrated stereo, are essential devices for those who love music or use it for work and professional purposes, as they combine the functions of preamplifier, power amplifier and amplifier. With these devices you can obtain incredible audio quality: which obviously depends on the type of amplifier you are going to buy based on its future use. You must therefore choose the amplifier from those with the greatest number of programs and functions. You can find excellent 5.1 stereo Yamaha amplifiers and other brands, such as Pro-ject and Rotel on audioquality.it.