Concert amplifiers
prices on 21 model
— it is customary to refer to this variety all amplifiers designed for installation in a special rack. As a result of this (as well as the features of the functionality and rather rough appearance) they are not designed for use in a home environment, but they are great for various special tasks — concerts (including large-scale ones), live music in cafes and restaurants, public broadcasting of notifications at railway stations and airports, etc. Note that a concert purpose does not mean high power, although in general such amplifiers are more powerful than home ones.