Usually the central items or appliances that are for instance found working home entertainment systems are placed within protective and attractive installations. These include the audio visual cabinet, usually a full on item that provides not only the space to put, say, a TV on or in but also to help make things like cabling more efficient. The design and construction of the thing features many qualities.
These are all tasked to help entertainment appliance users have more comfort and convenience within easy reach and use. All the dimensions of the cabinet will be for easy access, not too high and not too low. However, the entire cabinet itself also needs higher shelves or lower parts for peripheral usage, like storage for DVDs and spaces for speaker set ups.
This type of installation is part of a class of cabinetry for displaying things or having these constantly within reach for basic or essential use. There may be some doors in specific places, but most of the compartments and spaces are going to be open for easy access. The open spaces to are specially designed for the views or displays.
This means that you have your television or monitor for instance on a certain height and in a compartment without obstructions. There is probably only a very low piece of wood or material rising above the compartment level to stop the appliance from rolling or falling off. For audio items, there will also be need for open compartments but not for viewing.
Speakers for instance have to have to face into space within the entertainment center so that they provide sound properly. Also, the speaker controls, the stereo or the iPod or audio equipment need to have wide openings for easy navigation or manipulation. The total effect for the entire complement of the audiovisual system therefore should have all these convenient features.
Cabinetry is versatile and there can be lots of attachments related to this versatility. You look at the audiovisual kind with not only the means to keep all your appliances in one accessible place but also for other uses. Thus it is typically large, perhaps occupying and entire wall in your living room, a wall that may have been created precisely to fit it in place.
Other compartments that are not directly used for keeping entertainment appliances and systems in may have photos or knick knacks on display. You have an open ticket on what you could have or what you prefer for these. They are usually placed on the peripheries, surrounding and maybe complementing your entertainment system.
This is a highly technical thing too. There is always need for the furniture item to be actually more attuned to tech needs. Things like insulation, and pass throughs for cabling and even sockets or jacks can be attached.
There will also be lots of designs available, and the furnishing is usually made of wood. But there are other materials that can work. It all depends on what you prefer, whether traditional looking cabinets or ones that are more space age.