Speaker Systems

Type of Speaker System

Speaker systems are usually the choice to be made when planning a second system. Important points to consider are size and purpose of the room in which the speaker system is to be used, and the interior design. Let's start by looking at some of speaker system is to be used, and the interior design. Let's start by looking at some of the type of type of speaker systems most commonly used in commercial facilities, and how they are installed.

Speaker Systems Used In Commercial Installations


Surface Mount Speaker Systems

The type usually speaker in box-type enclosure that are mounted a wall are ceiling. Surface mounting is the most basic speaker installation method. Surface mounted speakers are sometimes used for primary output in small to medium size facilities, or as secondary support speaker in large halls or event spaces where the main speakers alone aren't able to provide sufficient intelligibility throughout the entire listening area. They are also sometimes used to distribute announcements and and BGM throughout the facility.

Ceiling Speakers


Ceiling speakers are built into the ceiling so that they are flush with the ceiling surface. This type of installation is ideal in situations where the speakers are to be hidden so that they won't disrupt the interior , and is a common choice for distributing BGM throughout a facility. The broad coverage and relative lack of directionality of ceiling speakers is an advantage for the latter application. Ceiling speakers are sometimes used in a supplemental support role in larger installations, in the same way that surface mount speakers .

                                                  Column Speakers

Column speakers consist of numerous speaker units of the same type arranged vertically in a column-like enclosure. With the speaker units arranged in this way vertical sound spread toward the floor and ceiling is reduced, and that can help suppress unwanted reflections. This arrangement also results in less diffusion of the sound energy, and therefore less loss of output level. Column speakers are often used in churches, gymnasiums, and other facilities where excessive reverberation might be a problem, as well as in conference rooms and lecture halls where maximum speech intelligibility is the main goal.

Type of Printer

Printer

An external hardware device responsible for taking computer data and generating a hard copy of that data. Printers are one of the most used peripherals on computers and are commonly used to print text, images, and photos.

Types of printers:

• Dot matrix printers 

• Inkjet printer

• Laser printer

• All-in-one (AIO) printer

• Thermal printer

• LED printer

Non-impact Printer

Inkjet printer

The most popular printer for home computer users that prints by spraying streams of quick-drying ink on paper. The ink is stored in disposable ink cartridges, often a separate cartridge is used for each of the major colors. 

Although inkjet printers themselves are often relatively inexpensive, the ink cartridges used in the printers can increase the overall cost of the printer.

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Laser printer

A laser printer is a printer that utilizes laser technology to print images on the paper. Laser printers are often used in corporate, school, and other environments that require print jobs to be completed quickly and in large quantities.

This picture is of the Lexmark C782n laser printer and as can be seen much larger than an ink jet printer found in most homes.

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Thermal printer

A thermal impact printer is a printer that uses heated pins to "burn" images onto heat-sensitive paper. These printers are commonly used in calculators and fax machines; and although they are inexpensive and print relatively fast, they produce low resolution print jobs.

A thermal printer, thermal transfer printer, or thermal wax-transfer printer is a high quality printer invented by Jack Kilby that commonly utilizes a thermal wax ribbon that melts a colored wax onto the paper creating near photo-realistic images.

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LED printer

LED printers were developed by Casio and are printers capable of printing at the same or close to the same quality as most laser printers. LED printers work much like laser printers, but utilize a LED panel that recreates the image on a negatively charged drum. The areas where the light hits the drum become less charged, which attracts toner.

LED printers

The printer then transfers the toner from the drum to the paper and applies intense heat to fuse the toner to the paper.

Impact Printers

Dot matrix printers 

Dot matrix printers were first introduced by Centronics in 1970 and is a printer that uses print heads to shoot ink or strike an ink ribbon to place hundreds to thousands of little dots to form text or images.

DOT matrix refers to the process of placing dots to form an image; the quality of the image being determined by the dots per inch.

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Multifunction printer (MFP)

Multifunction printer (MFP) is used to describe a hardware device such as an all-in-one printer that is a printer, fax, and scanner and everything you'd need in one device. 

 Samsung all-in-one printer 

 An example of a Samsung all-in-one printer that is a laser printer, sheet fed scanner, and flatbed scanner.