Distribution amplifiers (DAs) split the video signal from one source into two or more signals. A common application for a high resolution video DA is to take the signal from one computer-video port and then amplify and split it so it can feed two or more high resolution data displays maintaining the original quality. DAs also provide amplification and enhancement features for signals such as peaking and leveling. Each of the outputs on Extron's DAs is buffered so the original signal will still retain its clarity and strength when split


To select the right DA for a specific environment, begin by identifying the following elements:

Distribution amplifiers are used in applications that require multiple projectors or monitors to display the same source's image at the same time. For example, with a distribution amplifier, the single video output on most computers can be converted to two, four, or more outputs.


Here's an example of how a DA can be used. In the diagram, a computer with a digital video output is being input to a distribution amplifier (D/2 DA4 DVI). The DA is splitting the signal and distributing it through four, independently buffered outputs: a computer monitor, a digital monitor, and two digital projectors.


When more outputs are needed than are available on a single DA, multiple DAs can be looped together. That means the output of one DA can be fed into the input of another to form a daisy chain.

Extron offers different models of DAs designed to work with various types of signals. When selecting a DA for a specific application, first answer the questions from Step 1. Then identify the product category that best fits your needs:

Line Drivers

Enabling long distance connections between one source and one destination, line drivers are used to preserve video quality when driving video signals over long cable runs. Video signals normally lose amplitude and high frequencies on long coax cable runs. Line drivers provide variable gain control which can be adjusted to boost the video signal, compensating for the overall drop in signal voltage.

Audio / Video

A/V DAs distribute composite video, S-video (S-VHS & Hi 8), and/or stereo audio. Some Extron DAs are a combination of more than one DA in a single enclosure. For example, the Extron CVDA 6 MX QUAD contains four one input, six output composite video DAs. Only one internal power supply is used to power all four DAs. With all four DAs built into one rack-mountable enclosure, the dual and quad DAs also offer space savings, heat reduction, and competitive pricing-all at the same time.

VGA, Mac, 13W3, RGB

These DAs are designed to work with different computer signals and analog signals, such as RGBHV, RGBS, and RGsB. RGB DAs have four or five BNC connectors per input or output and can be used with composite video, S-video, and component video. RGB DAs can accept VGA-UXGA, Mac, Sun, or SGI video using adapters.

DVI (Direct Digital)

DVI DAs distribute transition minimized differential signaling (TMDS) DVI signals.