Amplifier

Wondered what an amplifier is ?
In popular use, the term usually refers to an electronic amplifier, often as in audio applications to operate a loudspeaker that is being used in a PA system to make the human voice louder or play recorded music. Amplifiers may be classified by the input (source) they are designed to amplify (such as a guitar amplifier to perform with an electric guitar), or named for the device they are intended to drive (such as a headphone amplifier), or by the frequency range of the signals (Audio, IF, RF and VHF amplifiers for example), or grouped by whether they invert the signal (inverting amplifiers and non-inverting amplifiers), or by the types of device used in the amplification (valve or tube amplifiers, FET amplifiers, etc.).
How many models are available ?
There are 2 variants in amplifier. They are as follows
a) 2 channel amplifier – 400 watts output peak – 2*60w RMS
b) 4 channel amplifier – 800 watts output peak – 4*60w RSM
What is the cost of these models?
Amplifier - Xcite Series
69 XCT-2CH-240 A 2 Channel 2990/-
70 XCT-4CH-480 A 4 Channel 4990/-