An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal.
It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In this sense, an amplifier modulates the output of the power supply to make the output signal stronger than the input signal. An amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss.
An amplifier can either be a separate piece of equipment or an electrical circuit within another device. The ability to amplify is fundamental to modern electronics, and amplifiers are widely used in almost all electronic equipment. The types of amplifiers can be categorized in different ways. One is by the frequency of the electronic signal being amplified; audio amplifiers amplify signals in the audio (sound) range of less than 20kHz, RF amplifiers amplify frequencies in the radio frequency range between 20kHz and 300GHz. Another is which quantity, voltage or current is being amplified; amplifiers can be divided into voltage amplifiers, current amplifiers, transconductance amplifiers, and transresistance amplifiers. A further distinction is whether the output is a linear or nonlinear representation of the input. Amplifiers can also be categorized by their physical placement in the signal chain.
Originally released by Music For Nations on June 6, 2004, it was re-released by the German-based label SPV in May 2005 after the collapse of the former. The Music For Nations release came in two formats: jewel case with 10 tracks, and digipack with 13 tracks. Unlike normal special editions, the 13-track version's bonus tracks are in the middle of the album, apparently forming the "true" album as the band intended it. The SPV release contains a bonus EP with four additional tracks (all previously released) and videos of two songs from the original.
The critical reception of the album was generally positive, with comments such as:
"A British rock-scene altering record. Enjoy it in all its infinite glory"Kerrang!
"No other record this year will have the audacity to field such lofty ambitions, let alone have the skills to fulfil them"NME