"Hi-Fi" is the abbreviation of the words "High-Fidelity", meaning the audio equipment should reflect the original sound signal “as is” with as little change as possible. Theoretically, the original signal should not be deteriorated or modified in any way. The Hi-Fi concept is similar to photography, in that it requires a true reflection of the object onto film. Listening to some CD players, Phono Cartridges, Audio Amplifiers, and Loudspeakers, even those reaching very high standards in Hi-Fi quality, can result in a less than pleasant experience due to various distortions and colorations. For example, in an ideal World, an amplifier would be a straight wire with gain. However, due to various circuit designs and variable component quality, the ideal amplifier concept is not always an easy goal to achieve. Loudspeakers, being mainly electromechanical devices, also tend to exhibit variable results to the listener when comparing them to the original source of the sound and performance. It is only through the dedicated Research and Development of all of the products used in sound reproduction, that the theoretical goal of reaching sonic perfection to the original sound can be realized.

Vacuum tube amplifiers have always been the amplifier of choice for the working musician and their superb sound quality has always been recognized. Musical myth has ascribed almost magical tone to them. While the results may not be entirely magic, tubes do have a sound that is different from solid state amplifiers, and one that happens to make amplified music sound better to the human ears and brain.

In the early 80s, the invention of digital recordings in the form of CDs, MDs, etc. has gradually led to the fading out of such form of traditional recording as turntable records and analogue audio tapes. Yet some audiophiles reckon that the sound so reproduced by these digital recordings is rather rigid and artificial. With the use of tube amplifier, many agree that the reproduced music sounds much smoother and natural, particularly in terms of ambience, hall depth effects, instrument separation, human voice and harmonics.

The real reason to use tube amps is therefore simply that they sound better.