Comparative evaluation of the acoustic tube amplifier sound quality by means of listening tests

The study presents comparative analysis of basic electrical parameters and sound quality of six acoustic amplifiers: five acoustic vacuum tube amplifier and a transistor amplifier. For the measurement of basic electrical parameters, specialized computer stands and a computer psychoacoustic model have been used. Additionally, listening test has been carried out in accordance with the methods presented in the paper. Test results of subjective tests are consistent with the results of the model tests. The use of modified subjective sound quality evaluation is characterised by simplicity and low costs.