Abstract: This work is to investigate relationship between subjective quality and objective distortion quantities for loudspeakers, for the aim of predicting perceived quality with physical parameters. The measured distortion parameters included: duration of initial transient, duration of final transient, harmonic distortion and frequency response. Subjective evaluation test was conducted to give the perceived sound quality described with six adjective words. Based on the correlation analysis between the distortion parameters and the sound quality psychological scales, it found that softness is mainly correlated with the duration of initial transient and the harmonic distortion. The clarity is correlated with the harmonic distortion; the fullness is influenced by the duration of initial transient.