A resonator for stringed musical instruments with a resonance chamber, is suitable for both bowed and plucked stringed instruments with a resonance chamber which aims at increasing the volume as well as the sound projection and timbre quality of the instrument, thus improving its performance, by eliminating the residual air which remains inside the sound box. For that purpose, the resonator comprises a tube with a beveled inlet end and an exit end with an end-button, one or more holes at various angles to reduce the air intake pressure, together with one or more compressor tubes included inside which interfere with the balance variation of air pressure and speed towards the exit across a reed.