The Grado SR225i is an over-the-head headphone that delivers an outstanding sound quality. With an impedance of 32 ohms, this Grado Headphone delivers a clear sound to enhance your audio system. The frequency response of 20 Hz - 22 kHz in this Grado Earphone plays the entire range of music with detailed clarity. The sensitivity of 98 dB/mW in the Grado SR225i will boast the sound of your favorite number. You will certainly dance to each tune as this Grado Headphone plays songs in stereo mode. There is also a pleasant richness in the midrange of this Grado Earphone that benefits all types of music. The volume control in the Grado SR225i allows you to control the loudness.