The tweeters are a combination of simplicity and quality. In addition to the minimalist modern design, the speakers will impress you with their great features. They have a tri-band system, a frequency range of 40 Hz - 20 kHz, an impedance of 8 ohms and a sensitivity of 88 dB. High quality construction provides a basket for the mid-bass (4 ") and polypropylene bass (8") speakers. Their versatile use is an advantage.