I have bought these speakers new in America in 1990, and have always served to full satisfaction. They are ideally suited for Rock, Blues and Funk music because of the excellent bass and striking treble. Have a very high efficiency and also work excellently behind a light amplifier. Maximum power is 325 watts. Contains: Tweeter 1 inch Softdome Midrange speaker 5.25 inch Dynamic Woofer 12 inch Dynamic with ferrite magnet Passive Radiator 12 inch. Crossover on 900 Hz and 4000 Hz. The cabinets and covers show, after almost 28 years of loyal service, light signs of wear, but the sound quality is still more than excellent.