High overall impedance (8 ohms) - easy to drive with lower power amplifiers Black C-CAM (Ceramic-Coated Aluminium Magnesium) dome tweeter - derived from Monitor Audio’s award-winning Bronze series Creative use of 5.5 and 6.5 Inch drivers have delivered a choice of compact or large floorstanders and bookshelf models, as well as a centre speaker, to complement different rooms and power applications HiVe II (High Velocity, Low Noise Reflex Port) technology - for an improved transient response and tighter bass, due to smoother airflow