Professional loudspeaker systems, consisting of sub-woofers (base-woofers) combined with satellites or high and mid-driver line arrays; professional loudspeakers with built-in amplifiers, consisting of sub-woofers (base-woofers) combined with satellites or high and mid-driver line arrays; professional loudspeaker units, consisting of sub-woofers (base-woofers) combined with satellites or high and mid-driver line arrays