Klipsch HD 500 Compact 5.1 Home Theater System (Set of Six, Black) (Discontinued by Manufacturer) Exclusive horn-loaded Micro-Tractrix design produces more lifelike sound and greater output with less power & energy than conventional designs. Four beautiful High Gloss Black speakers feature 2.5" heavy-duty IMG woofer and .75 Aluminum Micro-Tractrix horn-loaded tweeter. High Gloss Black center channel for precise dialog & special effects via twin 2.5" IMG woofers & .75" Alumninum Micro-Tractrix horn-loaded tweeter Powerful and compact subwoofer in Black Pica finish with crossover, phase and level controls Integrated Wall brackets included rotate 40 degrees, also 1/4" threaded insert for use with optional floor stands from a variety of manufacturers.