Front 3CH speakers under the monitor of a desktop PC.（Subwoofer with built-in surround amplifier ONKYO HTX-11X Used for 2,500 yen、２CH KENWOOD LS－SG7、It was used and it was 10,000 yen as a pair.CENTER Infinity Delta Cnter 6ohms It was used for 2,000 yen. If you want it, please go to Yahoo! Auction!）＆ Dual 32.5 inch monitor.