Sony revealed a special surround sound system for the PlayStation 3 at E3 last month, and SCEJ has now officially dated the system. The surround sound system will be released on September 3oth 2010 and will have a price tag of ¥19,800 (around $199 / £150).
No word yet as to the date and pricing for other regions, but will update you as soon as we hear anything. Seeing as the system was revealed at E3, the device is likely to hit North America in the near future.