Sound System EP is a progressive house single on vinyl by Threshold Productions, released on Dance n Dust Records (DNDEP01) in 2005.
The EP features 3 tracks. 1 track is exclusive to this release: "High way 420". Several of its tracks are well known favorites: "" (2004, 3 releases) and "" (2005, 3 releases).
- 01Threshold Productions — Sound system
- 02Threshold Productions — High way 420
- 03Threshold Productions — Red square