4
| 4 Questions | Alternative Rock | Асеновград | 2008 |
| 40 Days Later | Metalcore | София | 2009 |
| 4o4o | Classic Rock | София | 2010 |
| 4x4 | Blues Rock/Funk Rock | София | 2008 |
| 4 Questions | Alternative Rock | Асеновград | 2008 |
| 40 Days Later | Metalcore | София | 2009 |
| 4o4o | Classic Rock | София | 2010 |
| 4x4 | Blues Rock/Funk Rock | София | 2008 |