| Year | Quartet |
|---|---|
| 2016 | Cutting Edge |
| 2015 | Without a Doubt! |
| 2013 | Rushed to Perfection |
| 2012 | The Ultimate Package |
| 2010 | Instant Classic |
| 2009 | Instant Classic |
| 2008 | The Goods |
| 2007 | The Goods |
| 2006 | Comin' Clean |
| 2004 | The Golden Nights |
| 2002 | Direct Effect |
| 2001 | Quorum |
| 1999 | The Twilight Knights |
