Favorite song to demo or test drive speakers?

Billy Vera -- At This Moment (Live)

Yaz - "Situation" from the Upstairs at Eric’s album.
Norah Jones - "Lonestar" (female voice demo) and Painter Song from her Come Away with Me LP.
EP version of Steve Winwood's Higher Love.

David Lindley: "Mercury Blues". In fact, the entire El Rayo-X album.

Average White Band: "Schoolboy Crush"
Bruce Cockburn: "Peggy's Kitchen Wall"
Rickie Lee Jones: "Showbiz Kids"
Allison Krause: "New Favorite"

Thumbs up for all three of these recommendations!! Great songs. 
Mganga: The Wailin' Jennys - "One Voice"

Papafrgog: The Ubiquitous Mr. Lovegrove by Dead Can Dance

Dmbwire: Band of Horses - Detlef Schrempf