Favorite song to demo or test drive speakers?


What is the first song you played when you listened to your new system for the 1st time? 
mhewitt
Steely Dan : Aja
Grover Washington jr. : Winelight
Sarah Mcloughlin : Angel
Manhattan Transfer : Mystery
Matte kudasai/ king crimson
eyes without a face/ billy idol
hotel womb/ the church 

that’s just a few. 
Clark Terry: Portraits SACD   Carrie Newcomer: The Slender Thread SACD on Stockfisch   Katherine Bryan: Flute concertos on Linn Records
Pierre Moerlen's Gong - Time is the key, for high frequencies. Tommy Bolin - Private eyes, for low frequencies.
Supertramp - Brothers in arms, for overall sound.
All vinyl.