Salam,
How many of you love big bass? Have subwoofer that you've been tuning and yet not much sound file that have that deep low bass for you to test.
Here I give you files that I've been using to check out my bass. But for all rounder, I just use Paul van Dyke - Castles in the sky. You can search that one yourself.
Have around ten files here. A mix of some that I found few years back. I just use this as my standard because I already know the sound.
Make your tuning much more easier than using normal mainstream songs.
Enjoy!! :)
-LB-