I still have pretty good luck using the first few minutes of Pink Floyd's Echoes (off the Meddle album) for testing bass response. It's not loud bass but goes fairly low, with runs of notes on the low string of an electric bass, octave jumps, and very clean sound.

Most speakers will tell you that something is going on down there, but I find relatively few speakers let you clearly make out how the notes are going up and down in pitch.

EDIT - just re-read the thread and realized that it was for testing subs not speakers. Never mind...

Last edited by bridgman; 08/06/20 09:05 PM.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8