I have found on youtube.com a perfect compilation for subwoofer testing.
There are six guys saying that this is six different songs:
Beat Dominator – Bass…. Can U Hear Me?
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Beat Dominator – Feel the Bass
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Bass Mekanik – can you hear me
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DJ magic mike – feel the bass 3
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Beat Dominator – Beat the bass, Can you hear me?
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Dj Magic Mike – bigbass woofer test.
that sound is good