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Message: <blockquote data-quote="Ed Lester" data-source="post: 4756492" data-attributes="member: 587479">Just as a note, the listings of top 3 were very close in some of these categories.For example,The SPL readings in ported boxes were 4 tenths difference from #1 to #3.I started off building a universal test box that I can adjust the volume and adjust port tuning. So I played with each sub and adjusted the box to find the optimal setup  for each sub.I used a Term Lab setup to test SPL, and used the Audio Control RTA to test frequency response.I wanted to find the smoothest response from 20hz to 60hz. I did this in the same fashion that IASCA judges their cars but I only focused on bass.I also backed up this testing by using the Termlab and played each frequency from 20-60hz individually and took my readings for each frequency.Accuracy was measured by ear using various double bass tracks from Dream Theater and a few Buddy Rich albums.And I also used the Tem Lab to view the sine wave movements.Durability tests were easy. I started out playing a test tone with a measured 1000w. I used a 50hz tone for 10 minutes and all subs handled it. A few got hot and started smoking, but were not damaged.Then I took power to 2000w and did the same test. A few subs blew a coil within 2 minutes.The subs that did not blow hear went on to receive 3000w with music.The top 3 were very close in this and actually tied. The DD was a super close 4th. There were only a few seconds difference in failure.I wish I would of tested actual temperature of the voice coils to see what sub stayed the most cool, but I did not think of it at that time.</blockquote>

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