This must be why I find the SubMersive subwoofer to be the finest subwoofer on the planet. The distortion is SO low. I always find specs tell you very little about how something really sounds, but <1% distortion from 25 Hz up...does any other subwoofer do that? <0.5% distortion from 50Hz up! The SubM rules!!! The SubMersive is the quickest, most detailed, sneakiest (as in blend into the room and disappear sonically) subwoofer on earth.
Thank you, and great to hear you are still loving your SubMersive.
Below is what I just posted to the AVS thread regarding the distortion measurements:
I would caution against too much comparison of John Johnson's test data vs those done by others like the more rigorous testing at Data-Bass, especially with regards to output capability. I will double check with him, but I believe the measurements were all taken in the middle of his room or off the midpoint of a wall. Much more useful comparisons can be had by looking at his past history of reviews. You will see the SubMersive is similarly low in distortion with more headroom beyond his 100dB spot-check or exceeds many well known subwoofers he has tested.
A quick scan of the subwoofer reviews under the "AUDIO" section found these past reviews for some comparison. The first 2 show how well the SubMersive has strengths over even the servo-feedback designs like the $9k Paradigm Sub2, and Velodyne DD-18+, while also showing much lower distortion, more output and deeper extension than well reviewed subs like the JL F113 and Ken Kreisel DXD-12012. Do take note a few older reviews measured at 1 foot rather than 2m or the 18" distance he used for the frequency response he saw in his room.
[B]Direct links to Secrets' subwoofer reviews by John Johnson - "On the bench"[/U]
Paradigm Sub 2
JL Audio F113
KEN KREISEL DXD-12012
JL Audio F212
Earthquake MiniMe P10
Earthquake Supernova MKV15
Poking through the above, here's a fun quote from the earlier review of the Paradigm Sub2:
At 15 Hz and 100 dB output, with the microphone 2 meters away, distortion was less than 2%. That is a landmark result. But it gets better. At all measurements up to 50 Hz, 100 dB output, and the microphone 2 meters away, distortion never rose above 2% except at 25 Hz, where it was still only at 2.3%. I am speechless about these results, except for the word "Astonishing".
Having some fun with some admitted cherry-picking...
15Hz 100dB - Sub2 vs SubMersive:
20Hz 100dB - Sub2 vs SubMersive:
25Hz 100dB - Sub2 vs SubMersive:
And then in the very important upper octave... 50Hz 100dB - Sub2 vs SubMersive: