Our friends at secrets have done it again: In reviewing the Paradigm Reference Seismic 12 Subwoofer, Secrets wrote a glowing review before they took measurements. After taking measurements comparing FR and THD between the SVS ultra and the Paradigm they look to cover their buts by saying basically that distortion isn't necessarily bad and that it's all a matter of personal preference. This is a nice follow up to their glowing review of 800 dollar power cables. Its funny how they can be so rigorous with their DVD reviews and be even worse then the audio porn print mags about everything else. Here is the link: http://www.hometheaterhifi.com/volum...er-8-2004.html Here is the portion of the review: Addendum: Here are some additional data taken after this review was published, in response to comments on various forums. One SVS CS-Ultra was compared to one Seismic. Phase settings were the same (00 on the Seismic, while the amp for the SVS does not have a phase setting). The subs were measured in the same position in the room. SVS CS-Ultra Seismic Max SPL at Combination of 20 Hz, 31.5 Hz, and 50 Hz 108 dB 120 dB THD at 20 Hz and 100 dB 18.3% 100% THD at 25 Hz and 100 dB 28.3% 52.3% THD at 31.5 Hz and 100 dB 9.9% 11.9% THD at 40 Hz and 100 dB 7.2% 8% THD at 50 Hz and 100 dB 4.2% 3.9% THD at 80 Hz and 100 dB 2.1% 1.4% Obviously, the SVS has much lower distortion than the Seismic in the 20 Hz to 30 Hz range, but is about the same in the 30 Hz to 50 Hz range. The higher distortion produced with low frequency fundamentals in the Seismic will result in more audibility, since 50 Hz and 75 Hz (the second and third ordered harmonics of 25 Hz) are much more audible than 25 Hz. With bass, THD is not necessarily undesirable, since it results in more audible impact. With input signals in the 20 Hz to 30 Hz range, the SVS will be felt more, while the Seismic will be heard more. It is all a matter of preference.