I've moved a discussion that started here
to this thread, where it is more appropriate.
Tom Nousaine has tested the DD1812 to produce 104 dB at two meters (our listening position) at 20hz. So we're off by about 16 dB. Room gain in a typical listening environment is about 6 dB at 20hz. So now we need 10 dB. Each time we double the number of subwoofers, output increases by 6 dB. Since decibels are logorithmic in scale, tripling the amount of subwoofers will increase output by ~10 dB. This is why you need about 3 DD1812s to match the output capability of the T8s and S8s.
Originally Posted by bluray_1080p
This guy quotes from some pathetic web site who sells subwoofers and expects people to buy it? Hahaha.
Actually, if you bothered to read it, the information was merely posted by the manufacturer. The measurements on Epik's website are the result of Tom Nousaine of Sound and Vision magazine who's spent a good deal of his career providing measurements of various subwoofers (different from reviewing). Do a web search, you might learn something.
It isn't on the list because it isn't for sale yet. I would be surprised if Craig doesn't test it when it becomes available.
Plug away buddy plug away, I don't see any of those "epik" subwoofers making the list anytime soon.
For your information, I have no affiliation or interest in Epik subwoofers. The only reason they were brought into the argument was because they provide a single link to Tom's measurements. I haven't bought anything BM or ID in a long time and have turned to DIY, in order to provide the performance I want, in my price range. For those interested in Epik products, I'd direct you to this thread. If you want to challenge their performance, Blueray, post there, please. I won't respond to any more of your posts in this thread (as you can see, Craig clearly intends on purchasing one to add to his list). For anyone familiar with the DIY world, the name Chad Kuypers says it all.
Look like a lot of people do not trust the tests that Tom Nousaine did.
Mind providing a link? I think what you are referring to was someone comparing the results of an Ilkka test to a Tom test. Comparing results from two different people in two different places is never a good idea - it was this idea that was challenged, not Tom's tests. No one in that thread challenged the results of Tom's tests.
Right in the epik subwoofer thread, since tom did not mention how he tested the subs.
Are you blind?http://www.epiksubwoofers.com/C2.pdf
Originally Posted by Tom Nousaine
The subwoofer frequency response and bass limits were measured with it set to maximum bandwidth and placed in the optimal corner of a 7,500-cubic-foot room [...] Frequency response was taken ground plane at 0.5 meters which accommodates true acoustical summation of individual radiating elements [...] Bass limits are limited to 10%, the range where drivers are still working in a linear fashion but where further drive causes exponential increases in distortion or when protective devices cut output or non signal related noises (such as port noise) are audible. SPL is measured at 2 meters in an optimal, mode balanced location.
Again, quote where his measurements are challenged...