Of the Perlisten D215 THX Dominus certified subs, James Larson of Audioholics.com says: “These are all state-of-the-art products- the very best performance that money can buy for the purpose of sonic accuracy. A system where price is not an object and audio performance is not negotiable could certainly include Perlisten D215s subwoofers. The best of the best is not inexpensive, but the good news is that there are certainly subwoofers that are more expensive than the D215s that would not match its performance. If you want one of the most advanced and accurate subwoofers on the planet per decibel of output as well as per cubic foot of space, the D215s has to be my first suggestion.”