These top 3 are the best in the world. I will not say how much they cost since there prices change due to dealers.
The best is Whise Profounder 616A 2800 watts rms 4 15" 125db at 15hz 2.Krell Master Reference 2600 watts RMS dual 15" 3" inch excursions 1 inch solid Aluminum chassis 120db at 20hz 3. Bag End Quartz-1 1600 RMS with 4 18" Flat response at 18hz with there outboard Crossover
By now the subs i list my not be in the order to what i list them. I list them based on woofer size and RMS
4. Wilson Audio dual 18
5. Velodyne HGS 18 1 18" 1250 watts RMS
6. Legacy Audio 1000 watts RMS dual 15" downward fireing. can hit 120db
7. My pick that i am getting Klipsch RSW 15 because the price i paid and the air movement 1000 watts RMS dual 15. The Difinitive Powerfield Supercube does 1500 RMS but is 1 10" which falls way down plus the price tells you its not a real player. Revel would be higher then klipsch RSW-15 if it had another 15" driver
8. Revel 1,000 wattt RMS 1 15"
9. Difinitive Powerfield Supercube does 1500 1 10" goes down to 15h
10 SVS top of the line sub would be last because of watts and driver size. If you got two SVS subs then i think they are at number 5!!! But its not far that two subs go head with one single sub unit. But I think they are better at very low HZ then Revel and Difinitive. If the drive size is better and the power it would go to number 4 or 5 somewhere in that spot. I paid $1200 new for my RSW-15, if i paid more i would get two top on line SVS. SVS is the best sub for the money, size, and does very good with 300 watts RMS at low Hz and has very highdb at those levels.
My list is base on specs only.. Money is not the question. Room size is not the question.
Any body that can do better then me Ask.. I would be glad to know other brands.
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Bose Suck..Period