Have you looked at hsu research? For $2118 the price of one svs pb13 you can get the hsu vtf-15h dual driver set up thats total shipped to your door. Dont think you could get two svs pb13's even used for that price. I personally own two of these subs and couldnt be happier with them. They also have a sealed sub too but they run around 1100 a piece before shipping. Check them out it. I pit a link above to there website.