500 series - entry level sub- around $70
1000 series - a bit better than 500, the 8" is , SQL - $100-?
2500 series - comparable to most mainstream subs, SQL - around $200-?
3500 series- better than most mainstream subs, SQL - $370-?
9100 series- hardcore sq sub, SQ - $650-?
9500 series-...