i have money waiting for 2 10" per door. very much not needed but fun i was playing around with the 10" proto and actually heard it quietly ( because of crossover settings) reproduce 20HZ note but they are very good from 80hz on up if i get time i will make a vid of the proto type here that was the starting point they sound similar the production is just a little better all of the way around very very good driver they keep up with a selenium ST350 very well