Hey i have 2 Polk Audio GXR 124's in a sealed box with 1.25 air space for each sub. I am running the subs off of a Profile 800sx amp that gives each sub 200 watts rms. bought 1 sub for 99 bucks and got the second free, the box was 70 bucks, and the amp was 99 bucks. Not to much money if u add it all up i guess,i think it sounds very good for what i paid (not to mention Polk Audio Subs have very nice sound quality) if ya know what any of this stuff is tell me what ya think of it !!!