so i've got this little 1-15 hartke combo. i've never really like the sound that the combo produces, and yesterday (frown) i noticed the speaker is taking the short road to destruction. NOW i'm thinking about salvaging the little devil. anyone know about these carvin 10" subs? or maybe something similar. i'm betting that i can replace the mounting plate and put 2 10" subs where one 15" has been (i'd rather a 2-10 combo then a 1-15 if i had my choice). what do you all think about this idea? ever tried it or thought about it? know of any better speakers in the price range? oh, this amp produces 140watts, but i can't remember at how many ohms.