hello, i have a sony xplode amp, 1 workng mtx 10" (blew the other one out) , and 2 sony 10" subs. right now i am just running the 1 mtx sub, i am planning on adding my brother's old sony subs, but i wanted to know if anything bad would happen if i did that. -thanks

 

nothing would happen with the impendence is the same, but its just odd stick to the same subs or just upgrade to betters

 

i have no $

 

As long as its wired correctly, it would work fine and will not damage anything.

The sound will be less than optimal because any 2 different subs will have different sonic characteristics. If you're not an audiophile, then you probably don't care about (or notice) the accuracy of the system. Its a bit of work to properly match 2 different subs and have them sound correct.