Polk Audio PA880

[caraudioguy2100]

This amp is using A1358 and C3421 as the drivers for the outputs .

I replaced them with A1220A-Y and C2690

Are these good replacements for the originals ?

 

[Perry Babin]

Those should be good subs. I would have either used those or the MJE15030/31 (TO-220 case) which have always been good class B/AB driver subs.