lets see....i would find out what kicker subs they are....is that 1500 max or rms? whats the deck? and you dont need a cap, if its 1500rms you may need a new alt....
but next, if this is temporary, why waste money on it instead of just saving more money for you future system?
well we do need more info, the amp could be a 1500watt zapco amp and the kickers could be cvx's and yes that would be nice or they could be L5's and a 1500 watt rockwood amp and it is garbage. We need more info. An ok deck to you might be a pyle cd player while a ok deck to me might be alpine F1 status. See my point?