bad luck that fella , had mine blow on me b4 . . . . not the right time for it to happen with yas goin on PR . . . .
i have a spare kenwood amp that works if ya need one fella to get buy , as ive just got me sen a new one , so me old one is just sat in the cupboard . .
Open it up and see if there's any fuses inside, in some amps there's not only power fuses but also fuses for the speakers, if that's the case you should be able to get replacement fuses from maplin or somewhere like that... I know that's not gonna help for this afternoon but might be worth checking before you throw the amp away or take it to an expensive repair place.