Boomer deluxe 600

hi i have a boomer deluxe 600 1x4 its got one sd1446 [COLOR=blue !important][COLOR=blue !important]driving[/COLOR][/COLOR] 4 sd1446's and the [COLOR=blue !important][COLOR=blue !important]driver[/COLOR][/COLOR] transistor is the only one that test good. and was wondering can i just replace them with 4 2sc2290's and leave the sd1446 thats good in for the driver? the 1446's are 70watts and the 2290's are 80watts not much of a difference. would i have to change [COLOR=blue !important][COLOR=blue !important]capacitors[/COLOR][/COLOR] and input resistors? i was hoping i could just put 2290's in place without any changes if possible? or should i just replace with 1446's thank for any info.