re-amping an old sony system, first project, suggestions please

So I had found this sony sa-va system in a dumpster and used it in my garage for years. It bumps very dynamically, it has a great sound.

I live out on a large property and have a hoop house art room and noticed the system filled many acres around me with sound.

This year I started draging it around with me to music festivals in my kids wagon till the wee hours of the morning on a Harbor freight 175 inverter and a jumper battery or car battery.

i tripped across the instructables party bike designs and began thinking.

so I want to gut the electrical and t amp it and run it on sla batts.

I'm beginning this thread not at home so Ill have to post the actual pics of certain things when I get home.



2 towers
It has a 6.5 inch sub that is chambered to give it some dynamic throw to it
there's a 6in for the surround that Ive never heard
and a 5.5 with a tweeter up on top
all have very chunky double magnets on them

the above pic isn't quite my exact setup but gives an idea


Ive taken the electronics out and it looks like it is digitally amped but there are so many wires coming off the transformer I'd rather upgrade to t-ams and crossovers of my own.

I would appreciate suggestions on how to power all 6 drivers properly.well 8, but the tweeters are crossed at the parent speaker though

each is an 8ohm driver


the system is rated at 85 watts according to the back plate

I cant find any ratings on the speakers on line though