Let me start by saying don't try to do it all by yourself. If you want to give it a shot, at least hire a rigger for an hour to come out and inspect your work to be sure it's not going to fall down. Better yet, hire the rigger to do it and ask him to show you how it's done.
Assuming you're going to try and do it anyway, here's a rough outline of how I would go about doing it, but understand that every situation is different and I sometimes change approaches in the middle of the job if I get the feeling what I'm doing isn't going to work. You're probably safe if you've done temporary rigging before and this is just your first time doing a permanent install, but if it's your first time EVER hanging something that could kill people above their heads at least hire a rigger to take you through the process.
from the eye bolts on the top of the speaker attach a 1/4" shackle. to the top of the shackle you can either use aircraft cable or Grade 30 chain (for christ's sakes don't use jack chain
at the top of the chain attach another shackle
thread the shackle pin through a batten clamp
attach the batten clamp to the bar
that will get you dead hung, now you need your pull up
from the pull up point on the back of the cabinet, attach another shackle
run chain to a pull up point on the ceiling or rear wall
if going into wood thread a 1/4" wood screw through a unistrut flat plate with a lock washer and pull back to the desired angle, when you have the desired angle drive the screw through one of the links of the chain to hold it tight
if pulling up to owsj or a beam use unistrut beam clamps instead.
this is pretty rough, and based on the ceiling points being able to handle the weight, but again if you're not absolutely positive everything is going to hold then hire someone.
Oh, and carry $1-3 million worth of liability insurance, and only install once you have incorporated a company and contracted the job through that company.
Better yet, just hire a company to do it.