I would much rather have too much power than not enough it handles it just fine, adjust the gain properly and then control it with the bass knob, always sounds clean and much better than when I had the jx250 on itCan that tw3 Sub handle that much power? I'm still working on deciding on all of my stuff and trying to decide what amp I am going to go with. I plan to go with the tw3 and probably the Focal 165AS up front and possibly something a little cheaper in the back. I was looking at going with the JL 700 5 channel, but at 4 ohms it looks like it would only push 180w to the sub. Whereas if I jump up to JL 1000 5 channel it will push 400 watts to the sub at 4 ohms. They will both push 75 watts to the other 4 channels at 4 ohms.
Also did you sound deaden the doors? I'm assuming those 80 mm on the AS3 go into the dash???
In your scenario 180 is not going to cut it with that sub, that will be underwhelming
Most trouble starts with not enough power rather than too much as long as you pay attention.
I would go with two amps, one for the sub and one for the rest. I have never really been a fan of running a multi channel amp that includes the sub.
The 3-way focal are tits for the price but they had to take apart the dash a bit to install them from underneath as they are too big for standard install. This was out of my league do I had it all professionally installed, they did a great job, can't even tell anything was done and nothing permanent for changes
I did not sound deaden anything