Higher freq = trebs = comes from tweeters.

Yeah its in the ek1. I had to chop up my door trim a fair bit. Around the same amount as tbm did.

I listen to rnb/hiphop/electro/trance.

I haven't heard the tempo's myself but I've heard they're pretty good. Personally I'd go 2ch for the front speakers and get a mono later on for a sub. But if you're planning to get a sub now. Might as well get a 4ch and have the fronts off 2ch and bridge the others for the sub.

Don't have much experience with amps as I've only ever used jaycar ones. The jaycar ones are more than enough imo.

Get the 4ch response "fully digital" (not really a digital, its a class D amp, jaycar just mistook it for digital) from jaycar.

100rms is enough for the maximos