Amplifier will be separate. (But this enclosure can only be purchased WITH amplifier and sub as a complete package). In most vehicles it can be mounted in the same panel on the opposite side of the trunk on an included mount. For select vehicles equipped with nav AND cd changer, you'll have to give up your CD changer for an iPod integration kit or similar if you want the amp hidden or you can mount it on the outside of the panel. Amp is very small, though, so trunk space is not impacted in any measurable way if external mounting is required.
It doesn't have a bass knob, but bass is very well blended and needs little adjustment from one recording or source to another.
Fs = 35Hz -- and the woofer plays accurately well below that. Here's a link to the specifications of the woofer we're using so you can see a frequency response curve:
http://www.alumapro.com/docs/alusonic_ex_8.pdf
Note that the prototype we built used an off the shelf woofer. Final version will likely have a subwoofer optimized specifically for this enclosure (although I'm not sure how it could sound any damn better!
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