300w

I came to a conclusion that i need to install a sub in my car(Ford Cougar 1999 or in USA Mercury Cougar) as of right now i have an aftermarket head unit and speakers. The head unit is Kenwood kmm-bt205 and the speakers are 4 Hertz speakers and 2 tweeters (I don't know any details about them...

First post in this thread, I hope I do a thorough job. Alright so I'm planning to use a car subwoofer AT HOME. I was planning on using the Renegade GTR1200 subwoofer. 300 watts RMS, 4 ohm impedence, comes with enclosure. The problem I have when buying an amp, (which is what I need advice with)...