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					Originally Posted by juiced99ws6      
This is the Kicker Hideaway behind my seat. I am 5'7 and have no issues with it there which is why its behind mine, if I were taller I could simply have put it behind the passenger seat. That Pioneer option also looks nice and will save a 1/2 and inch but I really like the quality of the kicker and will vouch for it on sound quality and ease of installation.
 
*note* disregard condition of my seats. my purchase of a zeintop pushed that project right on down the road. Its also snowing so that's why all the white lines in the pic.
 
I will post the link to the subwoofer as well. 
KICKER | Hideaway Powered Subwoofer | 
	
 
I just installed this sub in mine.  Not bad for the size. Definitely fills the lack of bass in the car. I also bypassed my factory amp with an aftermarket to make my Alpine dash and Pioneer door speakers work better.  I am pretty satisfied with the overall sound now. My ears are happy again during my drives.  I had the Subaru under seat sub in my last Subaru's I owned and it is more of a mid range speaker than a sub.  Very little bass output. I would recommend the kicker unit if you can get it cheaper than 300 online or ebay.  I bit the bullet when I was at Best buy so I paid full MSRP which is rare for me  but money well spent if you like higher quality sound systems.  I have replaced every sound system in every car I have owned since I was 16.