I have '98 4dr. I currently have 2x 12" pioneers in a standard box with a pioneer 800w amp. The subs are pretty dead but the amp still works ok. The biggest thing I want is to get my storage space in the back of my blazer back so I was thinking about building a box around the passengers side wheel well but I'm not quite sure how to do this. Also I don't need any huge bass anymore so I'm definitely dropping back to 1 sub but I'm not sure what size to go with. Maybe a 10"? Lastly where can I put my amp? I was thinking under the back seat but I don't think there is enough room. Any help would be appreciated as I have never done anything like this before. Thanks

 

Put the amp under the back seat and you wont be able to fold it down. I put mine under the front pass seat. I had to remove the slide adjuster handle and spring and part of the rear foot warmer. All is well.