The other day I was driving around in my car thinking, "Wow, my stereo sounds really good today, I wonder what it is." Later that day I opened up my trunk and noticed that my 6x9's had come unplugged. Now these aren't the best 6x9's on the market (diamond m3) but they are respectable. I just got done tearing them out and I really enjoy it much more now. I've got the extra bass from the sub filtering in through the rear deck and it just seems fuller up front. I know some people really love rear fill so I guess it's up to you, I'm just not ever going to put anything back there again.