6x9's were a popular way to upgrade a system to get more bass into the cabin........... and it still works very well. That being said, you get what you pay for as well. A real bargin may start off sounding just ok........ but may take a dump after you've been playing them for a while and sound like total garbage. Buy a decent set.......... and dont' be afraid to waunder off the beaten path and avoid the big box stores.
Current : 2013 Mini Countryman JCW
Past: '88 E30 M3, '69 BMW 2002 Ti, 2000 328i, Audi A6 TT, BMW X5 3.0i , Audi A4, Mini Cooper Clubman S 1.8T