What do you think about my planned audio set up?

[hockeyrcks9901]

Head unit: Alpine CDE-125BT
Amp: Not sure here. Thinking a four channel and if I add a sub, I can just get a one channel amp for that. Or I can get a five channel if the price isn't much more.
Fronts: Polk DB6501
Rears: Polk DB651
No sub for now. If I get one in the future, it would be something small. 10" in a small box. I use my truck a lot so I'm not sure if I'll ever get around to it.

Recommendations are encouraged of course. I haven't kept up with audio components at all. I've just seen some good reviews of this stuff.

 

[cted]

get some subs

 

[hockeyrcks9901]

get some subs

Thanks for the help!

Any reason for the suggestion? Like I said, I use my trunk a lot! I travel about 200 miles between two cities around 2 times a month for a weekend and with this small car, space is a premium.

 

[Dboy]

i have a kicker cvr in mine dewd just one twelve inch an since the cars tiny its bumpin i would def think about gettin a sub bro