Just come back from the States as I had 2 weeks holiday in Orlando my rental car was a HHR, must say a good car really enjoyed driving it.

Anyway I know it's probably been asked before but i've searched all through the forum but can't find the definitive answer. I gather that the speakers are 6.5 inch in the front and rear doors? I can honestly say that I thought the standard stereo was pretty good in this car, much better than the standard spec in some cars back in the UK, plenty of bass and from the standard speakers.
I wanted to ask what you guys are replacing your speakers with to offer the same sort of punch from the speakers but obviously with more quality??

Cheers

 

All speakers are 6.5" in doors... If you have the Premium system, then you have an 8" sub in the rear cargo area as well.

Ah.. I need to start reading the entire post lol.. I haven't replaced mine yet, but others will chime in soon enough.

 

I put some Infinity's speakers in my doors and 2-12 inch Rockford Fosgate's in the rear!

 

Rockford power series in the front door, rockford punch series in the rear doors, and three rockford p2 subs in the rear.

 

Alpine Type-R in doors and two 12 inch Alpine Type-S subs.

 

Put all Boston in mine, 10" for the bass with a punch amp

Here are photos of what I put in mine, before I put them in

https://www.chevyhhr.net/forums/audio-video-17/what-do-you-guys-think-5308/

 

I'm happy with the way my factory stereo sounds other than it's not really loud. I actually would like to hear what it sounds like with different speakers.

 

RF punches in the doors kicker l5's in the back and a kicker amps