I am looking to upgrade my audio system in my 06 HHR and was curious if anyone knew what the various specs are for the factory system.
Does anyone know what the factory systems RMS power is?
Initial plan is to replace the HU with a Sony that has 45 watts RMS per channel to start with but I am concerned the factory speakers may not handle it.
Does anyone know what the factory speakers can handle?
They will be replaced later with a full set of Polk DB speakers but I want to make sure they live a little while until then.

Second I want to add a sub in the factory location but this car did not come with it. I can buy a new factory sub in the box/bracket and new amp from various sources online but I mainly am looking for just the box since I want to use an aftermarket sub and amp.
I have found 2 different part numbers for the speaker and box assembly with conflicting information.
Some places say the part number is 15930451, others say 15906941.
I can find no information about what the difference is between the two part numbers. I don't know if it is something to do with the box or the sub itself.
Does anyone have any insight on that?
The main thing I need is the box, as I've stated, but I need to know more info about the box to determine what sub would be suited for the box. I'm sure it would need to be a 'shallow mount' sub but does anyone know what the actual maximum mounting depth is in the box? Does anyone know how much space is in the box? Is it a sealed box or is it ported? How durable is it? will it handle a sub with a 200 watt RMS amp without being damaged, such as cracking or blowing apart at a seam?

Lastly, does anyone know what the part number is for the panel that covers the sub? I don't want to modify mine in the event I ever sell the car I can put everything back to factory.

Thanks for any information you can give me.

 

Our resident HHR parting out guy probably has those pieces, send him a PM with you list.

https://www.chevyhhr.net/forums/www....ad.php?t=63306

I also think a good look at Crutchfield website will give you ideas and proven combinations of equipment.

 

Crutchfield is where I generally get my car audio equipment from, however they don't really have much in the way of info relating to the factory sub. They mainly offer big universal boxes to put in the cargo are and I am trying to keep all of my cargo area as I will be using this vehicle for vacations and road trips where I may need the cargo space.
They do show that my planned HU and door speakers will fit, but that's about it besides offering the necessary brackets and wiring harness adapters.

 

There was a member trying to sell the factory amped radio system. I would make the assumption that the factory installed speakers can't handle more than 10 watts, probably far less. I paid a lot of money, years ago, for a home amp and speakers that only put out 25 watts total that could be heard down the block.

15930451 is discontinued So I'm guessing the part number is superseded.

The aforementioned parts guy probably has everything including the wire harness..