Rockford Fosgate help

Hey guys,

alright... now don't laugh at me... I'm a total newbie so I have no idea what I'm talking about and I'm gonna ask silly questions.
A few years back my cousin had to get rid of his car and he gave me two Rockford Fosgate speakers that were going to be used in it.
Well, I'm about to get a truck and I want to really trick it out, and I'm planning on putting these to good use.
The problem is, I don't even know what they are...  being that they are 15" I would assume that they are subs but like I said...
I'm a total newbie.

The only thing I can see on the as far as a model number goes is S1 and directly under that 154 like this:
S1
154

I looked on their website but obviously they are a bit old so I couldn't find them there, I also searched eBay with no luck.
If you could help me figure out what I got and the specs on them I would really appreciate it.

Also, is there any way to get dents out of the cone? Over time I guess the middle got pushed inward on them and I'd like to pop that out.
Thanks in advance.

You have a Series-1 15 inch subwoofer. It is single voice coil, 4 ohm, 150 Watt RMS. As far as the cone in the middle, it has no effect on the performance of the sub. So you don't have to fix it. I am not sure how to go about doing that if you still feel the need. Here is the link I found:

https://www.rockfordfosgate.com/rftech/library/1992/5_Subwoofers/S1-154_158-TS.pdf

Thanks a ton! I think now I realize why I couldn't find it on the website, I didn't have a - in the name on the search.
Thanks a ton for the info!!

btw I stuck some electrical tape on there and let it sit for a minute, gave it alil pop and I got the dent out of one of them, the other has a dent in the ridge where it bend opposite directions so I'll have to have a couple more goes at that one.

Thanks again, you really went the extra mile for me.