Apologies in advance if this has already been discussed, I ran a search and couldn't find anything. I have a Premium with the non-RF stock stereo which in my opinion, and the opinion of a local audio shop, is rather decent for what it is. However, i would like to add a small underseat subwoofer to enhance the lows...would like to avoid taking up space in the cargo area, and no desire for a 15" sub. So, it looks like our seats are not the greatest for adding something under the seat, however there is one spot/option that might work...i have the 2nd row bench seat, and there seems to be plenty of room under the seat that is right behind the front passenger seat for one of those 8" underseat subs, i think the height should be okay under the seat as most underseat subs are less than 3". any thoughts? has anyone done this? i noticed that the floor under the seat has a piece of foam that lifts up and there are a few wires underneath...not sure what those are for, but if the sub uses velcro (rather than screwing it in) on the bottom then it can be easily removed to access those wires if needed. My main concern is really about what i've read/heard regarding Starlink and Eyesight which have some features that are connected to the headunit. Is there anything that needs to be done with the headunit to retain those features when connecting an underseat sub to the stock system? I still have my older '12 Forester which has an underseat sub under the passenger seat and has worked fine...but it doesn't have Eyesight or anything so i didn't have to worry about that, and it's a smaller vehicle than the Ascent so i'm not sure if i would get the same performance. or is it best to not monkey around with the stereo and leave as is, i definitely don't want to risk losing any safety features. any advice is greatly appreciated, thanks!