I upgraded the shitty factory system with 4 kickers and a 12 in bazooka base cannon powered by a 2000w pioneer amp. The biggest thing I noticed while the sound really good. I also installed the dynamat in it as well. What i did notice was the acceleration. Now when I do soft or hard acceleration it sounds like I have this fake like turbo sound. Like when someone hits the turbo yet i don't have turbo. Just seems a bit under powered now ..
Now i did hear that the Crosstrek is underpowered a bit anyway from what i have read and seen. But i am wondering if this sound system is pulling a bit too much power or if there is something i can do. The noise isn't that bothersome. Almost kinda cool like I have a turbo which i don't.
What i did notice was that I've only had the system in about 2 months now and about 2 weeks ago i blew a fews the connection where the power cable connects to the batter for the amp had gone bad. I was told it was a defected fuse assembly so that was easy fixed. But when this happen of course the turbo sound went away. Yet I think during the time I was without amp and sound system i did notice what seem to be a bit more power accelerating .. So I am not sure if its related or what.
Oh left factory head unit just speaker upgrade and amp. I kinda didn't mind the nav factory that was in there.