I agree on the Shallow Subs .... seems like a good amount of subs out there are like 5-6" or so and I can use those im small truck box .... so I have veered away from the shallow subs now.
Just trying to find a regular sub now with a somewhat shallow depth to it (like 5" at best) and it still be a normal subs so it can move and give that extension and hit those low end that I have to have (I hated my pre-loaded Rockford Fosgate Punch P3 sub I bought as it sounded horrible and the low end was pure junk and just distorted on the low end all the time ... I returned it all).
I still think the Power Bass is a good option and I can get it from
Amazon and return it if I don;t care for it. (the other I'm kinda stuck with and I don't like that).
The sundown has about 6.5" mounting depth and that's cutting it real close ... it will sit right on the back of the box and I doubt that is good for the back of the sub and magnet area sitting SO close to the flat wood like that.
Would like to keep it in the 100 buck range and get it from a retailer that I can return if the product does not perform the way I want.