Not sure what you mean by "more compact, accessible, and easily removable". I put a 10 inch Bazooka tube with the built in amplifier under the side facing couch. It fits just fine and is very accessible, although I've not found a need to access it. Even though the amp is only 100 watts it will chase you out of this small space (3051S) if I crank up the volume.
2018 Forester 3051S (aka Clyde)
2015 Wrangler Toad (aka Bonnie)
At some point during every day you suddenly realize nothing else productive is going to happen the rest of that day. For me, it usually occurs around 9 am.