sound deadening

I recently bought new speakers and subs for my car and my audio guy was of course trying to push as much sound deadening as possible to maximize the experience. While I agree that I should definitely get some, is there much value in deadening the bulk of the car, especially if i still want to...

I'm planning a subwoofer upgrade in my car. From what I have seen I have 3 options, and I'm wondering which is the best for me. I know a box in the trunk would be ideal, but I don't want to have to sacrifice trunk storage + I really don't want the bass so strong it rattles my teeth or anything...

In preparation for my audio upgrade, I'll be beginning by installing Noico sound deadening in the trunk. I'm pretty sure I can understand how to remove the panels by removing the pins, but how do I remove the plastic latch cover that I've circled in the pic? Do I just pull it harder?

In my 17 Civic I'm wondering about sound deadening the doors when I do my speaker installs. What I'm mainly concerned about is the factory vapor pad thing in the door. Should I replace that after I do the deadening material behind it or replace it with something else?

Are there any quides/photos/videos on removing the seats and carpeting to install sound deadening on the floor? Thanks

I have to say, the sound insulation of my car while cruising is excellent. But I'm not satisfied with the engine noise in the cabin on acceleration. It is so drony. Can anyone suggest how to get rid of this. If sound deadening material is the only option...Please suggest a repair shop. Or is...