Carpeted box or painted finish, what do you all prefer for a trunk build?

I've built four or five boxes over the years and I keep coming back to carpet for anything that lives in a daily driver. Painted MDF looks sharp for about a month, then the trunk gets scuffed loading groceries and every rock chip shows. My last carpeted box has been knocked around by kids, coolers, and a dog for going on six years and still looks fine. The trick is wrapping before you assemble the box, so the carpet pulls tight around the corners instead of bubbling up at the seams. Cut it a little generous and use spray adhesive plus staples underneath where nobody sees. That said, carpet is not the lazy option if you do it well, it's just forgiving. I did one birch ply box with a few coats of poly on it because it was going in a show truck, and it was satisfying, but I baby it. For your build I'd stay with what you've got and maybe just carpet the amp rack to match so the whole corner reads as one piece. On the amp question, seprate panel every time. I bolted an amp straight to an enclosure once, and when I had to pull the box to fix a leaky terminal I ended up unwiring the whole thing in a freezing driveway. Now I make a false floor or side panel that screws into the trunk itself, run the wires with a quick disconnect, and the sub box slides out on its own when I need the spare tire.

I went the other direction on my hatch build last spring and have zero regrets. Painted it with a couple cans of truck bed liner and threw a thin piece of trunk mat under it so it sits on somethig soft. The bed liner stuff is way more forgiving than regular paint, it's got a texture that hides small scuffs the way carpet does, but I can wipe it down when something spills. Cost me about half a can for the whole enclosure including the baffle edge.

The bigger question for me was your amp one, and I'd push you hard toward a separate rack panel. On my last box I bolted the amp right to the side and regretted it within a month. Every time I wanted to pull the box out to check a leak or reposition it, I was wrestling with power and speaker wire that felt too short, and the terminals took a beating. This time the amp sits on its own little board screwed to the trunk floor and the sub box just slides in beside it. Two screws and the whole thing comes out if I ever need the cargo room for a furniture run.

For a daily driver I'd also say leave yourself access to the port side, slots need a little clearance to breathe and I've seen people shove boxes tight against a seat and choke them.

The part that took my carpeted boxes from homemade looking to clean was a heat gun. I learned it wrapping a slot port on a hatch build years back, warmed the carpet lightly before pulling it into the recess and around the port flare, and it stretched into the corners instead of bunching. Just keep the gun moving, that carpet scorches fast. Before I figured that out I had fuzzy ripples at every inside corner no matter how much adhesive I used. On the amp rack, one thing I'd add is running the speaker and power wires through grommets in the panel if you ever plan to unbolt it, makes pulling the box out a two minute job instead of a rewiring session.

One thing I'd add on the carpet, my spray adhesive only held up a couple summers before the top of the box started peeling where the sun bakes the trunk. Pulled it back, hit those faces with contact cement instead, and it hasn't lifted since. Still used the cheap spray on the sides and bottom where nothing sits in direct heat. Also put a terminal cup in the baffle on my last build so the wiring stays with the box when it comes out. Beats fishing wires through a port every time I need the space.

This thread is making me feel better about mine. I built a little box for a 10 inch sub last fall and my cut where the sub sits in was rough, edges chipped and all, so I covered it up with the same fuzzy carpet and now you can't tell. Reading about the recessed look makes me want to try a cleaner cut on the next one. How do you guys get that hole cut so neat? Mine looked like I chewed it out with a dull blade, and I'm guessing it's something about going slow or backing the board with scrap wood?

For the fella asking about the sub cut, the old router trick never fails. Make a circle template out of scrap, rough the hole with the jigsaw a hair inside the line, then run the router with the bearing riding the template. Takes ten extra minutes and comes out glass smooth. Back in the day some of us just clamped two sticks down as a compass guide and went slow, same result if your hands are steady.

On the amp rack, put a strip of gasket tape under the feet before you bolt it down. Trunks hum like crazy and that one thin strip kills 90 percent of it.