I've got all the wires run and speakers installed and now I'm to the point where I'm about to secure my sub enclosure inside the trunk. I plan on using one or two L brackets to secure the bottom and another L bracket to secure the enclosure to the underside of the rear deck. I'm a little hesitant to drive screws through the trunk floor without knowing what's on the other side. It's a single 8" sub in a shallow box and fits on the ledge just behind the rear seat, so this is where I plan on drilling. I have no clue what is under that hump just behind the seat. There's a square metal plate with an electrical connector towards the passenger's side so I obviously wouldn't drill there, but I'm thinking the driver's side would be okay. Anyone know for sure? I'll be using the shortest screws possible to get the job done. Or I could even glue a piece of 1/2" MDF to that ledge then drive the screw into the wood instead. Although I'm thinking the trunk lining may not lay flat after doing so. I'll have to do a dry fit to see.

 

Another option would be to use velcro strips to secure the bottom (sandwiched underneath the box) and use one L bracket to secure the top.

 

Think I'm going to glue a piece of 1/2" MDF to the ledge then screw the enclosure to it. I'll cut the trunk liner if need be and either paint the wood dark gray of cover it in gray carpet.

 

Put a metal plate under the liner and put some bolts through the plate then liner. Then attach some L brackets to your speaker box. Slide the L brackets through the bolts then secure it with a couple of nuts.

 

If you're worried about noise, put some sound deaden material on the metal plate under the liner

 

Was about to say, what about noise from the plate rattling? That's a good idea though. I'll definitely consider it.

 

Think I'm going to use MDF and span most of the width of the trunk, but rather than glue it to the trunk floor, I'll secure it to the trunk liner with a couple screws then screw the enclosure brackets into the MDF through the top of the liner. I'll put some Dynaliner down to provide a buffer between the MDF and the sheet metal.

 

That title is click-bait.

 

I know. Kind of intentional

 

as long as you use protection, it's safe to screw anywhere

 

 

Looks like installing a piece of MDF to the underside of the trunk liner is going to work out nicely. Upon further inspection, I found that the bottom liner has several raised areas that are about 3/4" tall. I removed this section of liner and will be attaching a 3/4" piece of MDF to it, then screwing my L-bracket(s) into the MDF (as others have suggested). I plan on cutting slits in the liner for the brackets to protrude through for a cleaner look (not that you're going to see it, but whatever). Below are a couple photos of the liner before and after the modification. I will be installing the MDF sometime later this week. All I had to do is remove the sound deadening material (white material), then used an Exacto knife to severe the attachment points, then finally cut the section of liner with a pair of tin snips (regular scissors are not heavy duty enough). I plan on putting a piece of Dynaliner between the MDF and underside of the liner to prevent any noises. I already put a piece on the trunk floor.

 

The MDF secured to the liner with sound deadening foam on both sides worked out great. The sub box is nice and secure and best of all not rattles!