how do I secure sub in the boot

[chris100889]

Hey,
I recently hooked up my 12" sony (crap i know but free) sub and a bridged 2 channel amp. The sub is in the boot in a large ported enclosure with the amp mounted on top, the problem is, i don't know how I'm meant to secure the box down without damaging the fuel tank underneath? I really need to do something cause that heavy fu**er in the back sliding around doesn't seem safe lol. So how has every1 else secured their sub? Cheers guys.

[Bax]

Have you considered a heap of velcro? Not ideal I know but it's a temporary solution.

Apart from that you could always put some brackets on the box and then strap it to the side of the boot.

That's if you don't want to drill.

[Zuicider]

haha i use to use stolen milk crates and bits of wood to jam it in.

[WNTDVT]

Heavy duty velcro is fine, i have 2 large strips (probably 80cm x 10cm) holding a box with 2 type R's in it which doesn't exactly make for the lightest box and i have never had a problem with movement...ever. When i smashed my old car it almost rolled...when i checked the boot the box hadn't moved at all!!!
Also, lots of car audio places use it as it's simple, cheap and effective.

[chris100889]

thanks, i never thought velcro would hold it but if it holds 2, itll hold mine. where would i get decent velcro? im assuming velcro dots from big w wont cut it lol. cheers for the replys

[StoneX]

Most hardware stores sell velcro by the meter off a roll.

[Ra1d]

isnt it illegal to not have them secured to the floor? my sub and box arent secured but weighs about 40kgs....never moved once

[Hot-Rod]

Same, i have 2 x sony in box, weighs a s..t load, never moves, never strapped or anything to boot.

[azkwazere]

Defectable item, must be secured!

Properly?

Take sub out of box, drill hole in bottom, drill hole in boot floor, bolt box to floor using bolt and washers then put sub back in. It aint going anywhere!

Velco is a cheaper option! Not as effective.

aZk.

[DavidPartay]

In my old sedan I used bungee cords to strap it against the driver's side back corner. I used some foam to keep it the distance away so the sub could actually move.

In my wagon, I have some MDF lining the entire boot floor (for sliding drums in and out easily) and have a cut-out for the sub, with the amp bolted on brackets quite neatly behind the sub I was very proud of myself when I did it .

[50LTRv8]

Defectable item, must be secured!

Properly?

Take sub out of box, drill hole in bottom, drill hole in boot floor, bolt box to floor using bolt and washers then put sub back in. It aint going anywhere!

Velco is a cheaper option! Not as effective.

aZk.

Does that mean I have to secure anything I have in the boot(esky, tools ect). This seams rather stupid to me. How is the sub gunna come through the seat into the cabin in an accident? Velcro may be cheaper but it still is not going to hold the sub in a crash.

50LTRv8

[azkwazere]

Dont ask me, i didnt make the rules up!

All i know is you can be done for having unsecured heavy loads. So yes, it would include eskys etc.

Dont ask me how its a hazard in the boot but appharently it is and i was just pointing out the issue.

...youd be surprised what velcro can hold up. The idea is, if you try and slide velco together(then apart) you physically cant, however if you pull the strips apart by tearing them away then you can quite easily.

Depends on how much and the size of the velcro... im confident it can hold alot of weight in a forward moving motion.

aZk.

[WNTDVT]

Does that mean I have to secure anything I have in the boot(esky, tools ect). This seams rather stupid to me. How is the sub gunna come through the seat into the cabin in an accident? Velcro may be cheaper but it still is not going to hold the sub in a crash.
50LTRv8

Please refer to my first post, if you saw the photos of my car that were on here after the accident you would have a different view on that . The velcro that is used is called 'rock strap', it's an industrial grade/strength.

[Cobez]

If you dropped your fuel tank, i suppose you could bolt it down to the boot floor using L shaped brackets from Bunnings and some decent thickness bolts. Making sure of course nothing is sticking out underneath preventing the fuel tank from being bolted back up correctly.

But yeah, you would have to wait until there is **** all fuel in your tank, then drop the tank.

[Chirpstr]

I just jacked up car looked underneath and thought ahh she'll be right. lol
I drilled it up towards the the back seats with some metal screws not overly long and it doesn't hit the fuel tank at all, docent even come close. Even back like right in the middle of the tank you could get away with drilling screws in there. You could even use slightly longer ones if you line up where the grooves go up and down on the tank. (If you know what I mean)
But yeah if you can be bothered taking the tank out that would be safer.
Good Luck Mate.

[stockies]

Why don't you bolt it to the metal bit under the boot striker. (metal between the tail lights and behind the carpet.) Thats where mine is bolted to.

[TWOJZ]

isnt it illegal to not have them secured to the floor? my sub and box arent secured but weighs about 40kgs....never moved once

umm, heavier items tend to move more, its called inertia, you just dont drive hard enough.

[Cobez]

Nah, he just isn't a ****head.

[StoneX]

I stupidly had a 70kg+ (two 31kg subs + box) box not secured and it still moved around.

Velcro works but it does flush up your carpet in the boot and makes it very hard to get the box out if you need to. My velcro tore layers of MDF off the bottom of the box rather than coming unstuck from the carpet.

A false floor is a better way to secure a sub box but is also a lot more work.

[chris100889]

false floor is heaps of effort lol. My first though was L brackets but I'm too worried about the fuel tank to do any drilling. That **** about getting defected is f***ing stupid...as if every time you put anything heavy in the car you have time to/can bolt it down, some rules are so messed up.
I went with velcro in the end and it works fine, its probably not the most safe option but in a crash I have worse things to worry about than the slim chance of my back seats falling down and my sub going on a killing spree.

[Ra1d]

umm, heavier items tend to move more, its called inertia, you just dont drive hard enough.

i think its more owing to the fact that my car has good quality suspension that doesnt make it roll like a 10ft dingy in a tidal wave. u deserve to end up wearing your sub box as a hat u 'hard driving' maddog

[UNKNOWN]

Ive got L shaped brackets from the sub box to the floor diff hump in the boot. Just be careful on the drivers side, the fuel lines are there!!!

[Hot-Rod]

Defectable item, must be secured!

Properly?

Take sub out of box, drill hole in bottom, drill hole in boot floor, bolt box to floor using bolt and washers then put sub back in. It aint going anywhere!

Velco is a cheaper option! Not as effective.

aZk.

defectable, drilling holes in metal structure of car. Doh!

[VH commodore]

i have seen a few crash test videos where tool box's and other heavy items in the boot managed to knock the back seats down (breaking the latches) and going through the windscreen! id assume a sub could do the same thing in extreme circumstances. depends what kinda car u got tho, vb-vl commodores have metal behind the rear seats so nothing going to come through that. its just cars where the seats can fold down...but i wouldn't be concerned about it, these where speeds in excess of 100km/h.

[Ra1d]

lucky no-one on here does over 100km/h hey