Finally finished my speaker upgrade & just installed the pioneer sub situated under passenger seat
The sound is amazing!!
I’m just wondering how I can fix the sub in place!?
I have a few ideas myself but as always is like some advise before I do it
It did come with brackets but I’m not gonna just drill into my floor!!

Maybe some board ... maybe slide it under carpet... though that would be quite hard!

The sub itself although small it’s quite heavy so it’s not moved but I like everything to be fixed & proper so any advice would be appreciated

Put a nail through each corner.

Or Velcro?

Stick couple of strips to carpet and couple of strips to bottom of speaker.

Baglady1990 said:

The sub itself although small it’s quite heavy

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Think about where it might go in a serious accident.

Stuff like this needs to bolted firmly to the car body - that's why they give you brackets with it.

Baglady1990 said:

... but I’m not gonna just drill into my floor!!

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Providing you (1) make sure your work is waterproof (2) don't drill through any pipes or cables and (3) protect your work against corrosion, I don't see the problem with that.

jrkitching said:

Think about where it might go in a serious accident.

Stuff like this needs to bolted firmly to the car body - that's why they give you brackets with it.



Providing you (1) make sure your work is waterproof (2) don't drill through any pipes or cables and (3) protect your work against corrosion, I don't see the problem with that.

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Yes I think I’m going to build a housing for it .... secure it via the brackets & then Rivet the “housing” to the shelf to the front under the seat

You are very clever [emoji3]

Might I suggest you remove the seat to help?

typecastboy said:

You are very clever [emoji3]

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I am huh [emoji848][emoji23] I amaze myself sometimes

John202020 said:

Might I suggest you remove the seat to help?

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100%!! Don’t really have a choice really ?

The seats have two massive pipes from left to right. Those could be good places to fix the speaker to.

Baglady1990 said:

Yes I think I’m going to build a housing for it

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Two things to consider: (1) A housing might interfere with the sound and (2) if it contains a built-in amplifier, be careful it isn't going to overheat.

I haven't had a look under the seat, but would it be possible to make some fittings from sheet metal that fixed between the seat and the floor, with the seat mount screws going throgh them? This would avoid drilling into the car, but would need metal cutting and drilling tools, and a source of sheet metal (say, 2mm aluminium.

I think it's getting overcomplicated, remove the seat, check under the car for pipes etc/box sections then simply drill holes and bolt or self tappers then rust proof? Next check your route to the battery for the power I assume you already know where to pick up the remote switching(turn on) signal too?

John202020 said:

I think it's getting overcomplicated, remove the seat, check under the car for pipes etc/box sections then simply drill holes and bolt or self tappers then rust proof? Next check your route to the battery for the power I assume you already know where to pick up the remote switching(turn on) signal too?

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Yeah it’s all wired in through grommet in fire wall .. remote wire ect ect I’m just confused about where would be safe to drill!! The sub is directly under passenger seat I’ve created a “shelf” for sub to be screwed into ... I was thinking for riveting the shelf lip to the front lip (the high bit the front seats are bolted to) failing that I could just drill into the floor and rivet the sub to the floor ... prob over thinking it now ... just looked under car can only see pipe ect down the centre

There will be a fuel line and a brake line somewhere under the car and if they are no where near then you can drill into the floor, don’t use rivets as pop rivets can let water pass through them. Cover everything afterwards in a good under sealer and you’ll be fine. No problem with drilling holes but as mentioned you done want to know what damage it could do in an accident.

For sound quality purposes it’s probably been designed to be attached directly to something solid, if not attached it will jump about and possibly vibrate against the underside of the seat or floor, messing up the sound.

Good advice from Andy. Another reason not to use pop rivets is I believe they are aluminium, and if they contact bare steel the two metals could cause galvanic corrosion of the steel.

Stick some velcro "hook" strips to the bottom of the sub. Press it into the carpet where you want it to fit.

Job.

Jobbed.

It won't move. Velcro only separates vertically (handy if you want to take it out quickly).

If the car has an accident of enough force to move an amplifier off two or three 30-40cm strips of velcro, the amp' "moving a bit" is not your biggest problem that day. In any case it'll only move forwards, into the footwell a few centimetres, until its wiring stops it.


Ralf S.

Ralf S. said:

It won't move. Velcro only separates vertically (handy if you want to take it out quickly).

If the car has an accident of enough force to move an amplifier off two or three 30-40cm strips of velcro, the amp' "moving a bit" is not your biggest problem that day. In any case it'll only move forwards, into the footwell a few centimetres, until its wiring stops it.

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I disagree. In a serious collision, the wiring won't stop it; it'll just rip straight out and you'll have an unsecured loose object flying around the passenger compartment. It may not happen often, but folks have been seriously injured by tablet devices being flung around in a major impact; a subwoofer is far heavier and more dangerous than that. I'd agree it's unlikely, but if it does happen, you're already having a bad day and being hit hard by something heavier than a housebrick is going to make it a whole lot worse.

I'd be interested to hear what @306maxi's take is on this - I can't imagine any car manufacturer recommending something the weight of a subwoofer being secured inside the passenger cabin with a couple of strips of velcro.

The Highway Code is quite specific on this point also. Note that items in the Highway Code marked as MUST/MUST NOT are legal requirements. Good luck arguing that attaching a sub with velcro constitutes securing it safely.

Well I fitted it! It is secured to the floor and won’t be going anywhere
Saying that as small as the sub is it’s too big to fly forward from under the passenger seat if god forbid there was a collision
In part due to in being sat inside the recess the highest end being forward under the seat
Nevertheless it’s bolted to the floor now with anti rust added!! A pain in the ass but best be as safe as I can!

Baglady1990 said:

Well I fitted it! It is secured to the floor and won’t be going anywhere
Saying that as small as the sub is it’s too big to fly forward from under the passenger seat if god forbid there was a collision
In part due to in being sat inside the recess the highest end being forward under the seat
Nevertheless it’s bolted to the floor now with anti rust added!! A pain in the ass but best be as safe as I can!

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Good for you .


Go watch some crash test videos and imagine where it might end up if it were not firmly secured, especially in a rollover.

https://www.youtube.com/watch?v=58zqJCtUjSI

jrkitching said:

Go watch some crash test videos

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This !!

There are calculators online that will tell you the relative mass with g acting on it uk the event of an accident.

Having a quick look a 1kg sub could become more than 200kg in the event of a 30mph accident, 200kg of unsecured weight is not only going to move the seat to find its way out, but will also remodel your legs if they are in the way.

So it’s good you’ve got it bolted in ?