sub in spare wheel well?

[Uku]

ok did a search and found nothing useful , i want to put a sub in the spare wheel well , im running 17's so im gonna lose the spare wheel and live with tyre weld and a compressor , anyone know a good link for a build guide or a suggestion for the build id be greatful

[Bluefox]

To be honest, the spare wheel well isn't big enough to get a good sound from - if space is an issue, a custom built side mount one by the suspension turrets will be the answer.
Is there a reason you want the sub in there? Or is it just a space saving issue?

[S11EPS]

To be honest, the spare wheel well isn't big enough to get a good sound from

That's not necessarily true - it all depends on what driver you're using.

Some JL subs, for example, have an ideal enclosure size of less than 0.8 cubic feet.

The enclosure I have in my car (in which my JL sub sits) would take up approximately the same volume as the spare wheel well and it sounds awesome. (It's a JL designed enclosure).

Think about some of the 'pre-loaded' enclosures you can buy off the shelf - they're tiny, yet they can still sound great.

What I do agree with is that if you use a sub with a required enclosure size of, say, 4 cubic feet and you stuff it in the spare wheel well it will sound pap.

So, if you're hell bent on using this space, take some dims of the wheel well, calculate your available cubic space and buy a driver that will work on this space (most drivers will state the thiele parameters on the box, which will allow you to calculate the amount of space required/ideal space).

[Len]

I would have thought that the depth of the sub would be the real guiding factor.
Most really good subs are big front to back (ring to back of magnet) The wheel well wont be deep enough for some speakers!

Rough calcs I just did give just over 2 cu ft for that well. So a lot of speakers will suit but its that depth!

[S11EPS]

Rough calcs I just did give just over 2 cu ft for that well. So a lot of speakers will suit but its that depth!

What did you estimate as the given depth Len?
When I think of my spare wheel well, the depth is massive (even bigger in the wife's A4 Avant - what did you guesstimate for a MK2? 10"?

[Len]

Yes Si my guess was 10". Thats what I based calcs on.

Was thinking of the tyre width. 185/195's as standard??

So actually thinking about it again maybe that on the high side.

[S11EPS]

Does the top of the tyre sit level with the boot floor on a mk2?

[Len]

That I dont know for sure, was guessing from the few I've seen.

[mk2mark]

The tyre sits proud a few inches, so there's really not much room. Can't think of anywhere handier to put the sub than to the side of the boot TBH, especially if you're using fibreglass which I'd assume you would be for the spare wheel idea.

[Uku]

aye im still in two minds about it , i was thinking of raising the floor though to make the volume/cubic space needed , if i used 2x2 (maybe bigger) wood to create a frame then mdf to make a false floor , cut out and router a hole to sink the sub into then use a perspex (prebought) cover to protect , surely that would give enough? especially with the tyre removed?