Ok how good/bad would a free air sub mounted where the spare tyre would normally be(in the bottom of your boot) sound.



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The drive- Nissan Pulsar 93'
Car Mods- Exhaust, 16in wheels, Pod Filter, tinted windows
'live'n the dream babey'

i think it'd work out ok, but it would end up more like a small sealed enclosure. you would need to reinforce all the steel surrounding it to stop it flexing for a start, but certainly has been done before

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Pioneer,Soundstream,Total Recoil,Rockford Fosgate,Alpine,Stinger,Dynamat and Odyssey
...Who need's a back seat anyway?
team SOUNDstream

the key with a free air sub is to seal off the front of the cone from the back, so as long as you did this it would work fine. i expect most speaker engineers make IB subs with the expectation that a boot cavity would be the size of the air behind it, so using a spare tyre well, and sealing off the baffle, may produce unexpected results due to the smaller space.

if you want to use the spare tyre well, you may be better off with a sub designed for sealed enclosures, and to fibreglass a moulded enclosure in the spare tyre well

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Custom SQ System
Dolby Prologic II in 3.1

Source: Clarion DXZ925 w/ DPL2 Decoder - Front Stage: Boston Acoustics Pro 6.5's - Centre Channel: Boston Acoustics Pro 5.5LF - Ambient Satellites: Boston Acoustics 3/4" Kortec Tweeters - Processors: Audiocontrol EQT's - Subwoofers: Earthquake BR12's - Amplifiers: Kicker IX404's - Power: Stinger 1 Farad HPM Capacitor
Sounding sweet and taking it to the street

On the other hand, if you wanted to make a biiig effort, a spare tyre well could concievable be used as the basis for an Aperieodic enclosure, venting towards the ground outside of the car.
This would take some skill with a welder, your petrol tank might be in the way, you'd have to get an engineering certificate to make sure the cars roadworthy again etc etc, but all those things aside, it could be done......

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Brain:Pioneer DEH3350B
Ears:Pioneer TS-C1620 Splits in custom pods
Booty :Image Dynamics IDQ12-D4 v.2, powered by "the-amp-whose-name-I-shall-not-mention".
Veins:Jaycar, Jaycar, Jaycar.
Still to come: A nice 2 or 4 channel front stage and a gruntmaster sub-amp.
"loud bass has been proven to instruct particular glands to release certain chemicals within our body. including serotonin and adrenaline etc.
so basically we're all getting high on bass"