Anyone tried installing a sub in the boot/trunk? - LotusTalk

Freddofrog · 10-01-2009, 07:47 PM

I have a 12" sub which was bees nees in it's day (Rockford Fosgate 12" Pro Series). Given it's size there was no way I could fit it in the cabin but thought I might be able to put it in the boot. In my 2004 Rover S2 there is a space behind the battery above the wheel arch which would make a good home for it.

Anyone tried anything similar? Any thoughts?

Shane

txdude · 10-01-2009, 07:49 PM

No, but then again my boot leaks from the tail lights so that would be a disaster

Thomasio · 10-01-2009, 07:53 PM

How would the sound get into the cabin?

...m... · 10-01-2009, 07:56 PM

...in a car already predisposed to snap oversteer, you really don't want to be adding significant weight behind the rear axle if you intend to drive it hard...

...i suggest replacing your deep 12" with something better-suited to a cabin installation, closer to the car's center of gravity...

Freddofrog · 10-01-2009, 08:03 PM

Hadn't thought of that but mine is water tight afaik

Freddofrog · 10-01-2009, 08:09 PM

Quote:

Originally Posted by Thomasio

How would the sound get into the cabin?

I would have thought it was no different to all the "doof doof" cars around with subs in their boots.

Freddofrog · 10-01-2009, 08:16 PM

Quote:

Originally Posted by ...m...

...in a car already predisposed to snap oversteer, you really don't want to be adding significant weight behind the rear axle if you intend to drive it hard...

...i suggest replacing your deep 12" with something better-suited to a cabin installation, closer to the car's center of gravity...

At most it is 5kg which is less than 1% so I don't think it will adversly effect the handling. I've looked at in cabin installations and not happy with any of the "normal" solutions. I'm trying to keep it looking as original as possible.

FIL · 10-01-2009, 08:29 PM

I suggest headphones. Or just enjoy the sweet sound of the 2nd cam!

LotusLamberti · 10-01-2009, 09:04 PM

Quote:

Originally Posted by Freddofrog

I would have thought it was no different to all the "doof doof" cars around with subs in their boots.

there are a lot of cars that go "doof doof" with subs in their boot, but they typically do not have things that go "vroom vroom" between the speaker and the cabin.

Freddofrog · 10-01-2009, 09:07 PM

Quote:

Originally Posted by LotusLamberti

there are a lot of cars that go "doof doof" with subs in their boot, but they typically do not have things that go "vroom vroom" between the speaker and the cabin.

lol, good point....hmmm......

rob13572468 · 10-02-2009, 04:38 AM

The sub can be mounted in the boot but it would need to be built into a bandpass configuration (e.g. the woofer sits in a box and fires into a second box.) The second box has a port that runs from the boot into the vehicle cabin. with a 12" the port would need to be around 4" in diameter which could be done as there is room under the rear clam on the passenger side.

Note that bandpass designs are self-loading which means that the woofer movment is controlled even when the top is off the vehicle and can produce big output. Because of this a bandpass box is ideally suited for an open top vehicle.

Viggen · 10-02-2009, 05:49 AM

bandpass boxes sound awesome.... but they weigh a TON

does the boot even have enough room to hold a power 12?

I would think like others stated, throw something small up front

shadowhusky · 10-02-2009, 06:14 AM

I built a isobaric bandpass box with 2 Pro JL Audios in my convertible Z24 that I had well over 10 years ago. It had amazing bass when the top was on or off. But as previously stated they are very heavy boxes. THe bandpass boxes offer better control of the woofer and the isobaric configuration gives added control and great power haddling abilities. I just went with the stealth box in this car,that way I can easily take it out if the passenger needs more room. mine isnt even bolted in it fits so snug.

Tracktimeplz · 10-02-2009, 06:22 AM

IMO this is just as bad as TVs in the head rest.....take one hard corner and that sub goes through the clam...

MNlotus · 10-02-2009, 06:26 AM

get one that fits in the passenger footwell, it will balance out the car more and sounds great

Slipstreamer · 10-02-2009, 06:29 AM

Quote:

Originally Posted by Thomasio

How would the sound get into the cabin?

mrcarcrazy · 10-02-2009, 09:00 AM

Quote:

Originally Posted by Thomasio

How would the sound get into the cabin?

By pure magic of course!

For some reason that reminds me of a guy I raced back when I had my first miata. he was an an "extreme S10". He had a throttle body that made a little whistle, so he told everyone it was supercharged. I asked him to open the hood. He did...."Well Where's this supercharger?"

him: its back behind here (Pointing down hear the pass lower firewall).

me: wow, so how does the air get to the intake?

him: well, it comes around here, and then around (waving his hands over the engine like a cracked out magician.)

me: wanna race?

So after I beat him, he says "I forgot to do something, can we go again"

me: (being a kind person) "sure"

so we line up, he hops out of his truck and Lowers the Tailgate hops back in and says "ok, I'm ready"

Guess who won?

AgentTripleX · 10-02-2009, 09:38 AM

I've got my amps in the boot and my sub in the passenger footwell. It seems to be the best lay out as I have a fairly big sub. Initially I had one amp behind the passenger seat, but when I added another amp and the sub my passengers became squished so I had to have the amps rewired. Ugh.

apk919 · 10-02-2009, 10:29 AM

Quote:

Originally Posted by Tracktimeplz

IMO this is just as bad as TVs in the head rest.....take one hard corner and that sub goes through the clam...

That would make an awesome fail video!

rob13572468 · 10-02-2009, 06:16 PM

Quote:

Originally Posted by Tracktimeplz

IMO this is just as bad as TVs in the head rest.....take one hard corner and that sub goes through the clam...

it would need to be bolted in place.. otherwise not a good idea. also keep in mind the guy asked if he could put a 12 in the trunk and have it work, which he could. Nobody said that it was necessarily the best idea: its always a bad approach to say," i have this sub laying around and want to use it in the elise.. its much better to always spec a proper sub to the vehicle but not everyone has the money to do that these days.

Now as far as the stealthbox, they sound great but honestly i find the loss of legroom atrocious and if you have anyone that is taller than 5'6" they have to keep their knees bent. The *best* approach to having decent bass in the elise would be to build a bandpass 8" out of carbon fiber and have it mount just under the right side of the clam (unless you have a supercharger)... that way you dont lose legroom or trunk space.

10-01-2009, 07:47 PM	#1 (permalink)
Freddofrog Registered User Join Date: Jul 2009 Location: Australia Posts: 31	Anyone tried installing a sub in the boot/trunk? I have a 12" sub which was bees nees in it's day (Rockford Fosgate 12" Pro Series). Given it's size there was no way I could fit it in the cabin but thought I might be able to put it in the boot. In my 2004 Rover S2 there is a space behind the battery above the wheel arch which would make a good home for it. Anyone tried anything similar? Any thoughts? Shane

10-01-2009, 07:53 PM	#3 (permalink)
Thomasio really light stuff Join Date: Jul 2003 Posts: 3,503	How would the sound get into the cabin? __________________ 07 SY Exige S Really Light Stuff Intercooler . RLS Tubes . RLS Water/Methanol Injection . RLS 3.0" Pulley . RLS Wing Plates . RLS CF Window Panel

10-01-2009, 07:56 PM	#4 (permalink)
...m... Denuo Volatilis Join Date: Jun 2008 Posts: 2,715	...in a car already predisposed to snap oversteer, you really don't want to be adding significant weight behind the rear axle if you intend to drive it hard... ...i suggest replacing your deep 12" with something better-suited to a cabin installation, closer to the car's center of gravity... __________________ 2005 Federal Elise \| Touring \| Storm Titanium ...73,000 miles and aging beautifully... 2000 New Beetle \| Turbo \| Reflex Silver ...107,000 miles of steadfast service...

10-01-2009, 08:29 PM	#8 (permalink)
FIL Serial Thrilla Join Date: Jun 2006 Posts: 236	I suggest headphones. Or just enjoy the sweet sound of the 2nd cam! __________________ 05' Elise - BWR supercharger, Quaife LSD, Nitron Race Triple Adjustable, LETSLA, Larini Decat, Larini Exhuast, ACT HDSS, Fidanza flywheel, V2 Fuel Tank, V2 Steering Arms, BWR sway bar, desnorkled, ForcedFed CF splitter, Manly's engine mounts, S111 harness bar, Schroth harness w/ S111 seat grommets, Oil Drain Valve, Painted Black Diffuser, Braille battery, Custom Battery Switch 05' Corvette - Z51 Convertible - 630hp 6.6L [DON'T YOU JUDGE ME!!!] (SOLD!)

10-02-2009, 05:49 AM	#12 (permalink)
Viggen Registered User Join Date: Dec 2006 Location: Dayton, Ohio Posts: 344	bandpass boxes sound awesome.... but they weigh a TON does the boot even have enough room to hold a power 12? I would think like others stated, throw something small up front __________________ Exige S summer 2010.... hopefully

10-01-2009, 07:49 PM	#2 (permalink)
txdude Registered User Join Date: May 2009 Location: Ellsworth SD Posts: 137	No, but then again my boot leaks from the tail lights so that would be a disaster

10-01-2009, 08:03 PM	#5 (permalink)
Freddofrog Registered User Join Date: Jul 2009 Location: Australia Posts: 31	Hadn't thought of that but mine is water tight afaik

10-02-2009, 04:38 AM	#11 (permalink)
rob13572468 the devil's advocate... Join Date: Feb 2005 Location: chicago Posts: 883	The sub can be mounted in the boot but it would need to be built into a bandpass configuration (e.g. the woofer sits in a box and fires into a second box.) The second box has a port that runs from the boot into the vehicle cabin. with a 12" the port would need to be around 4" in diameter which could be done as there is room under the rear clam on the passenger side. Note that bandpass designs are self-loading which means that the woofer movment is controlled even when the top is off the vehicle and can produce big output. Because of this a bandpass box is ideally suited for an open top vehicle.

10-02-2009, 06:14 AM	#13 (permalink)
shadowhusky Registered User Join Date: Jan 2008 Location: East China, Michigan Posts: 344	I built a isobaric bandpass box with 2 Pro JL Audios in my convertible Z24 that I had well over 10 years ago. It had amazing bass when the top was on or off. But as previously stated they are very heavy boxes. THe bandpass boxes offer better control of the woofer and the isobaric configuration gives added control and great power haddling abilities. I just went with the stealth box in this car,that way I can easily take it out if the passenger needs more room. mine isnt even bolted in it fits so snug. __________________ 2005 Elise, Aubergine, Touring Pack, Sport Pack, Hardtop, Quicksilver Exhaust, Cup Air Box, Tilting Clam, Mesh Grills all around - ( fabricated, not purchased ) 55w 6000k HID's, Painted Engine Covers, Center Console, A/C Surround, Polished Shifter Arm, Ball,and E-Brake Handle, Multivex Mirrors. 2008 Jeep Liberty, Jeep Green Metallic 2002 VW Jetta TDI, Metallic Blue, Daily Driver, 155,000 miles and going strong

10-02-2009, 06:22 AM	#14 (permalink)
Tracktimeplz Race lines on the mind Join Date: Apr 2008 Location: Northwest Florida Posts: 1,085	IMO this is just as bad as TVs in the head rest.....take one hard corner and that sub goes through the clam... __________________ 2003 Honda S2000 - Suzuka Blue 2005 Magnetic Blue Elise Forcefed 275 turbo - Sold 05/20/09

10-02-2009, 06:26 AM	#15 (permalink)
MNlotus 06 elise Join Date: Jun 2004 Location: apple valley MN Posts: 812	get one that fits in the passenger footwell, it will balance out the car more and sounds great __________________ 2006 Lotus Elise-way too many mods to list (k24 swap planned. 300+whp) http://www.youtube.com/watch?v=tjIcCsvhWvY 2003 Caterham Super Seven DeDion http://www.youtube.com/watch?v=Z1ysO...e=channel_page

10-02-2009, 09:38 AM	#18 (permalink)
AgentTripleX #101 Join Date: Mar 2006 Location: San Francisco Posts: 3,101	I've got my amps in the boot and my sub in the passenger footwell. It seems to be the best lay out as I have a fairly big sub. Initially I had one amp behind the passenger seat, but when I added another amp and the sub my passengers became squished so I had to have the amps rewired. Ugh. __________________ http://www.facebook.com/SPRVXN www.twitter.com/autoVXNS http://sprvxn.tumblr.com/ "We always deceive ourselves twice about the people we love - first to their advantage, then to their disadvantage." Albert Camus "The refusal to choose is a form of choice; disbelief is a form of belief." Frank Barron

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