XJ XJ8 / XJR ( X308 ) 1997 - 2003

Trunk Subwoofer

 
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Old 01-09-2019, 09:27 PM
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Default Trunk Subwoofer

was looking at a 1200 watt subwoofer 2 12's for the trunk, but after reading i've seen that they're not going to hit any bass because of the fuel tank. is that true?
 
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Old 01-09-2019, 09:34 PM
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Not true, I run two 12 inch Memphis Audio subs in a ported box firing towards the rear/lights, I get crisp & clean bass. 1200 watts is likely overkill as I run 350-500 & get excellent results.
 

Last edited by King Charles; 01-09-2019 at 09:36 PM.
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Old 01-09-2019, 09:36 PM
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Did you feel bass inside?
 
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Old 01-09-2019, 09:39 PM
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Originally Posted by omgimali View Post
Did you feel bass inside?
Absolutely, I also made sure all of the OEM sub/speaker debris was removed from the rear shelf to avoid rattles & allow the bass to port to cabin. These cars' trunks have really nice acoustics.
 

Last edited by King Charles; 01-09-2019 at 10:18 PM.
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Old 01-10-2019, 02:07 AM
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One very important thing is to make sure the sub box is mounted as securely to the chassis as possible. Not just velcroed to the carpet, or held in loosely. Ideally it should be bracketed to something steel. You'll be surprised how much the bass travels through the car, rather than the air
 
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Old 01-10-2019, 09:51 AM
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I am working on this project right now you can follow what i'm doing on a recent thread on here. I'm just cutting open the hole on the rear deck and removed the rubber plug and insulation to make sure I hear the bass from my trunk well.
 
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Old 01-10-2019, 02:41 PM
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Originally Posted by John Baker View Post
I am working on this project right now you can follow what i'm doing on a recent thread on here. I'm just cutting open the hole on the rear deck and removed the rubber plug and insulation to make sure I hear the bass from my trunk well.
With two quality 12 inch subs he'll be fine without doing that. I'm against cutting older cars for ports etc. as I've found the material you cut is likely to lose/lost elasticity & will rattle/creak/crack w/ time dealing with bass. If one removes the old speaker & it's debris from the shelf, the bass ports lovely from the trunk. I'll try & upload a video demonstrating the bass clarity & depth tonight, although I'm not sure how well that will translate w/ my phone's video.

I tried the porting bass from the trunk via cutting w/ a couple older cars & it always ended up with me chasing noises lol.

Good luck on your project though.
 
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Old 01-10-2019, 04:10 PM
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That's fine if you have the premium system to start, but if not, you need to open up the hole in the parcel shelf, and the sound deadening layer beneath it. I believe this is the 'rubber plug' he is referring to.

I did something similar on a previous XJ, and went to a local car stereo shop and picked up a 6x9 speaker grill that was going free, and installed that in the parcel shelf, to cover the giant hole I had just cut.
It was a lot easier than trying to source a genuine Jaguar parcel shelf with the premium speaker grill
 
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Old 01-11-2019, 05:18 PM
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Originally Posted by grandell View Post
That's fine if you have the premium system to start, but if not, you need to open up the hole in the parcel shelf, and the sound deadening layer beneath it. I believe this is the 'rubber plug' he is referring to.

I did something similar on a previous XJ, and went to a local car stereo shop and picked up a 6x9 speaker grill that was going free, and installed that in the parcel shelf, to cover the giant hole I had just cut.
It was a lot easier than trying to source a genuine Jaguar parcel shelf with the premium speaker grill
I was speaking from my experience of doing the cut hole/port sub-woofer route w/ my previous 2001 XJ8 it was the base system & I encountered rattles & creaks where the cutting was done. It was done by a top audio shop, but the rear shelf was just so UV baked it had zero give & the port compromised it's already taxed integrity even more so. Removing the soundproofing & whatever else is under there is more than enough for proper subs to fire through without holes/etc.

Just my 2 cents, as it drove me batty when I had it done to my LWB lol.
 
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Old 01-13-2019, 01:25 AM
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No kidding, I run a pretty mild setup, about 300W to a single 12" sub and sometimes I think the car is running lumpy until the current track stops.
 
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Old 01-29-2019, 11:20 PM
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Originally Posted by omgimali View Post
Did you feel bass inside?

Not sure how this translates w/ phone quality video compression etc. But here's w/ volume @ 20 it goes to 50 on the head unit, I keep the subs @ 75%,bass @ 3 out of 5 via audio settings. I get no rattles & I definitely feel pulses when I want to.

https://plus.google.com/photos/photo...40041681441122

https://plus.google.com/photos/photo...71617949207090
 

Last edited by King Charles; 01-29-2019 at 11:36 PM.
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Old 01-31-2019, 05:55 PM
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how tough was the install?
 
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Old 02-01-2019, 12:48 AM
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Originally Posted by omgimali View Post
how tough was the install?
Not sure what the wiring entailed because I had it professionally installed, but the sub box just sits in the trunk firing towards the rear.
 
 
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