4 replies to this topic

[Neilos]

Hi,

Ive currently got 6x9's under my seats amped, and infinity 16.5cm speakers as a standard fit on my parcel shelf. It sounds good, but want a sub, what do people rate to these subs...

http://caraudiosecur...ts_id/3649.html

...And will a sub work ok in my boot if there are apeakers fitted on the back shelf? - Ive just read posts about subs damaging speakers fitted on the back shelf???

Im after an active sub for simplicity. I have features on my head unit for sub output freq...etc. I also just need a fairly small sized sub aswell to fit in the boot!

[MINImiser]

When I asked about subwoofers damaging speakers on the rear parcel shelf before I purchased my sub, the answer was Yes, they infact do damage your rear speakers, however i still went ahead and was running a 10" Pioneer sub in the boot with factory standard speakers on the rear shelf, without any damage being caused whatsoever. But i may be wrong.


ED

[murtle]

Having a subwoofer in the boot with speakers on your shelf will damage your speakers it is the amount they damage them is the issue. The reason they damage them is the pressure and movement caused by the subwoofers puts pressure on the back of the cones of the speakers on the shelf forcing them to move, possibly against they way the magnet is trying to make them move forcing more resistance and making the speaker work harder. This results in bad distortion and poor quailty sound. However if your subwoofer is not that powerful the effect is reduced although it is not ideal and by far not the best for sound quality or equipment.

In theory porting the shelf would reduce this further as the pressure caused by the subwoofer is realeased through the port reducing the pressure on the speakers on the shelf. Also be aware that the speakers on the shelf will require a certain airspace to work effectivly, by filling you boot with a box this reduces this airspace and therefore quailty of yoour speakers.

there are a couple of options that i would consider.
Loose the rear shelf speakers and mount them at the front and in the rear bins and put the sub in the boot, this seperates the speakers making them work efficently if you do your sums properly with regard to airspace and enclosures.
Second is loose the back seats and have a custom install made or have a bash yourself.

[LardySBC]

Having a subwoofer in the boot with speakers on your shelf will damage your speakers it is the amount they damage them is the issue. The reason they damage them is the pressure and movement caused by the subwoofers puts pressure on the back of the cones of the speakers on the shelf forcing them to move, possibly against they way the magnet is trying to make them move forcing more resistance and making the speaker work harder. This results in bad distortion and poor quailty sound. However if your subwoofer is not that powerful the effect is reduced although it is not ideal and by far not the best for sound quality or equipment.

In theory porting the shelf would reduce this further as the pressure caused by the subwoofer is realeased through the port reducing the pressure on the speakers on the shelf. Also be aware that the speakers on the shelf will require a certain airspace to work effectivly, by filling you boot with a box this reduces this airspace and therefore quailty of yoour speakers.

there are a couple of options that i would consider.
Loose the rear shelf speakers and mount them at the front and in the rear bins and put the sub in the boot, this seperates the speakers making them work efficently if you do your sums properly with regard to airspace and enclosures.
Second is loose the back seats and have a custom install made or have a bash yourself.

Also remember that most of the time people run their 6x9s full range, so they play a lot of the same frequencies that the sub is doing. This can cause phase cancelation, which basically results in a loss of midbass normally.

Speakers behind your head is a no no really, but they can serve their purpose in certain applications.

[murtle]

Also remember that most of the time people run their 6x9s full range, so they play a lot of the same frequencies that the sub is doing. This can cause phase cancelation, which basically results in a loss of midbass normally.

Speakers behind your head is a no no really, but they can serve their purpose in certain applications.

This is true, although speakers behind you are good for your passengers When i do my install i will be having speakers behind me because i dont like just bass from the back and treble and mid from the front, it doesnt sound that good. Although i will be having speakers at the front aswell, I am considering the shelf hanging from the roof that some guy on here done, which will house cd player and speakers yey