does sound insulation to the door provide more midbass?

[desmond937]

hello forummers,
can i ask those who have experience of sound insulation like dynamat extreme, can this things provide more midbass from the mid speakers? just wondering, cos after done the modifcation on the Myvi door, the back of the speakers are directly facing the thin sheet of steel, thus producing not enough bass, at least to my taste la. so, wondering this thingy can help to boost up the midbass or not. i'm using a/d/s 236is. thanks everybody.

desmond.

 

[Kippo]

sound deadening material eg. Raamat, Dynamat, Brown Bread are used to prevent door panel vibration by mass damping.
Door panel vibration produces secondary sound which is in fact distortion (since it affects ur audio reproduction).

Speakers when installed in door may feel that it is in too much of a volume space. Hence its response flattens especially on the midrange/midbass area.

Vehicle door tend to be not sealed properly hence giving the mid speakers a bigger space volume environment. Try to seal your door inside using dynamat extreme so that ur speakers response will peak in midbass area.

 

[desmond937]

oh i see....so there may be some significant effect in increasing the midbass by applying the sound insulation to the door.

i would like to hear more comments, particularly from those who have experience themself before. i dun wish to feel regret after investing thousands of dollars in this thingy.

 

[Kippo]

you wont get 10 fold increase of midbass. There will be improvement though. if u want something better, installing 8" driver is the best way.

 

[Zenn]

usually we will get better midbass response if the speakers are mounted onto the door metal itself, and sound dampening was done on the inside panel as well as the outside metal panel. this actually makes the door become a better enclosure on its own, hence the better midbass response. unfortunately your myvi speaker is mounted on a baffle on the door plastic panel.

 

[desmond937]

can this unfortunate turn to delight? if the sound dampening is just helping abit, i think i wouldn't want to fork out so much of money for that d. hehe.....

 

[cacin]

usually we will get better midbass response if the speakers are mounted onto the door metal itself, and sound dampening was done on the inside panel as well as the outside metal panel. this actually makes the door become a better enclosure on its own, hence the better midbass response. unfortunately your myvi speaker is mounted on a baffle on the door plastic panel.

Hi zenn, I believe this is applicable to most cars right? So, do you think it would be better if we actually mount the speakers to the metal frame? but, doing so would need a certain length of spacer right? Would this kind of requirement need a custom fiberglass door panel instead? :)

 

[Kippo]

hmmm... my understanding is that u all mount your speakers on the door panel/cover?

ahh.. in that case, it is not good since the space vol. sealing is not good.

all this while i thought u mount it on the door itself.


cacin,
most cars i've seen mount the speakers on the door it self. I'm not sure if ur car speaker is mounted on the door panel/cover.
If that is the case, u cut the door cover/panel until you can mount your speaker directly on the door. Use spacer to make your speaker flush with the door cover. For me, i use MDF spacers in which i glued 3 MDF 3/4" spacers into one.
the quickest way is to use polypipe as spacers.

 

[cacin]

Kippo,
Thanks for the info. :shades_smile:
I am not sure what car you are referring to, at least, on my iswara, that's where they mount the speakers (on the door panel). Mounting it on the metal does sounds as a reasonable thing to do, but this would require some drilling on the door metal right? I'll probably look into this when I have the time and budget. :X-:
Any specific reason why you use 3 3/4" spacer? Why not use a 1 2.25" spacer?
BTW, what's a polypipe? :embaressed_smile:

 

[Kippo]

cacin,
i need to do 3 layers of mdf before the speaker looks flush with d door panel/cover. I used 3/4" mdf coz i i cannot find 2.25" MDF thickness :D

polypipe i.e. HDPE (high density poly eurathane) pipe. Those black coloured pipe ppl use now. Go find bigger one eg. 4" or 6" and cut it a bit so that it looks like spacer.

as of drilling to door, it is up to you la. For me, my car already have that screw holes.

 

[Zenn]

ice, as in life itself, always have got to compromise. not all of us have the opportunity to check the doors if 6.5" speaker with deep magnet can fit or not, haha.....right? like iswara & myvi, they dont come with speakers in the doors. mounting it on the door metal is always good for ice (rigid mounting = better bass) but either the speaker magnet hits the glass or the front side hits the door plastic cover. if u get thin speakers with small magnets also u compromise on bass. so hav to do la whats best with money & time u have, use mdf baffle on the outside with long screws into the door metal, that works well sometimes. a good fibreglass/mdf job and cutting thru the plastic frame also can.

 

[Kippo]

zenn,
no need long screw, just make the first ring mdf wider so that u have space for screwing (dont think of other meaning hehe) and the next or further layer mdf will be where the speaker is screwed on to.

 

[Zenn]

ya la, can also...

kippo..screw you! :P haha

 

[energie]

Won't mounting the driver behind the door panel directly onto the metal without the use of any baffle cause any cancellation?

 

[Kippo]

energie,
the driver is outside the door panel but mounted to the door itself.