i got 2 12 inch infinity subs 1200 watts. they bump hard. but all i can hear is the rattling noise of my trunk its gettin on my nerves. i was thinking about gettin dynomates the mats that u can install to ur trunk so that way there wont any rattling noise. but i am not sure if i should get that or are there other ways to do it.

 

MM&Y of car please.

Model of Infinity subs, what kind of box are they in?

Make and model of amp driving subs?

What else does the system consist of?

Do you have rear speakers? 94

 

my car is 2007 civic lx sedan. its a wood enclosure box. and the subs are 2 12 inch subs with a duel channle sub 600 watt to each

 

First, find out what is actually rattling. Is it your license plate? That can easily be fixed by placing a small and evenly folded shop towel behind your license plate, then srewing it down nice and tight. Dont just run out and buy dynamat and expect it to fix all of your rattling.

 

nope the liscense doesnt rattle its the part of the trunk towars the rear window that makes alot of noise.

 

I am having the same exact problem, a rattling trunk. Ok I went out this morning, turned my subs pretty high with the trunk open, no rattle. The license plate seems quiet.

I started closing the trunk lid BIT BY BIT to find out where its exactly rattling. It finally came to the small closing crack and it appears my license plate is making all the rattling. So where exactly can I buy this shop towel? Can I just use a dirty rag instead? Or a old t shirt?

 

You do not want to use anything that will retain water, shop rag or anything cloth will retain water, and that means rust.

Cover the back of the plate with Dynamat, [or the like], rubber "stand offs" at bottom of plate if plate only mounts at the top, remove any plate trim, [dealer trim. 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote"> You do not want to use anything that will retain water, shop rag or anything cloth will retain water, and that means rust.

Cover the back of the plate with Dynamat, [or the like], rubber "stand offs" at bottom of plate if plate only mounts at the top, remove any plate trim, [dealer trim. 94</TD></TR></TABLE>

I have an 96 EJ7. I have abs plastic that backs my plate. Im pretty sure thats not gona rust. Though the rubber "stand offs" sound like a good idea. I've had a small shop rag behind my plate for about 4 years now and see no rust, but maybe other cars have metal backing the plate, i would take the rubber stand off route then.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esco562 &raquo;</TD></TR><TR><TD CLASS="quote"> but maybe other cars have metal backing the plate, i would take the rubber stand off route then.</TD></TR></TABLE>
That's what I do with any plate that is not screwed down at the bottom, works great.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ziwang55 &raquo;</TD></TR><TR><TD CLASS="quote">my car is 2007 civic lx sedan. its a wood enclosure box. and the subs are 2 12 inch subs with a duel channle sub 600 watt to each</TD></TR></TABLE>
OK so now I know it's an 07 Civic, but still do not know the model of the subs, make and model of the amp or what kind of sub box, [sealed, vented or band-pass]

Although Dynamat, [or other dampening materials] can help reduce rattles, it is not what they are meant to do, they are designed to dampen the "ring" that sheet metal makes when it "vibrates".
Separating a piece of plastic trim from the metal surface it covers with a layer of Dynamat can reduce rattles, but closed cell foam works better.
I always stock 5 - 8 rolls of weather stripping, diff. widths and thicknesses to use to separate things that rattle up against each other.

As mentioned, first thing to do is find what it is that is rattling, then figure out how to stop it.

One of the reasons cars with trunks rattle a lot is the air pressure produced by the sub has no place to go, to fix that, remove the rear speakers, if the backs are not isolated from the subs they are really nothing more then "passive radiators" for the subs anyway. 94

 

wow removing the rear speakers? is that really bad for ur music when u listen to it?

 

well i was thinking about gettin a carbon fiber trunk. and will that fix the rattling?

 

07 civic... so that means our rear seats and rear speakers (with that platform holding the rear speakers) are blocking the bass air producing in the trunk. I'm going to try and put my rear seats down and see if that changes anything while I'm driving. Maybe thats why my bass system sounds so crappy when sitting the rear, but sounds great in the front...