question for those with 6x9s

[LikeNew02]

I replaced my stock 6x9s and rear amp with polk 6x9s and Rock Fosgate amp(40 watts x 2). Amp is set to only cross over < 80 HZ

The new 6x9 hit harder and sound better(no paper sound), however, at higher volumes they will rattle with some music(hip hop, or some rock with the bass guitar)

I know that the new speakers are in tight, and I don't remember if the stock 6x9s also rattled because I removed them so quickly.

Do you guys have any ideas to get rid of the rattles. I have couple possible ideas to remove the rattles:

1. dynomat

2. put some foam between the metal tray that the speakers fit into and the carpeted board that covers the speakers. a guy that owns a local stereo shop suggested this. he said that they use the foam the comes in the mtx amp boxes. i'm not sure what type of foam this is.

any other suggestions?

ps the funny thing is that songs with bass drum type bass sound fine, but then songs with real low type bass rattle

 

[LikeNew02]

ok. i see that you guys are having trouble with my question.

Could somebody please answer this:

if you have the stock 6x9s in your deck lid, do they that rattle when you turn it up?

 

[HyeLifeLS]

Is it the rear deck rattle or maybe it's too much power to the speakers and they can't handle it?

I have 6x9 Infinity Kappas in the rear deck powered by a 2x80watts rms Alpine V12 amp, the deck doesn't rattle at all, but I get distorsion from the speakers if I put the volume of the bass to much.

 

[KenRosier]

The question that you have to answer is as follows: Is this a mechnical rattle or is it a performance problem. If it is a mechnical rattle then you most likely just need to add speakers gasket between the speaker and the deck mounting and that will solve your problem. But I am a little concerned that the problem is a result of the Polk speakers being under powered by the 2x40 amp. When you hear the sound of an amplifier clipping it can be quit nasty and in many cases the square wave that is caused by the clipping will cause the speakers to rub the basket and result in a nasty rattle on peak transients.

Turn the system up until the problem starts to appear, climb back there and the answer will be obvious.