OK, good people of Copenworld, I have at last saved up enough of those shiny gold discs to purchase a new pair of Fli speakers and an In Phase ultra compact active subwoofer for Neville. I replaced the speakers last weekend, which entailed drilling new holes in the door and a little bit of soldering. All good except when I set the bass to what I would term a decent level, the door cards/door rattle like my Granny's teeth in a glass of water! So ... I have purchased some Silent Coat sound deadening material and my question is where best to place it: the YouTube videos all show it being placed on the inside metal part of the door (having removed the plastic weatherproofing) but should I place any on the inside of the door cards as that seems to be where the bulk of the rattling is coming from? Any advice on this would be much appreciated. Do I tuck any in behind the speakers themselves? The subwoofer will eventually be mounted between the seats - do I need to do any soundproofing work in this area????? I'm sure that once this is all completed properly the improvement is gonna be massive! Many thanks in advance, Copenistas, for any nuggets of advice or experience that you can offer.
Firstly, start by putting a sheet of it on the section of the outer metal door skin directly behind the speaker. This will dampen some of the vibration and sound coming directly off the back of the cone. With the door card removed, completely cover the metal of the door that's normally covered by the door card. This includes all the gaps in the door, with the obvious exception of any holes used for mounting or wiring. While you're at it, wrap either the deadener or some duct tape around the arms for the door locks and door handle, as this will add some weight to them and dull any vibration. For the door card itself, you can get a roll of adhesive foam, which should reduce vibrations in it. Hope this helps!
Assuming you have a variable crossover point for the sub in the head unit, try sending more of the bass to it - it's the lower frequencies that cause the most rsttles, plus taking away the long cone excursions from the mid drivers should allow them to go louder and improve sound quality My Kenwood sub is Velcro'd to the back panel behind my seat - provided you are not over 6' tall (and you don't drive lying down!) there's enough seat space left plus the bass energy comes through the seat - so you still get the benefit with the lid down
InPhase Sub, eh? A wise choice sir - here's mine and with it's special carpet "hat' made from car floor carpet material (a couple of hours cutting and sewing) Its mounted behind the passenger seat takes about an inch away from the fully back position of the seat but is not really noticeable and I can still use the net & cupholder for stuff. Also, if the worst ever happens then it is easily removed without leaving much trace of it ever having been there. The camera flash makes it look grey but it's black carpet. Mr Manty is right about reducing the bass going to the door speakers and then experimenting with the vol & cut-off of the sub. My Sub vol cable is threaded under the armrest between the seats and is mounted with some 3m tape just about the handbrake. As for sound deadening I've stuck some NVH sheet on the back behind the sub and the seat (as shown in the photo) but it really needs something a bit more substantial to eliminate all the vibrations. However, it's a vast improvement on just having door speakers.
Well, @gotboost?, @stonemanty and @Your Majesty, I am truly indebted to you for your valuable advice . I shall crack on, as directed by gotboost?, to place the sound deadening on the outer door skin, behind the speaker, and then across the inner skin. The adhesive foam is a good idea. I am sure it will make a massive difference. Love the pics, Your Majesty, and I think the idea of a woolly bag to wrap the sub-woofer in is a great idea. Magic team - really appreciate all that advice! Yay for Copenworld!
