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Z1000 Profile
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Date Registered: 06-2006
Location: Sydney.
TOTAL POSTS: 83
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Re: How effective is the Dynamat Xtreme?


Thank you Alan for the wonderful insight.

The reason why I brought this up was because I am unsure how much quieter X-trail would be with Dynamat, as you know some cars are just noisy no matter how much Dynamat is used.

Just a question, how many layers do you do for the doors and tailgate?

---
Cheers
William (X363)

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06 Platinum STS
3/Jun/2006, 10:42 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 06-2004
TOTAL POSTS: 37
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Re: How effective is the Dynamat Xtreme?


just one layer, I tried 2 layer don't seems to make much difference. I think one layer is quite adequate as the X-Trail is not very well insulated, the more you put on the door and the tailgate it will just make you notice more noise coming through the tyre well and the from the bottom of the chassis.

and doing the whole car in my opinion is not justiflable.....
6/Jun/2006, 3:39 pm Link to this post Send Email PM   Send Private Message MSN
 
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Date Registered: 06-2005
Location: Orange, NSW
TOTAL POSTS: 269
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Re: How effective is the Dynamat Xtreme?


I have always been disappointed with the cheap and thin so-called carpets. Does anyone think that more under-felt would reduce cabin noise?

---
John,
From Orange NSW.
My rides are:
2002 TI Auto (Series 1) in Twilight, and
2007 Maxima in Bright Silver
2008 Piaggio MP3 400 in Black
Member number: X165
6/Jun/2006, 8:47 pm Link to this post Send Email PM   Send Private Message MSN Blog
 
Z1000 Profile
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Date Registered: 06-2006
Location: Sydney.
TOTAL POSTS: 83
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Re: How effective is the Dynamat Xtreme?


Hi guys,

Thank you very much with all the inputs. I have just finished applying Dynamat to both front doors and difference is noticeable.

Here are a list of differences I have experienced so far:

1. The doors are now more solid and shut like a Merc; each door is approximately 4kg heavier than before. Downside: My wife has trouble opening/closing the door sometimes.

2. The road and traffic noises are less obvious than before. Downside: Sunroof and firewall/floor seem to be noiser now.

3. Mid bass from stereo is so much more punchier and tighter than before, minus the annoying rattling and resonnating door; the feel of a punch on my chest from a 6.5" woofer in the stock location is amazing, 80Hz is definitely attainable. Downside: High pitched vibration is now noticable on the B pillars and driver side window when I play at an unsafe level.

So summing up, Dynamat has made my X-Trail a more enjoyable car to drive; it is quieter and music now sounds twice as good.

It is amazing how 40 hours have already been spent on Dynamating and sealing doors, and upgrading the sound system. Painstaking? Yes, lots of fine cuts, sweat and swearing (unfortunatly I do all the work on the street and at night - not an ideal environment if you ask me). Worth doing? Definitely in my opinion.

Hope this is helpful for someone who enjoys his/her music alot, only if extra weight poses no issue.

Last edited by Z1000, 3/Jul/2006, 9:50 pm


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Cheers
William (X363)

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06 Platinum STS
3/Jul/2006, 9:49 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: How effective is the Dynamat Xtreme?


William,
 Any pics mate. So, how much Dynamat did you end up using for the two front doors. $$$$

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BRETT72 - X235

3/Jul/2006, 9:59 pm Link to this post Send Email PM   Send Private Message MSN
 
Z1000 Profile
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Date Registered: 06-2006
Location: Sydney.
TOTAL POSTS: 83
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Re: How effective is the Dynamat Xtreme?


Brett,

Sorry, I was too busy to take any pic during the whole process as I had many tools and bits and pieces on the sidewalk, everything looked chaotic around the car.

However there are many wonderful instructions and pictures on the caraudioaustralia forum.

I used 8 (out of 9) of Dynamat sheets from a bulk pack ($250 include shipping from ebay), but I think you can use 6 sheets for front doors (outer and inner door skins) and 3 for the backdoors (outer skin only). My doors were over-deadened..... purely for better music.


---
Cheers
William (X363)

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06 Platinum STS
3/Jul/2006, 10:27 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: How effective is the Dynamat Xtreme?


William, good to hear it all worked out well and that you gained an advantage from others input - that's what it's all about, afterall!

I could suggest you use a bit of the remaining 9th sheet from the pack to do the A-pillars. It would most likely be the plastic buzzing, and the metal/body there would have minimal flex due to the shape. I don't know how easy it is to remove the plastic trim and it may already be covered in another FAQ already on this forum...

Just reading your report has me itching to do ours, just to improve the sound of the factory speakers (hey, we're all on a budget, and mine is at the very low end!) however I have already installed some old Pioneer tweeters in the factory locations. The sound deadener will also help minimise the extra noise created by the A/T tyres, but like has already been mentioned, most of that noise is likely to be coming from the wheel arches, firewall and floorpan. The extent I'd have to go to remove that noise wouldn't be worth the hassle, but reducing it abit would help emoticon


---
Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.
5/Jul/2006, 8:53 pm Link to this post Send Email PM   Send Private Message MSN Yahoo Blog
 
Z1000 Profile
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Date Registered: 06-2006
Location: Sydney.
TOTAL POSTS: 83
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Re: How effective is the Dynamat Xtreme?


Rich,

You don't need to spend a lot of $ to get a good sounding stereo at all. Simply by sealing your door service holes with duct tape and some plywood or mdf, you can improve the mid-range considerably. This was actually the first thing I did to the X-Trail before a total stereo upgrade. Get some foams to jam between door trim and inner door skin and things will sound whole lot better. Total cost for me: $10 for a bag of left-over foams from Clark Rubber.

The stock front speakers do not pump that hard hence you do not need to dynamat doors at all. FYI I have tried stock speakers with overdeadened doors, and I can only say the speakers must have costed Nissan no more than $10.

I can imagine how noisy A/T tyres are and IMO the hassle you have to go through to lower that noise by a bit is very uneconomical and time consuming.



---
Cheers
William (X363)

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06 Platinum STS
5/Jul/2006, 10:24 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 09-2005
Location: Sydney
TOTAL POSTS: 165
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Re: How effective is the Dynamat Xtreme?


Hey Will, just wondering what speakers you used and do the 6.5 inch speakers go in the factory position or do mods need to be made to the inner door? Just curious as I have a set of Focal Polyglass 6.5inch splits laying around doing nothing.

---
You don't know what ya missin, without a NISSAN


6/Jul/2006, 6:24 pm Link to this post Send Email PM   Send Private Message
 
Z1000 Profile
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Date Registered: 06-2006
Location: Sydney.
TOTAL POSTS: 83
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Re: How effective is the Dynamat Xtreme?


Shane,

I use Pioneer TS-C160R which has a mounting depth of 61mm. It goes into the factory position and you don't even need to modify inner door at all.

I removed the factory speaker, put two layers of Dynamat on front and back of the inner door skin. Made up a ring spacer with two 12mm mdf.

Once the speaker is installed, there is still a 8mm gap between window and the speaker magnet, while the front still has 6mm space to the factory grill. So I believe fitting a speaker with max mounting depth of 70mm with the factory speaker grill should be no trouble at all.

Couple of notes on the installation:
1. I put a ring of closed-cell foam between inner door and spacer, and also between spacer and speaker to make them air tight.
2. Don't forget to attach some sort of weather shield behind the speaker magnet, as the inner door gets quite wet when I pour a bucket of water on the door to simulate heavy rain.

If your speaker is longer than 70mm, it is still possible to install it without modifying the inner door skin. How? It is simple really, once you have removed the door trim, you can easily remove the speaker grill (two clips and some melted points), then make a much longer spacer and use your focal speaker grill on the top. It looks cooler I'd imagine.

Put your Focal into action and you wont regret it.

I am experimenting with sound staging and frequency tunning at the moment. My thoughts so far:
1. I will be making an angle spacer to have woofer pointing to the headrest of opposite side.
2. Relocate the tweeter to the new angled spacer together with the woofer, so I don't have to worry about phase problem and ear piercing high frequency.

The beauty of such setup is the door can be restored back to the factory look if required.

If you have any further re installation, do not hesitate to ask.

---
Cheers
William (X363)

-------------------
06 Platinum STS
6/Jul/2006, 10:23 pm Link to this post Send Email PM   Send Private Message
 


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