@Thoggs lining as it happens
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Ditto!Its a good point, 100% coverage is not really required but i figure there is plenty of areas that you cant access so i went to town on mine
Ordered a large van kit and ran out and had to buy more and still havent done the front yet
T6 Dave's Dad
Member
@Twoguns 
Sorry, no way was I inferring that you were having a go at @warren's work but were commenting on his approach to that of the converter that had done your line out. It would be nice to have a side by side comparative sound test of the two to see if additional materials add performance. 
I was just trying to point out that the "start line" as it were is the enthusiastic amateur who does material overkill as opposed to a firm that skimp on materials. We all know that there are firms that do a job but when the work is examined then either materials have been skimped or corners have been cut. Some of these firms use rubbish materials where they can't be seen and some charge a high price too. I recognize that your aim is to try to establish what is the minimum necessary to do a proper job and give an acceptable balance between cost and performance. Like many specialist jobs the best installers get recommended by satisfied customers. 
Sorry, no way was I inferring that you were having a go at @warren's work but were commenting on his approach to that of the converter that had done your line out. It would be nice to have a side by side comparative sound test of the two to see if additional materials add performance. I was just trying to point out that the "start line" as it were is the enthusiastic amateur who does material overkill as opposed to a firm that skimp on materials. We all know that there are firms that do a job but when the work is examined then either materials have been skimped or corners have been cut. Some of these firms use rubbish materials where they can't be seen and some charge a high price too. I recognize that your aim is to try to establish what is the minimum necessary to do a proper job and give an acceptable balance between cost and performance. Like many specialist jobs the best installers get recommended by satisfied customers. 
Have you tested or tried lining the outside of the wheel arch?
I asked the company that did my conversion why didn't they line the inside of the arch with silent coat or similar and they said because the finish is not as good or won't last as long and the carpet they use has acoustic absorbing properties.
I find this hard to believe that the carpet will stop the road noise coming through and going by the noise in the van which I recorded at 85dB on motorway at 65mph confirms my belief unless it's coming in from somewhere else.
Stationary with the music playing it sounds awesome which leads my to believe that the walls and doors are all well done it's just the road noise that bothers me which again points my suspicions to the wheel arch.
T6 Dave's Dad
Member
That's answered my query as to whether the continued road noise was because the gap between wheel liner and the arch skin was acting as a sound chamber and amplifying the noise. I notice @slidepods initial sound test of @Thogg's van was 86db so your reading of 83db. is not good after all the work done on the panelled areas.
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carpet has properties that help it inhibit airborne sound reflecting back and forth around the van, this is like treating the symptoms of a headache brought on by dehydration with paracetamol! What you actually need to do is add mass to the resonating panel in order to stop the source of the airbourne sound (This is the glass of water well before the headache starts
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This is what I've been trying to get at. I've basically been fault finding my own "sound proofed" van. I will line the out side of the arch and let you know if it makes a difference as I'm happy with what they did on the walls as more doesn't necessarily mean it's better.
Dynamat/silent coat/second skin mats will dampen the resonance of the panel. This reduces the panels resonance frequency to a much lower less audible level. It won't make the van much if any quieter.
To reduce sound from road noise and wind noise mass loaded vinyl is where it's at with a closed cell foam in between to decouple.
Did my vans cab with it and going to do the bulkhead. Van is now silent.
A 3db reduction is sound noise is massive.
Epic work slide pods. A great write up for future custom.
To reduce sound from road noise and wind noise mass loaded vinyl is where it's at with a closed cell foam in between to decouple.
Did my vans cab with it and going to do the bulkhead. Van is now silent.
A 3db reduction is sound noise is massive.
Epic work slide pods. A great write up for future custom.
T6 Dave's Dad
Member
So for between the out side of the wheel arch and the plastic wheel arch liner would you put some closed cell foam? If so can you recommend a particular one or make?
This is my only possible option as the inside is now lined and carpeted.
No. The closed cell foam decouples the mass loaded vinyl so it won't vibrate around. Using closed cell foam on its own won't do much.
Put some cld matts (silent coat) on the arch metal. Then an all in one massloaded vinyl/closed cell foam such as dodo mlv. On top.
Cheers pal. I've got Dynamat extreme so will get some of what you've recommended. Is this the stuff in the link below?
Dodo Pro Barrier MLV
If this is the correct stuff would you stick the foam side to the Dynamat or the rubber side to the Dynamat and what adhesive would you use?
Sorry for the questions I just want to get it right first time.
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That's the stuff. However is doesn't like curves. Mainly flat panels as it isn't easy to manipulate. I use double sided velcro tape or aluminium tape. Foam side on the panel.
Thanks again for the info. I'll keep you all posted once I get a chance to do it and the end result. Hopefully next week.
Well @Thogg picked up his van from us today. Have to admit I am a little sad to see it go as its a beauty. The smell from its air freshener seems to have permeated into everything in the workshop though which I doubt I will ever get out so at least I have that to remember it by . We took it for a test on the same piece of road today and got an average reading of 79db (I question the accuracy of my test but am happy its not higher )
I will leave it up to @Thogg to critique our work now!
as its a beauty. The smell from its air freshener seems to have permeated into everything in the workshop though which I doubt I will ever get out so at least I have that to remember it by . We took it for a test on the same piece of road today and got an average reading of 79db (I question the accuracy of my test but am happy its not higher )I will leave it up to @Thogg to critique our work now!
T
Thogg
Guest
Full review to follow.... just need to get this late shift out of the way first...Well @Thogg picked up his van from us today. Have to admit I am a little sad to see it go
I will leave it up to @Thogg to critique our work now!
Just a phone app nothing fancy.
T
Thogg
Guest
Right, here is my first impressions "interim" review...Well @Thogg picked up his van from us today. Have to admit I am a little sad to see it go
I will leave it up to @Thogg to critique our work now!
Pre booking:
I phoned around and went to see a couple of places for my lineout in combination with researching stuff on the forum. I had a very clear idea of what I wanted to achieve but my budget was increased by a nice PPI payout. At no stage was it going to be a DIY job for me. I dont have the time, talent or tenacity for that.
My initial call with Jonny lasted about 20 minutes and his passion and knowledge on the subject had all but won me over from this point. I combined a work trip to Exeter with a visit to Slidepods and it was a done deal.
Booking the van in:
This was super easy and was made easier having met the team and visited the site. The process is well documented earlier in this thread so no need to kick the ass out of this area. I would say have a clear idea of what you want to achieve and a budget in mind. Jonny's cave of toys and his passion for his job is infectious and you could easily find yourself breaching your original budget by a significant amount!
Drop off:
I turned I. Dropped the van off. Simple.
The lineout:
I had almost daily contact with Jonny throughout the process. This set my mind at ease that and for me was really important. I changed a few things during the job... different front speakers, spinny passenger seat..
Sometimes when you move the goalposts people get the arse. Not Jonny. Sound advice throughout and I'd suggest we got the hang of each other's style of doing stuff fairly quickly.
There were a couple of snags with the van. Jonny kept me up to speed, provided videos of issues and generally just kept me well informed as to the progress and expectations for the day.
The van:
Top draw job. Workmanship, look, sound reduction, quality.. all top draw. Obviously early days but can't find anything to fault at the moment. Looks great. A much nicer place to sit and drive. Most importantly. It's as expected.... which for me... is a massive plus. When expectations are met or surpassed... you've cracked it as a company.
The sound stage:
Speaker setup sounds bloody amazing. You need the fade function activated to make the most of it. My only comment regarding improvement would be that the standard head unit struggles (at the top end of volume) to do the speakers justice. They are hungry and eager to deliver the goods.. the head unit is found a little bit wanting but only at the very top end. We are talking alone in the van, long drive, AC/DC on and no regards for hearing. At anything below that... WOW!!
The cost:
You lot didn't think I'd cover this bit did you!!?
Well here goes.
A shade over £2300.
Sound deadening.
Thermal lining
Insulation
Ply line
Carpeting
Speakers
Led downlighters
12v socket in back
Twin USB
Swivel seat
165 mil blams in the rear
200 mil blams in the front
Voltage cutout
Lots of man hours
Done.
Summary.
When I get another van. It'll be going in for a lineout with Slidepods. That's my endorsement.
As Jonny said... this is an impartial review. I haven't had any incentives or discounts to provide this review.
I will add to it a few weeks down the line. But for now...
Lineout and sound.... done.
Cheers
Tim
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