possible barrier

[lithium 358]

i've been looking for a cheap alternative to mlv. hows this looking, volara, density claims to be 2lbs/sq ft specs.

i plan to uses this on my doors.

Edited October 6, 2009 by lithium

[///M5 2,833]

i've been looking for a cheap alternative to mlv. hows this looking, volara, density claims to be 2lbs/sq ft specs.

i plan to uses this on my doors.

Close, nice try 2lbs per CUBIC foot isn't quite per sqft

[lithium 358]

damn, i fail at reading lol

[lithium 358]

i found something else but its a 1/4 inch think... might not work behind a door panel but if my math is right, it does come out to 1 1/8 lb/sq ft. My link specs

i figured out 4 square feet of 1/4 inch material weighs 4.5 lbs so divide that by 4 square feet and u get 1.125 lb/sq ft..

should i look for something thinner?

[///M5 2,833]

i found something else but its a 1/4 inch think... might not work behind a door panel but if my math is right, it does come out to 1 1/8 lb/sq ft. My link specs

i figured out 4 square feet of 1/4 inch material weighs 4.5 lbs so divide that by 4 square feet and u get 1.125 lb/sq ft..

should i look for something thinner?

your math is as bad as your reading. there are 48 1/4" pieces in 12", not 4. lol

[lithium 358]

i found something else but its a 1/4 inch think... might not work behind a door panel but if my math is right, it does come out to 1 1/8 lb/sq ft. My link specs

i figured out 4 square feet of 1/4 inch material weighs 4.5 lbs so divide that by 4 square feet and u get 1.125 lb/sq ft..

should i look for something thinner?

your math is as bad as your reading. there are 48 1/4" pieces in 12", not 4. lol

rofl... wow im goin to bed...

ill just order from don...

[ppiflat10s 3]

ok, well it looks like it is weighs just under 1/10 lb per sq ft. so just stack it 2.5" thick... lol

j/k, Im guessing its the fact that the good stuff is so dense, probably works much different than 2.5" thick of lightweight foam.

Edited October 6, 2009 by ppiflat10s

[Rudeboy 152]

i found something else but its a 1/4 inch think... might not work behind a door panel but if my math is right, it does come out to 1 1/8 lb/sq ft. My link specs

i figured out 4 square feet of 1/4 inch material weighs 4.5 lbs so divide that by 4 square feet and u get 1.125 lb/sq ft..

should i look for something thinner?

your math is as bad as your reading. there are 48 1/4" pieces in 12", not 4. lol

rofl... wow im goin to bed...

ill just order from don...

Now that I'm having my supplier drop ship roll quantities, MLV is actually pretty inexpensive. The problem with find an inexpensive alternative is that MLV is the inexpensive alternative to lead. There are only so many times you can make an inexpensive alternative to the inexpensive alternative before you are packing mud on your panels.

[slim2fattycake 85]

lol. Don is the man. I love my MLV.

ps- I saw this thread and thought it could be something interesting to use but I guess nothing will beat the SOUNDDEADENERSHOWDOWN!

[socialstealth 0]

Now that I'm having my supplier drop ship roll quantities, MLV is actually pretty inexpensive. The problem with find an inexpensive alternative is that MLV is the inexpensive alternative to lead. There are only so many times you can make an inexpensive alternative to the inexpensive alternative before you are packing mud on your panels.

how is MLV applied?

does it have a sticky layer? should I use butyl rope? Do I just screw the top end to a panel and let it hang?

should I put MLV on my roof or is that pretty pointless?

[slim2fattycake 85]

email or pm Don. His website (sounddeadenershowdown.com) tells you a lot about the products and how to use them as well. Check it out.

[Rudeboy 152]

Now that I'm having my supplier drop ship roll quantities, MLV is actually pretty inexpensive. The problem with find an inexpensive alternative is that MLV is the inexpensive alternative to lead. There are only so many times you can make an inexpensive alternative to the inexpensive alternative before you are packing mud on your panels.

how is MLV applied?

does it have a sticky layer? should I use butyl rope? Do I just screw the top end to a panel and let it hang?

should I put MLV on my roof or is that pretty pointless?

MLV isn't self adhesive - and you wouldn't want it to be. You get the best result when it isn't tightly bonded to the vehicle. On floors, just lay it on top of a layer of closed cell foam (CCF) and let gravity and the carpet hold it in place. I use Velcro Patches to hold it to vertical surfaces.

Barriers like MLV block directional sound. Since there aren't many noise sources directly overhead, there isn't much point in applying to the roof. Since MLV weighs 1 lb/ft² it's also a little tough to hang up there. I definitely like to put vibration damper on the roof and usually a layer of closed cell foam to help with the high frequency air turbulence noise that is often an issue.

[///M5 2,833]

Good advice. Thanks Don.

*surprised Ant didn't help...oh wait, he wasn't going to get a sale so of course he wouldn't*

Some people are worth doing business others aren't. If you don't know Rudy owns SDS and is the most helpful deadener voice on the web. If you haven't bought your vinyl look at what he has, it is priced competitive and unlike everywhere else his interest is in helping you make your car quiet. If you have just remember that for next time.

[slim2fattycake 85]

lol.

[shizzzon 461]

It also depends on what your goals are too..

I never seen the purpose of using it in this thread either.

I am an spl competitor so deadening material is a big no-no if you want high numbers on the mic.

If it's not for competition and just for musical enjoyment then it's fine.

I just know lots of people on here who may not compete tend to do so eventually with the same car they had when they first became a member.

Competing with lots and lots of sound deadening material will only hinder your potential in spl competition.

It's not talked about much on here but it's true in lots of vehicles.

[///M5 2,833]

It also depends on what your goals are too..

I never seen the purpose of using it in this thread either.

I am an spl competitor so deadening material is a big no-no if you want high numbers on the mic.

If it's not for competition and just for musical enjoyment then it's fine.

I just know lots of people on here who may not compete tend to do so eventually with the same car they had when they first became a member.

Competing with lots and lots of sound deadening material will only hinder your potential in spl competition.

It's not talked about much on here but it's true in lots of vehicles.

Shizzon come on.

MLV is not a deadener but a barrier. There is really one use for it and if you've ever read any of Lithium's threads you'd know his purpose.

Big no-no is wrong as well, it can be a tuning tool to match panel modes with acoustic modes and actually net you a gain.

[Tirefryr 1,742]

It also depends on what your goals are too..

I never seen the purpose of using it in this thread either.

I am an spl competitor so deadening material is a big no-no if you want high numbers on the mic.

If it's not for competition and just for musical enjoyment then it's fine.

I just know lots of people on here who may not compete tend to do so eventually with the same car they had when they first became a member.

Competing with lots and lots of sound deadening material will only hinder your potential in spl competition.

It's not talked about much on here but it's true in lots of vehicles.

How do you figure? Any time you can increase efficiency it's a win. There's energy being used to excite the mic instead of a vibrating panel. if you weren't worried about it, why on earth would you brace an enclosure?

[shizzzon 461]

i dont know what mlv is, i just know it has something to do with that showdown site.

What i do know is if it lowers resonance in a vehicle when it's applied then it will lower pressure levels in a vehicle.

Soft materials hinder performance, deadener hinders performance.

This is not just my own testing either, i'm speakin for more than just myself.

I havent read his threads so just throwin that out there if that's ever anyone's goal.

[shizzzon 461]

It also depends on what your goals are too..

I never seen the purpose of using it in this thread either.

I am an spl competitor so deadening material is a big no-no if you want high numbers on the mic.

If it's not for competition and just for musical enjoyment then it's fine.

I just know lots of people on here who may not compete tend to do so eventually with the same car they had when they first became a member.

Competing with lots and lots of sound deadening material will only hinder your potential in spl competition.

It's not talked about much on here but it's true in lots of vehicles.

How do you figure? Any time you can increase efficiency it's a win. There's energy being used to excite the mic instead of a vibrating panel. if you weren't worried about it, why on earth would you brace an enclosure?

If mlv is a vibration resistant material.. it's possible that it will still hinder performance because it's a soft material.

That may not be the OP's goal but i dont see it stated on here. I know removing all panels in a vehicle will actually increase pressure.

I'm not an acoustical engineer, just know what i and others see when testing.

[///M5 2,833]

i dont know what mlv is, i just know it has something to do with that showdown site.

What i do know is if it lowers resonance in a vehicle when it's applied then it will lower pressure levels in a vehicle.

Soft materials hinder performance, deadener hinders performance.

This is not just my own testing either, i'm speakin for more than just myself.

I havent read his threads so just throwin that out there if that's ever anyone's goal.

MLV doesn't lower resonance. You again are speaking without knowing about what you are talking about. Please stop e-gurgitating it is really frustrating to read your posts sometimes. You do a great service in helping people with box designs, but your ideas and knowledge base is regularly jacked and those noobs read it is as golden when it is far from. Really please stop.

[///M5 2,833]

It also depends on what your goals are too..

I never seen the purpose of using it in this thread either.

I am an spl competitor so deadening material is a big no-no if you want high numbers on the mic.

If it's not for competition and just for musical enjoyment then it's fine.

I just know lots of people on here who may not compete tend to do so eventually with the same car they had when they first became a member.

Competing with lots and lots of sound deadening material will only hinder your potential in spl competition.

It's not talked about much on here but it's true in lots of vehicles.

How do you figure? Any time you can increase efficiency it's a win. There's energy being used to excite the mic instead of a vibrating panel. if you weren't worried about it, why on earth would you brace an enclosure?

If mlv is a vibration resistant material.. it's possible that it will still hinder performance because it's a soft material.

That may not be the OP's goal but i dont see it stated on here. I know removing all panels in a vehicle will actually increase pressure.

I'm not an acoustical engineer, just know what i and others see when testing.

Again, it has nothing to do with soft. And MLV is not a vibration isolation material, not at all its goal. You should liken its use to lead, not a deadener. On top of that deadeners don't work because they are soft. The reason you believe the tests you've done and seen is that they weren't setup to be real tests. It takes some education to actually write a test plan and it has been lost on the group you are describing if you truly think that.

[shizzzon 461]

u got a link to where this stuff has been tested in an SPL application?

Not lowering resonance is a good thing. I'd still like to see a link about it though.

[///M5 2,833]

u got a link to where this stuff has been tested in an SPL application?

Not lowering resonance is a good thing. I'd still like to see a link about it though.

Think before you type please. MLV is an acoustic barrier it is NOT meant for damping. Read Don's installation instructions and tell me who it is going to affect panel modes?? No link necessary just a teeny bit of common sense.

[///M5 2,833]

Actually one of your main problems you read things on dubious places and think they are gold instead of using your head and figuring it out.

[slim2fattycake 85]

Shizzzon, the MLV from Don has a specific purpose. That is to block and not absorb.

Really, I think MLV may help with spl scores by keeping the pressure inside the car. I have asked Don before about using the MLV stuff to surround the trunk to try to guide the pressure into the cabin but he said it was not his expertise so he cannot comment. What do you think ///M5? If I line the whole trunk with the MLV then the only easy way is to go through the opening behind the rear seats and into the cabin. Seems logical, right?