dynamat?

soundfreak1

I have read a lot of comments about dynamat on the baskets of drivers, what does it do? And the advantages? Like to learn about this. Thanks in advance. I using rta 12b and c speakers.

Outfitter03

Dampens vibration or ringing of the baskets.

soundfreak1

My ears ring sometimes, I even where a ring once in awhile, but never heard my speakers ring. Is it common with some polks?

soundfreak1

In all seriousness getting set up to do a mod on a pair of rta 12b or 12c's and have been studding a lot of threads on the subject and I get the vibration aspect for its use just.haven't hears the problem myself and wonder if its me. Darn speakers seem pretty nice to me as they are. But I know the cap age, and they can make a huge diff. When updated. Just trying to learn as much as i can before i start. Thanks

brgman

Get Dynamat Xtreme off of amazon and put it on like you see here on the forum.Lots of pics.While you're at it put JB Weld or Loctite Metal magic Steel on the magnets to prevent shifting.
You will like what you hear.
2 million polkies can't be wrong!

soundfreak1

Well that was the point of my thread. I figured there had to be something to it. Can't hurt and whilst I have them torn apart might as well. If I end up doing the c's they already have the rdo 194's in them. Also need to learn about the insolation marerial stuffed inside the cabs. The cabs are tight no major air leaks. So I guess its caps and maybe wiring. Poss. Binding posts and bottom xovers. As well.

brgman

Have fun!!!

Outfitter03

soundfreak1 wrote: »

My ears ring sometimes, I even where a ring once in awhile, but never heard my speakers ring. Is it common with some polks?

Ever play the Triangle in Grade School, same concept! From Wikepedia:


Audio

Ringing affects audio equipment in two ways. Audio electronics have the same ringing issues as do all electronic equipment, with the exception that the ringing may be audible. In addition, transducers (ie, microphones and loudspeakers) can also ring. Arguably, mechanical ringing is more of a problem with loudspeakers as the moving masses are larger and less easily damped. Mechanical ringing, unless extreme is difficult to audibly identify as such. It is usually noted as a like of characteristic 'coloration' in the sound and is very hard to describe in words.

soundfreak1

That makes it more clear to me, I have expierenced that in some previous electroncis I had but had never atributed it to the speakers per say, as a vibration. I have always refered to it as a resonance or artifactics. That helps me get my head around it better. Thanks.

JPSmario

when I dynamatted and mortited my SDA 2A's (did both at once, so I can't comment on effects of these mod's separately), my mid range seemed to open up and quiet down- more 'blackness' or space between instruments. the bass now seems to well up from the floor. I love the changes.

soundfreak1

Ok jp just got a handle on dynamat and then you start with mortite! Ok I' ll bite. Wtf is mortite? It's always something.

F1nut

The thing about tweaks is that they are additive. That is each one on its own may not make that much of a difference. However, the sum total results in noticeable improvements.

Mortite is a caulk sealer designed to be used around the home. Some folks have replaced the stock driver gaskets with it and reported good results, while others did not like the results. I believe that if the stocks gaskets are in good shape, there is no need to use Mortite. I'd suggest you do plenty of research before going down that road as there are tricks to using it properly.

fbm211

Skip the mortite.
Dont skip the dynamat extreme.It will amaze you at how much better sounding the mids are after the tweak.

soundfreak1

Got it. The cabs do seem quite air tight as far as the compression test with the passive wooded. The gaskets seem good so far. Once I get the two drivers replaced than the caps are next. Oh boy . Got to figure what brands to choose. ?????.

F1nut

If you can, get a set of Larry's rings.

soundfreak1

I read about those here but if the cabs are tight , is there any need? Or do I misunderstand there purpose.

F1nut

Yes, there is a need. The rings couple the drivers to the cabinet better than the stock screws and completely negate any concern about the gaskets. The sonic results from installing the rings is not subtle.

soundfreak1

Ok. About how much dynamat does it take to do the 2 driver baskets and i suppose the passive as well ( per cab.) And what does Larry sell the rimgs for when he has tthem aprox. Just budgeting.

F1nut

Not much.

Larry has a thread in the FS section.

JPSmario

OK, I'll bite. what is the sonic difference you hear between mortite and Larry's rings?

DON73

I'm sittin here right now looking at the silver backing on a box of dynamite I got from Amazon. Tried it on my ears but they still ring. I'm hoping that it does better when I do my 10s. The stuff is hard to get off so make sure you want it where you put it!