Need help from experienced installers.

Had a couple particular questions that were bothering me. I should be getting my headunit on Monday so I am going to be installing the system over the week.

First, I have top mounted dash speakers. Should I use my deadener matieral in the hole they are mounted in? Just the bottom or both the bottom and sides? 4" mids is what is going to be mounted there. The tweeters I am not sure where they are going until I listen to them in different locations.

Next, I know polyfill is used for sub boxes that are a bit small for the sub placed in them but what about a box that is a bit larger than the spec? Would polyfill help at all? If so could I just stuff it in there through the terminal cap hole or am I going to have to unmount my sub?

Last, would deadener help in the doors even though I have no speakers there? Maybe help insulate the truck more to keep in the sound?

 

maybe you can help calculate my actual box cubic airspace.. ill post the size of it in a few minutes. It was supposed to be 1.3 cu but i think it might be a bit smaller.

 

ok its basically a box style with a wedge end to it.

its 13.5" tall, 13.5" wide, 12" top depth, 17.5" bottom depth, 5/8" Thick

 

i come up with 1.172 cubic airspace.. then when you figure sub displacement in there it ends up being about 1.1 or so? Since Infinity states to use a 1.0 box plus polyfill , a 1.1 box without should be right on... i think lol.

 

yeah Viking this is for the ranger.

 

I am not really familiar with Polybagging just a few things here and there about it. Basically you isolate the speaker with plastic then fill it with polyfill I think? Maybe if i used this thing http://www.crutchfield.com/S-vNx6kvaMyfB/cgi-bin/ProdView.asp?g=760&I=237XT40&search=baffle then stuffed with polyfill? Would that be the same? Should I cut a few holes in the bottom so the speaker can breathe or no?

 

explain to me a little more how to poly bag though. I have never done it or seen it done before.

 

ok so this is what I plan on doing... please tell me if I am doing anything wrong. From top to bottom.. Speaker.. then the air tight baffle from crutchfield.. then onto a ring of MDF.. then a layer of deadener placed on like a gasket.. then onto the sheet metal. Inside the baffle is polyfill .. then I am going to silicone over the hole that I am going to have to poke in it to run the wires to.. making a perfectly air tight enclosure with polyfill in it sitting on an MDF ring connected by sound deadener onto the sheet metal.. sound ok?

on a side note i found a company that builds 150amp alternators for my ranger.. which is a 65amp alternator stock. Cost is 140 bucks shipped with lifetime warranty.. sounds tempting.. could just do the big three when I changed it out. Prolly don't even need that much extra power but could not hurt.

 

im a little bit of a perfectionist when it comes to sealing something.. if its supposed to be sealed then damn it its going to be sealed. My sub box had a small leak in it.. i pushed the cone and watch it slowly return.. found it it was my terminal cap so i silicones that sucker in there and bam problem solved. The difference between almost sealed to fully sealed is quite a bit from this sub. So since that happened I am for sure going to be sealing these speakers... going to use the same technique for the rear 5x7s as well. The deadener as a gasket should really reduce the vibration and further seperates the speaker from the sheet metal... all the better. This ranger should sound very nice. Thinking about entering it in some local SQ competitions when I get done just for fun and maybe learn a thing or two from the pros. Plus I doubt they will believe me when I tell them my actual cost for the system lol.. plus the sony xplode amp will really throw them off.