Notices
Scion tC 1G ICE & Interior In-car entertainment and electronics...

Fiberglass or MDF

Old Mar 24, 2006 | 03:11 PM
  #1  
DanPorges's Avatar
Thread Starter
Senior Member
5 Year Member
SL Member
 
Joined: Mar 2006
Posts: 195
From: Quincy, MA
Default Fiberglass or MDF

If I am gonig to build a custom box into the back of my TC, something that would be very similar to the http://www.quaterwavedesigns.com single 10" enclosure, would I be better of building it from MDF or using the styrofoam piece that is there as a base and molding a fiberglass enclosure?
Old Mar 24, 2006 | 03:15 PM
  #2  
Harmonic_tC's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Mar 2005
Posts: 992
From: NW Suburbs - Illinois
Default

it depends on your ablities. If you have worked with FG before then do that. If not just use mdf
Old Mar 24, 2006 | 03:32 PM
  #3  
DanPorges's Avatar
Thread Starter
Senior Member
5 Year Member
SL Member
 
Joined: Mar 2006
Posts: 195
From: Quincy, MA
Default

I should have pointed out my abilities, sorry. I have not made a speaker enclosure or any other actual structure from fiberglass before..........but..............
I am actually a Textiles Engineer. I specialized in College in Fiberglass and High Performance Composites (Carbon, Kevlar, etc) so I have a pretty good grasp on what I would be doing.
Old Mar 24, 2006 | 03:40 PM
  #4  
SCI_TC_GUY's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2004
Posts: 3,435
From: Benton, IL
Default

I'd say make the baffle from MDF first, then tape up the foam and glass over it from underneath... then glass the 2 together.... make sure to put some sort of dowels or something in the panels of glass for extra suppost and rigidity
Old Mar 24, 2006 | 05:05 PM
  #5  
goofygrin's Avatar
Senior Member
5 Year Member
SL Member
 
Joined: May 2004
Posts: 160
From: Frisco, TX
Default

I'm looking at the same thing.

I'm probably going to build the walls out of MDF (using the general shape of the foam insert), then glass in the bottom (using the floor as the mold).

After I figure out the airspace in there (I've done some rough math, I might have to make it curve around the wheel as well to get some more airspace), I'll decide if I can flush mount the amp into the box as well... at that point, I'll build the baffle/flushmounting stuff and put it all together, seal it up, deaden it, bondo and paint it and install the woofer...

I've been looking at this woofer:
http://www.onlinecarstereo.com/CarAu...roductID=16657

It's shallow enough and takes a little box, so I think that I could make do with removing some of the airspace for a small amp (like in the 8x9x2" range). Might have to add a small vent fan to vent the amp out around the spare (unless I go with an older blaukpunkt class T PA2150 amp... they are supposed to run really cool).

I'd end up with plexi over the amp, a grill over the sub and having to cut the carpet over both.

Anyone know how much a new mat costs? LOL.
Old Mar 24, 2006 | 05:23 PM
  #6  
DanPorges's Avatar
Thread Starter
Senior Member
5 Year Member
SL Member
 
Joined: Mar 2006
Posts: 195
From: Quincy, MA
Default

I am probably going with the Bazooka EL Series 10" Subs, not sure if I am going to do 1 or 2 of them, and either an Alpine or Bazooka amp. I know the Bazooka tubes and the factory options for the TC suck, but having been around car audio for a while, I know the EL series subs are pretty decent. They also only require .33 cubic feet of air which is TINY!!
Old Mar 24, 2006 | 05:24 PM
  #7  
goofygrin's Avatar
Senior Member
5 Year Member
SL Member
 
Joined: May 2004
Posts: 160
From: Frisco, TX
Default

Take a look at that sub I linked to (there's a 12" version as well).

It's only like 2.8" deep and takes .15-.33 cf... Sure it'll use more, but we don't got more

I don't want to have to find a place to hide my amp, so I'd like to all-in-one it...
Old Mar 24, 2006 | 05:56 PM
  #8  
SCI_TC_GUY's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2004
Posts: 3,435
From: Benton, IL
Default

Those are pretty neat subs.... shallow mount makes a big defference... I've never heard the sound of them though...

I know Elemental Design's Eu-700's are 6.5" woofers that are mean little biatches!! they take .3cuft each sealed and are 150RMS watts... I've got 2 in a ported box and they cover all the frequencies rather well... they've got some good pressure to them as well for being small 6.5's....

Eu-700s CLICK

Eu-700s cranked video CLICK

Eu-700's excursion vid CLICK <<< that's a 30Hz sine tone with a ~31fps recording... gives you an idea of max excursion from the woofer... not too bad for $50each
Old Mar 24, 2006 | 08:04 PM
  #9  
OneLiterPeter's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Nov 2005
Posts: 132
Default

+1

I can't say enough about the Eu-700's I have 2 in a sealed box that's hidden below the floor of the hatch. Man do those things thump!!!
Old Mar 24, 2006 | 08:08 PM
  #10  
goofygrin's Avatar
Senior Member
5 Year Member
SL Member
 
Joined: May 2004
Posts: 160
From: Frisco, TX
Default

maybe its just ____ty audio on the intergalactic clip, but those sound like ____... there's not even a trunk lid over them to blame for the "80 year old *****" floppy sound to them...

Edit: Sh.. = poop, but ____ty comes through? :D
Old Mar 24, 2006 | 08:11 PM
  #11  
SCI_TC_GUY's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2004
Posts: 3,435
From: Benton, IL
Default

Originally Posted by goofygrin
maybe its just ____ty audio on the intergalactic clip, but those sound like poop... there's not even a trunk lid over them to blame for the "80 year old *****" floppy sound to them...
that's because they're generating enough sound pressure level to distort the audio of the microphone trying to pickup the sound... You'll never be able to get an accurate listening experience of subs from a video... like I said, the mic's on the cameras can't handle the pressure of the air moving around them.... kinda like hearing wind from an outside recording..

trust me, the Eu's sound BEAUTIFUL!!!
Old Mar 24, 2006 | 08:13 PM
  #12  
goofygrin's Avatar
Senior Member
5 Year Member
SL Member
 
Joined: May 2004
Posts: 160
From: Frisco, TX
Default

OK I'll buy that... plus it was ported and I'm sure the port noise wasn't helping...

Those are pretty deep though (almost 4 inches... the foam in the back is 5" tall... so 1/4" of fiberglass + 1/2" mdf (thins .75" mdf routed down 1/4" to flushmount) = 4.25"... a tight fit...
Old Mar 24, 2006 | 08:17 PM
  #13  
SCI_TC_GUY's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2004
Posts: 3,435
From: Benton, IL
Default

the foam is 5", then you have the baffle of 3/4" on top of it..
Old Mar 24, 2006 | 08:21 PM
  #14  
goofygrin's Avatar
Senior Member
5 Year Member
SL Member
 
Joined: May 2004
Posts: 160
From: Frisco, TX
Default

eh no... for a flush install, then the baffle height is the same as the foam... so from outside to outside you're looking at 5"... unless you want the carpet to step up...
Old Mar 24, 2006 | 09:30 PM
  #15  
engifineer's Avatar
Senior Member
10 Year Member
5 Year Member
Scikotics
SL Member
 
Joined: Nov 2004
Posts: 9,731
From: Minneapolis, MN
Default

I have heard nothing but good about the EU's and those are probably going to be what I go with when I start the sound system (just bought an 01 4Runner for the fiance.. so cash went another direction here lately ) .

I have done VERY little fiberglassing, but will be going all fiberglass when I build my next one. I used to do alot of custom wood work, and mdf is pretty simple and forgiving to build with, which is what I built my last few out of. My last was a box for 2 10s that is completely hidden between the back seat and trunk tensioners on my saturn. MDF is nice because you need little damping material, it is cheap and easy to work with. But, it is heavy. For the small enclosure you mention though, it wouldnt be too bad. Fiberglass is also nice because of the ease of making limitless shapes (other than the pain of working with glass to start with).

If you use mdf, make sure to use good mdf, dont mistake particle board for it. Use 3/4" and it comes out nice.
Old Mar 24, 2006 | 10:34 PM
  #16  
mandos's Avatar
Former Sponsor
10 Year Member
5 Year Member

SL Member
Scinergy
 
Joined: Jan 2005
Posts: 2,205
From: Newton, IA
Default

Anyone can glass if they have patience...look at me

The one for the pocket on the right will fit 700s. I'm pretty sure you can do it out of just MDF. OneLiterPeter has one I think
Old Mar 24, 2006 | 10:55 PM
  #17  
SO-CAL_TC's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Dec 2005
Posts: 627
From: Hemet, CA
Default

can any one provide me with a good link on how to do fiberglassing. Thanx
Old Mar 24, 2006 | 11:21 PM
  #18  
Shorty's Avatar
Senior Member
5 Year Member
SL Member
Scion Evolution
 
Joined: Feb 2006
Posts: 138
From: Chicago
Default

Guys Any one know what is a good size (thickness) for Plexiglass amp rack for 2amps there going to be next to a 12'' sub 450RMS 900watts??
Old Mar 25, 2006 | 12:40 AM
  #19  
Harmonic_tC's Avatar
Senior Member
10 Year Member
5 Year Member
SL Member
 
Joined: Mar 2005
Posts: 992
From: NW Suburbs - Illinois
Default

look on my site in my sig, i dont have a written how to but you can see alot of the process that i take to make a box
Old Mar 25, 2006 | 01:31 AM
  #20  
My2toneTC24's Avatar
Senior Member
10 Year Member
5 Year Member
Scikotics
SL Member
 
Joined: Jan 2006
Posts: 208
Default



before

after


when Bill built my boxes he used MDF board an built the sides an then built the rings an put them on sticks an positioned them in the right spots then took polar fleese an pulled it over an got his shape then put resin on the Fleese an fiberglass an built it up inside the box---


I dont have any pics on how he did it but he does if you want to see pics let me know an I can get them for yea--

Thread Tools
Search this Thread

All times are GMT. The time now is 06:05 AM.