Step 4: Time to Get Glassy

Fiberglass application with chopped strand mat is pretty easy, but it can get kinda messy if you aren't at least a little bit carefulĀ 
For now, we will just apply a relatively thin shell of fiberglass to the outside. We'll then remove the cardboard from the inside, and build up thickness on the inside of the box [so that it still fits where you intended it to go]

A few suggestions -

1. Don't touch the resin with bare hands [if you do you can remove it with acetone, but best to avoid touching it] some people will wear gloves. I prefer the dexterity of glove-less hands, and think that rubber gloves are wasteful, so I just avoid touching the resin - if you use a chip brush, it isnt that difficult to keep your hands clean of the sticky stuff.

2. Take your time - mix up small batches of resin until you have a better idea of how much you'll need [there is nothing worse in my opinion that having a half cup of resin harden in the cup - haste makes waste, and I hate wasting stuff]

3. Put down some cardboard or newspaper to catch drips

4. Read the directions on the resin for mix ratios - if you have a scale capable of weighing ounces, it will help your proportions be more accurate
Great Instructable, I really appreciate high quality images. It annoys me to no end when people do not take the time to capture well lit, in focus, and relevant images. <br>Kudos, your good work is appreciated.
very nice and very well builtand a great alternative to fiberglass building bass box. <br> <br>I think you should have used MDF as a main support for your box building. Cardboard is a great idea. I used to build costume box and we used to use Plyboard for full on speaker box housing or MDF for small costume builts. <br> <br>If you want to make a costume look, cut the front off, screw some MDF 1x2 for structure, cut and router a ring to hold the bass and more MDF to make holding structure, bring the ring out alittle to make it more costume. Take an old shirt *color doesnt matter as long as it doesn't have holes* stretch it out on the MDF frame from the ring to the fiberglass wall dont stretch it to much, just enough to give you a nice bounce back when you tap it, Nail it on then drip resin on it, lay 3 layer of fiberglass and then bondo it, sand it smooth and test fit. <br> <br>It gives it a more costume look to the build. Stands out more compare it to a flush look. Also if you want play around with the direction the bass is pointing. If you up for acouple days worth of work you can make hit the way you like it by using direction to make it more acustic :) <br>
Thanks for all the suggestions, but my goal was to keep it flush and not visually stand out - If you have a chance, read the first couple sentences of my write-up and I think you will understand what I was trying to accomplish and why I built it the way I did
Great 'ible. <br> <br>Well documented and explained, although from an audio perspective, when making sub boxes, you need to pay closer attention to the recommended volume of the driver (speaker/woofer), and either find a volume to put the box that will fit, or you can find a driver that requires less volume. Also, the volumes can differ for each driver based on whether you install it in a sealed or ported enclosure - and yes, filling with dacron or the like helps with sound regardless too. <br> <br>Either way, this is a fantastic lesson in how to make a custom fibreglass enclosure. <br> <br>Thanks :)
I am certainly not an audiophile, so I'm curious to know what the margin of acceptable error would be in terms of sub box volume - and there being a noticeable change in perceived bass quality. <br> <br>I have heard that the amplifier that you are using can make a big difference in sound quality as well... It would be nice to know how much perceived difference there is as a result of changing a few different factors. <br> <br>I have MB Quart component speakers in the doors and backseat, but to be honest I have a hard time hearing the difference between good speakers and great speakers. There are sooo many variables, and it seems like the importance of some aspects get more attention than others. <br> <br>You seem to know your stuff, so if you can shed any light on the matter I would appreciate it. <br> <br>Thanks :) <br> <br>
Congratulations for this work. The idea of using cardboard to perfect fit the car space is excellent. The crafting stesp are well explained and the final finishing is very good. <br>
Final product looks great! Basic build, nothing unneccessary and it's to the point. I like the stock look.
Nice and clean, think mine is the polar opposite with the not so blending cheetah skin. Yours is what I usually do, excellent craftsmanship!

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