Most speaker boxes are either fiberglass mat, or MDF construction. MDF while easy to work with and achieve good results, lacks the custom touch. Fiberglass allows you more freedom to do what you want. In this guide we are are building a simple box to show the process of working with speaker rings and glass mat. Many of the same steps apply for a built in sub woofer box. Start by cutting out a MDF base for your new enclosure. If you are building a built in box, this does not apply to you. Once you have your base, you need to figure out how you want to aim your speaker. How you aim them depends on the type of speaker and personal preference. Once you know how you want to aim the speaker you can start cutting and gluing dowels to hold the speaker rings in the correct orientation. These dowels only need to be strong enough to hold the rings until your first resin application dries. Make your enclosure the correct size to meet the volume needs provided by the speaker manufacturer.