There are many options for building your own speakers at home. Some common materials that people use include:

1. Cardboard or paper: These materials can be used to make lightweight, portable speakers that are easy to build.
2. Wood: You can use wood to build more permanent, sturdy speakers. You can use plywood or MDF (medium density fiberboard) for the cabinet, and a variety of wood types for the speaker cone.
3. Plastic: Plastic can be used to make lightweight speakers that are easy to work with. Acrylic or polycarbonate plastic can be used to make transparent speaker cabinets, which can be a unique visual feature.
4. Metal: You can use metal to build sturdy, durable speakers. Metal cabinets can be more expensive and difficult to work with, but they can provide excellent sound quality and a sleek, modern appearance.

There are many different designs and approaches to building your own speakers, so you have a lot of flexibility in terms of materials and construction techniques. Some people build speakers from scratch, while others modify or repurpose existing speakers. You can find detailed instructions and resources online to help you get started.