Yes, you can splice two wires together to connect to a speaker. There are several methods you can use to splice wires together, including:

1. Twist the wires together: Simply twist the two wires together tightly, making sure that the wire strands are all aligned and no stray strands are sticking out. You can then cover the splice with electrical tape or heatshrink tubing to hold it together and insulate it.
2. Use a wire connector: You can use a wire connector, also known as a wire nut, to splice the wires together. These connectors are designed to hold the wires together and provide insulation.
3. Solder the wires together: You can also solder the wires together using a soldering iron. This method provides a more permanent and secure connection, but it requires a bit more skill and equipment.

Regardless of which method you use, be sure to use the appropriate wire gauge for the speaker you are connecting. It is also important to follow all safety guidelines when working with electrical wiring.