The type of enclosure you should use for your DIY speakers will depend on the design of the speakers and the desired performance characteristics. Some common types of enclosures used for speakers include:

* Bass reflex: This type of enclosure uses a port or vent to augment the low-frequency response of the speaker. Bass reflex enclosures are generally more efficient than other types of enclosures and can produce higher SPL (sound pressure level) for a given input power.
* Sealed: Sealed enclosures provide a tight, controlled environment for the speaker, resulting in accurate and precise bass reproduction. However, sealed enclosures are generally less efficient than bass reflex enclosures and may require more power to achieve the same SPL.
* Infinite baffle: An infinite baffle is a large, non-resonant surface (such as a wall) that is used to mount a speaker. This type of enclosure is generally used for outdoor speakers or in-wall installations, and provides a very simple and unobtrusive way to mount speakers.
* Horn-loaded: Horn-loaded enclosures use a flared opening to improve the efficiency of the speaker and increase the SPL. These enclosures are often used in professional sound reinforcement systems and can produce very high levels of sound. However, they can be complex and difficult to design and build.

There are many other types of enclosures that can be used for speakers, and the best choice will depend on your specific needs and goals. It’s generally a good idea to start by researching different enclosure designs and considering the trade-offs between efficiency, size, and cost.