There are many designs that can work well for DIY speaker kits, and the best design for you will depend on your specific needs and preferences. Here are a few factors to consider when choosing a design for a DIY speaker kit:

1. Purpose: What do you want to use the speaker for? Do you need a portable speaker for outdoor use, or a larger, more powerful speaker for home theater use?
2. Speaker components: Different speaker kits come with different components, such as woofers, tweeters, and crossovers. Choose a kit that includes the components you need to achieve the sound you want.
3. Enclosure: The enclosure, or cabinet, that houses the speaker components plays a big role in the overall sound of the speaker. Choose an enclosure that is appropriate for the components and the intended use of the speaker.
4. Budget: Speaker kits can range in price from a few hundred dollars to several thousand dollars, depending on the components and design. Consider your budget when selecting a kit.
5. Experience: If you are new to building speakers, it may be best to start with a simple kit that is easy to assemble. As you gain more experience, you can move on to more complex kits.