There are several challenges that you may encounter when building your own speakers. Some of these challenges include:

1. Choosing the right components: You will need to choose the right type of drivers (woofers, tweeters, etc.), crossover components, and enclosure materials in order to build a high-quality speaker.
2. Designing the enclosure: The enclosure (or cabinet) plays a critical role in determining the overall sound quality of the speaker. You will need to carefully design the enclosure in order to achieve the desired frequency response and bass output.
3. Assembling the components: You will need to be able to properly assemble the various components of the speaker, including the drivers, crossover, and enclosure. This may require some knowledge of woodworking and soldering.
4. Tuning and testing: Once the speaker is built, you will need to fine-tune it in order to achieve the desired sound. This may require a lot of trial and error, as well as the use of specialized testing equipment.
5. Quality control: Building your own speakers requires a high level of attention to detail in order to ensure that the final product meets your quality standards.

Overall, building your own speakers can be a challenging but rewarding experience. It requires a combination of technical knowledge, creativity, and patience.