There are a few factors you should consider when selecting components for your DIY speakers:

1. Sound quality: Choose high-quality components that will produce clear, full-range sound. This includes selecting a good quality tweeter, mid-range driver, and woofer.
2. Size and power handling: Make sure that the components you choose will fit in your speaker enclosure and can handle the power that your amplifier can deliver.
3. Impedance: Make sure that the impedance of your speakers is compatible with the amplifier you are using.
4. Sensitivity: Consider the sensitivity of the components you choose. Higher sensitivity means that the speakers will be louder at a given power level, but they may also be more prone to distortion at high volumes.
5. Cost: Determine your budget and try to find components that offer the best value within that budget.

It can also be helpful to read reviews and compare the specifications of different components to help you make an informed decision.