What kind of sound can you expect from these mini systems? With AC current, unlike the battery dependent boombox, these audio systems produce enough power for a clean crisp sound. With 20 watts per speaker channel you can produce more than enough volume for a fifteen by fifteen foot room.
If you are planning on a larger venue for your system, you may require more than 50 watts per channel. There are models that produce up to 300 watts per channel but this might be overkill for your particular set up. 100 watts should be enough wattage for most applications. However, since the speaker's mini size can limit the depth of the bass, more power can mean boost this deficit and offer a better sound.