Eu comprei umas Creative Pebble (v2) para um portátil que tenho aqui em casa e estou bastante satisfeito, excepto pelo facto da alimentação ser feito através de um cabo USB que ligas ao portátil, para além do jack das próprias colunas.

Fora isso, são pequenas, baratas e dão bom som. Aparentemente, há uma nova versão (v3) que suporta Bluetooth. Não são nada de espectacular mas para o preço que são (30-40€) não tenho razão de queixa.

Links:

• Amazon - v2
• Amazon - v3

Em termos de qualidade de som, uma pesquisa feita bastante à pressa levou-me a este site, que as distingue desta forma:

According to expert reviews, the Creative Pebble V2 is better for bass performance, with enhanced bass reproduction and passive radiators that give it more depth and impact. It is a good option for those who enjoy music with thumps and low frequencies. On the other hand, the Creative Pebble V3 has an improved built-in 2" full-range drivers and passive radiators, giving you richer and louder audio with enhanced bass reproduction.

It is better suited for those who prefer a cleaner and softer bass, and a brighter and clearer sound signature with more emphasis on treble and vocals.

Both speakers offer impressive audio performance for their size and price range, with slight differences in their strengths and weaknesses. The Pebble V2 is praised for its crystal clear and bright sound, with good treble and decent bass, making it a good option for general use. The Pebble V3, on the other hand, is noted for its reliable and clear audio, lack of distortion at high volume, and soft, clean bass, making it a good option for those who enjoy music with main vocals and musical instruments.

However, it may struggle with music that has a lot of background vocals or airy vocals.

Overall, the Creative Pebble V2 is better for those who prioritize bass performance, while the Creative Pebble V3 is better for those who prioritize a brighter and clearer sound signature with more emphasis on treble and vocals. It ultimately depends on personal preference and specific needs when choosing between the two models.

Se fosse hoje, provavelmente ia para a v3 só mesmo porque não gosto que os graves se notem demasiado. Se não queres muito saber disso e/ou do bluetooth, então eu ia para a v2.

EDIT: Sugiro, obviamente, que faças uma pesquisa mais detalhada sobre estas colunas. Afinal de contas, eu sou só um gajo na internet, não sou nenhum especialista na matéria.