Though the IPad certainly has a nice pair of built-in speakers, these are not exactly great. If you want to share your personal videos and audio with friends then you need to plug in external speakers. The number of iPad speakers available today is not very high but a few stand out. iLuv iSP 100BLK Mini Portable Speaker that costs about 20USD is an option worth checking out.
This speaker can be run on 3 AAA batteries. These speakers offer good but not spectacular sound and come with a protective case and are a good option for those with a limited budget.
Chill Pill iPad Speakers are another good option and are priced at USD 49.95. These speakers are pretty good and are small in size. Despite being only 2 inches by four inches in size, these speakers pack a pretty heavy punch. They can be clicked together magnetically and so are also very portable. Their batteries can power up these speakers for six plus hours and the speakers are also pretty cool looking as well. If you are looking for speakers that are very portable, then these are the one that you should be looking at.
Bose Companion 2 Series II is of course something that not everyone can afford as they are priced at about 99USD. They provide all the quality that you would associate with Bose but they are also not the best looking speakers. However, they are very powerful and they offer excellent sound quality and are a wonderful option for those who are looking for high quality iPad speakers.
Sony Ericsson Wireless Speakers are very cool that are not very expensive and are priced at an affordable 49.99USD. If you are looking for speakers that are shaped in the form of a ball and which incorporates very funky designs then this is the speaker that you should be looking for.