Aget fetches HTTP URLs in a manner similar to wget, but segments the retrieval into multiple parts to increase download speed. It can be many times as fast as wget in some circumstances.
If you're downloading a file of size less than 512K, I suggest using small segments, i.e 4-5 however, if you are downloading large files, you can increase the segmentation Aget first sends a HEAD request to retrieve the length of the file, and divides it into equal segments according to the number user has requested. Then for each segment, it connects to the server and gets only the part, which it is to download. Therefore, if you're downloading a small file, it is suggested that you decrease the number of segmentation, likewise, if it's a large file, you're urged to increase the number of threads.