The Scoop on download accelerators
Lets say you have a broadband connection that gives you top download speed of 700kbs per second... top speed.
No matter what download tool you use, you will not be able to surpass that cap.
However, if the server your downloading from only serves the the file at 100kbs per second, per connection, that is to say that the sever will cap the speed per connection to reserve bandwidth for other users, you could use a download accelerator to open, say 5 connections to that file, thus giving you download speeds of 500kbps per second.
Or
Some download accelerators/managers will let you specify more that one server with the file resides, and will download parts of the file from many different servers. This method is the easiest way to reach the top speed of your connection.
Personally I find download accelerators a wast of time these days.
Back in the dialup days these tools were a god send.. now.. really who needs em.
I mean most servers are now using fiber, and most user have some type of broadband connection.
A couple of tips for you that some of you old dogs will think is crazy.
Years ago, we were told to pick mirrors closest to your physical location to get optimal speeds. This was because years ago most people used dialup and connections degraded after traveling through miles and miles of copper lines.
However today the opposite is true.
If you the option of picking a download server in the UK or Australia, or overseas in general, USE IT!! Most of them are are fiber links, and you will have no problem getting your top speed from them.