Quality reduction when downloading

[mikechuck]

Hello,

I am using sequest to download images from a server. I have compared the quality of the image on the server to the one downloaded, and it is noticeably worse. I am connecting with sequest, and doing the actual downloading (streaming) with Node File System (fs.createWriteStream).
Would this quality reduction be because of sequest's connection, or the way node File System handles the data?

Also, I was reading about how the more times you encode a file, the more loss in quality you get. Can I disable encoding for my sequest connection, as well as the fs.createWriteStream and pipe() method?

Thanks!
Michael