Classic 2G
Terminology
By iPod classic 2g we mean the second iPod with the 'classic' name. It was smaller than the 160GB version of the Classic 1g and was only available with 120GB storage.
Components
Almost exactly the same hardware as the Classic 1G, except that region A is populated. This presumably communicates with the new headphone/remote that Apple chose for this device to support.
Helpful pages
Teardowns: