What did Jeff Rowland mean by a "new module?"

A couple of years ago, I sent a Consonance preamp to the
Rowland Group to be checked out. Jeff got on the phone with me (I know I did not deserve his personal attention) and said he put a "new module" in the Consonance--and this module would bring my older preamp up to date.

What is "the module?" Electronics? How did a new one bring this older piece of equipment up to date? Thanks.