I need to be plain in my answer to you.
Go to the Bose web site:
They will tell you all about it. There isn't a version of their speakers Acoustimass 15, you must mean 16.
And again, they have all the info you could want to read.
The Tech Source
Home Theaters and more... in Southern California
Bose Acoustimass 15 and
Bose Acoustimass 10?
Also, can anyone recommend a Bose receiver to go with these speakers?