Bose Acoustimass 6 Series I & II Tech 27/01/2014 Audio The Acoustimass 6 bass module seems to be almost the same on Series I and Series II. Here are some pictures of the Acoustimass 6 Bass Module fuse/filter board, which is responsible for the following features: Adaptive Energy Summing Automatic system protection circuitry Here are the links to the user manuals: Bose Acoustimass 6 Series I – User Guide Bose Acoustimass 6 Series II – User Guide