FUSION - SG-DA61500 Signature Series 1500W - 6 Channel Amplifier - 010-02161-00. Introducing an impressive new addition to Fusion's Signature Series marine amplifier range: the SG-DA61500.. Fusion Signature Series amplifiers are purpose-built for the marine environment. Boasting some of the most impressive environmental protection available, they deliver a Signature performance on the water like never before.. One of our most efficient, stunning and powerful marine amplifiers, the SG-DA61500 als