What is the reduction ratio of the mulch produced by my Blower Joe SBJ605E? Your Blower Joe SBJ605E has a reduction ration of 16:1, using a high-impact-resistant metal impeller to mulch leaves down to 1/16th of their original size. Related articles What should I do if my Blower Joe SBJ605E gets clogged or jammed? How do I prevent the power cord from disconnecting? What is the best way to clear a path with my Electric Snow Blower?