Sure. Rough example - Just charge enough in the 'up front' payment to cover most of his initial/purchase/dealer cost. For example - dealer cost on a pair of 10K speakers = 5k. The dealer could charge 4k up front, then charge the $100/month for a 3 year lease. His revenue = 7600 after 3 years, whereupon he gets the speakers back (sells them for 4-5K used/demo) or offers them to the lessee for around the same amount.
Should manufacturers lease speakers?
Given the turnover of equipment, maybe it would make sense for manufacturers or dealers to (profitably) lease speakers (or other components for that matter) with an option to buy? I certainly would be willing to pay to live with something (espescially something expensive) for a year or so knowing I could return it without the hassle of selling.