Sure you can Wiskers. The 585c units were shipped with the same XHS-9-20-T (or more recently the XNT-9-20-T) transducer that the Matrix 87c units were shipped with. We use only one element inside of our 200/83kHz transducers to produce both transducer beams. The 585c only makes use of the 200kHz frequency while the Matrix 87c uses both. Saves us from having to produce two different transducers which helps keep our (and your) cost down and makes it harder for us here to get the wrong transducer in the box when we are packing it.