"Soapbar" Pickups are so-named due to their resemblance to a bar of soap and originally referred to the Gibson P-90 guitar pickup. The term is also used to describe any pickup with a rectangular shape (no protruding screw mounting "ears" like on P, J or MM pickups) and no visible pole pieces. Most of the pickups falling into this category are humbucking, though a few single-coil soapbar designs exist. They are commonly found in basses designed for the rock and metal genres, such as Gibson, ESP Guitars, and Schecter, however they are also found on 5- and 6-string basses made popular by jazz and jazz fusion music, such as Yamaha's TRB and various Peavey model lines. 'Soapbar pickups' are also called 'extended housing pickups', because the rectangular shape is achieved simply by making the pickup cover longer or wider than it would have to be to only cover the pickup coils, and then the mounting holes are recessed inside these wider dimensions of the housing.
Since there are so many digital pianos worthy of your attention in this catalog, you may want to narrow down your choices using some of the search options on the sidebar. For example, if you select stage digital pianos under the category section, you'll be presented with all the digital pianos that were made for the stage. Once here you have the opportunity to drill down even further and can search by topics like number of keys, MIDI/USB Connections or by whether or not the digital piano has built-in speakers.