F215 Utilising similar bass loading technology to Funktion-One’s highly regarded F218, with Funktion-One high performance drivers and an overall tuning for strong and accurate impact, the F215 delivers outstanding upper bass performance. It can be used as a main stand alone bass enclosure for smaller systems or combined with other Funktion-One bass enclosures to form the beating heart of larger systems. The vertically stacked arrangement of the two horns, birch ply construction and optional robust wheels make for a durable, convenient and high performance package.