S15LX-N is a 15" Coaxial musical instrument speaker well matched to acoustic instruments of all types, electric bass, or synthesizers. The red dust cap indicates a Coaxial driver that includes a 15" cone for lows and mids, a crossover network, and a 1" titanium diaphragm compression driver for extending the high frequency response. It has damped spring loaded handles, sturdy rubber feet, and a 15 mm thick birch plywood cabinet covered in our unique Nebula finish making it a very portable, and durable speaker enclosure.