From the creators or TurboBass Express. TurboBass Litre to Cubic feet converter allows you to convert Litres to Cubic Feet or Cubic Feet to Litres. Very simple to use, this application will come in handy when designing cabinets. Allowing you to convert volumes as loudspeaker manufactures may specify either Litres or Cubic Feet. This application allows precise conversion so as to ensure your loudspeaker box designs are accurate to the latter.