A combined headphone set including a speaker assembly. A data storage accelerator includes one or a plurality of high speed data compression encoders that are configured to simultaneously or sequentially losslessly compress data at a rate equivalent to or faster than the transmission rate of an input data stream. Next, the error ratio of the data block is determined. A pressure piece is placed on the clamping claw and its underside facing the cutting plate is provided with a cam, which is in contact with the clamping trough and the clamping claw pulls the pressure piece toward the clamping screw. The player presses the \u201cmade\u201d or \u201cmissed\u201d basket buttons when a shot is made or missed.