Patent ID: 8761414

Claim:
A reproduction device comprising: an information reading unit that reads sensitivity information from a storage unit of a headphone device, wherein the headphone device comprises a speaker configured to reproduce an electric signal of an audible signal, wherein the storage unit stores the sensitivity information for the speaker; an adjustment unit that adjusts an output level of the electric signal supplied to the headphone device; and a control unit that reads the sensitivity information from the storage unit via the information reading unit, and controls the adjustment unit such that the electric signal lies in an allowable maximal output level based on the sensitivity information; and perform connection switching for switching a connection state of a left (L) channel and a right (R) channel of the reproduction device between a first state and a second state, wherein the first state corresponds to a connection of the control unit with the storage unit of the headphone device and the second state corresponds to a supply of the electric signal of the audible signal to the headphone device.