Device for reproducing an audio signal (S A), - with a first Interface to connect an energy storage device, - with a second interface to connect a loudspeaker, - with an amplifier connectable to the second interface, wherein the amplifier Is configured to amplify the audio signal (S A), wherein the amplifier is connectable to the energy storage device for operation, - with a control device, which is connected to the first interface and to the amplifier, - the control device is configured to operate a normal mode (M N) and an energy saving mode (M S), wherein in the energy saving mode (M S) power consumption from the energy storage device for reproduction of the audio signal (S A) is reduced as compared to the normal mode (M N), - the control device is configured to reduce a bass frequency component of a frequency spectrum (X(f SA)) of the audio signal (S A) and to output the audio signal (S A) with the reduced bass frequency component in the energy saving mode (M S), - the control device is configured to determine a charge state of the energy storage device, - the control device is configured to control the reduction in the bass frequency component based on a decrease In the charge state of the energy storage device; characterized in that the control device is connected to a database with stored audio files (A 1, A 2, A 3), an energy value (E 1, E 2, E 3) is stored for each of said audio files (A 1, A 2, A 3), wherein the energy value (E 1, E 2, E 3) is based on the bass frequency component of a frequency spectrum (X(f A1), X(f A2), X(f A3)) of the respective one of said audio files (A 1, A 2, A 3), the control device is configured to determine an energy threshold (th E) based on the charge state of the energy storage device, the control device is configured, for the purpose of controlling the bass frequency component, to ascertain one of said audio files (A 1, A 2, A 3) to be output based on the associated energy value (E 1, E 2, E 3) of the one of said audio files (A 1, A 2, A 3) and based on the energy threshold (th E), and to output the one of said audio files (A 1, A 2, A 3) as the audio signal (S A). - with a first Interface to connect an energy storage device, - with a second interface to connect a loudspeaker, - with an amplifier connectable to the second interface, wherein the amplifier Is configured to amplify the audio signal (S A), wherein the amplifier is connectable to the energy storage device for operation, - with a control device, which is connected to the first interface and to the amplifier, - the control device is configured to operate a normal mode (M N) and an energy saving mode (M S), wherein in the energy saving mode (M S) power consumption from the energy storage device for reproduction of the audio signal (S A) is reduced as compared to the normal mode (M N), - the control device is configured to reduce a bass frequency component of a frequency spectrum (X(f SA)) of the audio signal (S A) and to output the audio signal (S A) with the reduced bass frequency component in the energy saving mode (M S), - the control device is configured to determine a charge state of the energy storage device, - the control device is configured to control the reduction in the bass frequency component based on a decrease In the charge state of the energy storage device; characterized in that