A detachable knob for controlling at least one function of a loudspeaker , wherein: the detachable knob is configured for detachable attachment to the loudspeaker by means of a magnetic attachment force, wherein the detachable knob comprises a neodymium magnetic element configured to provide the magnetic attachment force such that the magnetic attachment force is stronger than gravity thereby allowing the detachable knob to be attached to any vertical surface exhibiting magnetic properties, the detachable knob is configured to be communicatively coupled to the loudspeaker to control the at least one function of the loudspeaker when the detachable knob is detachably attached to the loudspeaker , the detachable knob is configured to be communicatively coupled to the loudspeaker to control the at least one function of the loudspeaker when the detachable knob is detached from the loudspeaker , and wherein the detachable knob comprises: a communications interface configured for wireless communication with the loudspeaker , an orientations sensor configured to determine a user input to the detachable knob such as a tap, press, and/or orientation of the detachable knob, and a feedback apparatus configured to provide the user with a visual, tactile and/or audio feedback from the detachable knob of the controlling of the at least one function of the loudspeaker , and/or how much the detachable knob has been rotated. the detachable knob is configured for detachable attachment to the loudspeaker by means of a magnetic attachment force, wherein the detachable knob comprises a neodymium magnetic element configured to provide the magnetic attachment force such that the magnetic attachment force is stronger than gravity thereby allowing the detachable knob to be attached to any vertical surface exhibiting magnetic properties, the detachable knob is configured to be communicatively coupled to the loudspeaker to control the at least one function of the loudspeaker when the detachable knob is detachably attached to the loudspeaker , the detachable knob is configured to be communicatively coupled to the loudspeaker to control the at least one function of the loudspeaker when the detachable knob is detached from the loudspeaker , and wherein the detachable knob comprises: a communications interface configured for wireless communication with the loudspeaker , an orientations sensor configured to determine a user input to the detachable knob such as a tap, press, and/or orientation of the detachable knob, and a feedback apparatus configured to provide the user with a visual, tactile and/or audio feedback from the detachable knob of the controlling of the at least one function of the loudspeaker , and/or how much the detachable knob has been rotated. a communications interface configured for wireless communication with the loudspeaker , an orientations sensor configured to determine a user input to the detachable knob such as a tap, press, and/or orientation of the detachable knob, and a feedback apparatus configured to provide the user with a visual, tactile and/or audio feedback from the detachable knob of the controlling of the at least one function of the loudspeaker , and/or how much the detachable knob has been rotated. <EOS>