Device to be mounted on a roll-up cover installation , said roll-up cover installation being of the type comprising: - a support structure for the constraint of said cover installation to a fixed external structure, - a tubular shaft supported by said structure , - means configured to cause the rotation of said tubular shaft , - a sheet to be wound on said tubular shaft and to be unwound from this, characterized in that the device comprises a casing which is configured to be removably inserted and housed in said tubular shaft at an opposite end compared to that in which are housed said means configured for causing the rotation of said tubular shaft , the device further comprising the following components that are arranged and accommodated inside said casing : - at least one amplifier intended to be connected with at least one acoustic diffuser and configured to amplify the audio signals received at the input and for outputting the audio signals thus amplified to said at least one acoustic diffuser , - at least one receiver or transceiver which is connected to said amplifier and which is configured to receive from the outside the audio signals to be amplified by means of said at least one amplifier . - a unit for the control and command of the reproduction of the audio signals received by said receiver or transceiver , said amplifier and said receiver/transceiver being connected and/or incorporated in said control and command unit , - at least one power supply for supplying electrical energy to said control and command unit , to said receiver/transceiver and to said amplifier said device further comprising: - means for securing said casing to said outer support structure , means suitable to be interposed between said casing and said tubular shaft and configured for allowing said casing to support said tubular shaft so that said tubular shaft rotates around the its axis while said casing remains fixed. - a support structure for the constraint of said cover installation to a fixed external structure, - a tubular shaft supported by said structure , - means configured to cause the rotation of said tubular shaft , - a sheet to be wound on said tubular shaft and to be unwound from this, - at least one amplifier intended to be connected with at least one acoustic diffuser and configured to amplify the audio signals received at the input and for outputting the audio signals thus amplified to said at least one acoustic diffuser , - at least one receiver or transceiver which is connected to said amplifier and which is configured to receive from the outside the audio signals to be amplified by means of said at least one amplifier . - a unit for the control and command of the reproduction of the audio signals received by said receiver or transceiver , said amplifier and said receiver/transceiver being connected and/or incorporated in said control and command unit , - at least one power supply for supplying electrical energy to said control and command unit , to said receiver/transceiver and to said amplifier said device further comprising: - means for securing said casing to said outer support structure , means suitable to be interposed between said casing and said tubular shaft and configured for allowing said casing to support said tubular shaft so that said tubular shaft rotates around the its axis while said casing remains fixed. <EOS>