Abstract: A strap assembly designed to support a musical instrument or other electrically powered device on a person and including a body having an elongated configuration including a hollow interior extending along at least a majority of the length of the body, wherein a plurality of electronic components are designed and structured to enhance, supplement and/or transmit the sound or other output from the supported instrument or device. The body includes a plurality of access openings disposed in aligned relation to at least some of the plurality of electronic components so as to provide access thereto by the person on which the support strap and instrument are mounted so as to facilitate operative manipulation of the components during operation of the supported instrument.