An adaptive electropneumatic horn system include an acoustic sound wave generator including an acoustic duct chambering system. The Acoustic sound wave generator receives compressed air remotely from a compressor member to produce sound and propagate the same externally. A horn mounting system enables ready attachment and fitment of the system to a remote consumer-desired location and is adaptive to constraining geometries and locations greatly spacing the acoustic sound wave generator from the compressor member, and as a result a plurality of fitment features provided in the horn mounting system allow positioning to a user's preference, within increased safety and reliability. An adaptive mounting bracket member additionally securely receives the air compressor unit.