Model 877-858
Quadraphonic Express™ PRO
12-Volt 153 Decibels Hz

When a vehicle owner demands the powerful sound of a truck train horn, go no further, QUADRAPHONIC EXPRESS is the horn to choose. The four (4) metal trumpets produce a ULTRA powerful train horn sound that will be heard! QUADRAPHONIC has a heavy-duty mounting base which is constructed of solid steel to help prevent vibration. The horn is a bright triple chrome finish which means you will have a horn that looks as good as it sounds. Comes with mounting hardware and 10 feet of 1/4 inch O.D. nylon high-pressure hose.

The on-board air system provided is designed to produce a large volume of high-pressure air to power the QUADRAPHONIC EXPRESS PRO TRAIN HORN and includes everything necessary for a professional installation. The compressor has a heavy-duty 12-volt motor that is balanced to precision. There are 4 heavy rubber bushings mounted into the compressor base plate to virtually eliminate vibration. For surface mounting of the compressor, there is an extended length stainless steel high-pressure hose that connects the compressor to the 2.5-gallon metal air storage tank. Other features of the QUADRAPHONIC EXPRESS PRO includes; the tank has a built-in pressure switch, manual water drain, pressure gauge, pressure relief valve and brass fittings. Kit also comes with mounting hardware, 10 ft. of flexible high-pressure hose and 20 ft. coiled filler hose with quality brass fittings.