September 4, 201411 yr Author how much does redrock charge for testing?Cheap enough that any manufacture in their right mind uses him. Ones like:a/d/s/, Alpine, American Bass, American Speaker Box, API, Artistic Audio, Artison, AudioVox, Audix, Autotek, Blaupunkt, Cerwin Vega, Crossfire, Daichi, DEI, Directed Electronics, Fishman, General Motors, Harmon, Icon, Innovative Fluidics, MB Quart, MTX, Niles, OEM, Orion, OZ Audio, Paramount, Phoenix Gold, POLK, PPI, PRC / Solus, PRECOR, Pyle/Klipsch, Rockford, RME, Russound, Seas, Sonavox, Stillwater, Titanium Power, Top Source, Triad, Vance Dickason, Washburn, X3There is a reason people say he's one of if not the best in the world.
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