As a live sound company, what do you list yourself as in the NAICS (North American Industry Classification System)? I see a few, possible options.
532490 - Audio visual equipment rental or leasing
711110 - Musical theater productions, live / Theaters, live theatrical production (except dance)
711510 - Stage set (e.g., concert, motion picture, television) erecting and dismantling, independent / Lighting technicians, theatrical, independent / Disc jockeys, independent
443142 - Audio equipment stores (except automotive)
532490 - Audio visual equipment rental or leasing
711110 - Musical theater productions, live / Theaters, live theatrical production (except dance)
711510 - Stage set (e.g., concert, motion picture, television) erecting and dismantling, independent / Lighting technicians, theatrical, independent / Disc jockeys, independent
443142 - Audio equipment stores (except automotive)