Actually, they're from a company named Phonic which is a company from overseas. They make high quality Pro audio gear that can go against alot of Qsc mid- priced amps without costing as much. Also I finished the enclosures last night. I used them with an active crossover where they'll reproduce 40Hz-100Hz. They did extremely well for musical instrument speakers. They didnt color the sound up at all!!!! They sound the best when I put both cabinets side by side, where the low bass became very pronounced. I think that's the way i will set them up whenever I have a gig with a band.I'll include the link to Phonic's website where you can see the amps. When you get there look up amps: Max2500 And XP3000