Yeah...as Jedinite24 knows it says "SA-93" on one of the S-33 circuit boards, and as far as I can tell it is EXACTLY the same preamp (dual mono balanced with an isolated double transformer power supply on the same chassis), which means if mine breaks I can (hopefully) send it to a Vincent repair shop. I have no idea why Kavent and Vincent were the same things with different cosmetics...some marketing issue maybe, but still a little weird.