I think it was mfg from about 1999 until about 2004, maybe a little later. One of mine appeared new and the box had a sticker on it that said reduced to 299 dollars. I found an old SOS review but their only comment on the sound is that its better than the preamps on most mixers. Not exactly a robust endorsement. Mix magazine has it on an old list of high end preamps but doesnt comment on the sound. In my not so analytical listening tests I found it to be clean, clear, low noise, but with an ability to make things sound bigger than tje other preamps I have acces to. It doesnt have a real character just an ability to ever so slightly enhance some sounds. Nothing that will floor you though. If I had paid 300 dollars Id be dissapointe but for what I paid Im happy.