Unfortunately, Paul told me I bought his last one. You will have to find a used one. I mate mine with the TAD 1000 monoblocs, but formerly used the TAD 60, which is equally good! I have also used it with Moscodes, Nuforce and they all mate equally well. I compared it with the Aesthetix Calypso, which I also own, and it is probably as good, despite the 4-5 X price differential. For about $750 used, this is an incredible bargain, particularly since the stock tubes are so good. Usually one has to replace stock tubes, so this is a further saving. If paul could figure out a way to have it built again, he'll make a killing, although he'll have to raise the price, since this piece is so outstanding.
TAD Rocks Big Time
Some people in the Audio Industry are just consistently stars. Every time I have a question for Paul Grzybek, he answers instantaneously. Always practical, always helpful. He makes an amazing product. I put the TAD 150 Signature preamp up there as the biggest bargain I have ever bought in my 40-odd years of audio. But there is another point to this thread: if you buy a quality audio product, such as this, believe the seller. I thought I would improve the already great sound, as we nuts tend to do, by buying very expensive NOS 12AT7 tubes to replace the stock ones. Mistake. One bad tube, overall sounded worse than the stock ones. Asked Paul. Told me that the stock ones took him 3 years of research to uncover and they were sleepers, but mighty good. He is dead right. Took me a few hundred dollars to believe him. Advice to the rest of you: Believe the vendor when he's as decent and straight as Paul. More money is not always better. Duh, trite, but worth re-iterating.