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.