Cayin TA 30 vs. PrimaLuna Prologue

The Cayin and Primalunas look very similar and probably have quite a few things in common as far as parts go too.
The major difference between the two is that the Primalunas come with an autobias feature and the Cayins do not. Depending on who you ask, this autobias circuit improves, degrades, or has no effect upon the sound (I've never compared the two side by side myself).
Also, the Cayin can be biased to accept lots of different tubes, such as EL34, 6CA7, KT88, KT90, 6550, etc, while the Primaluna are set up so the Prologue one can only take EL34/6CA7, and the Prologue two KT88/6550. I own the Cayin and like the fact that I can try so many different tubes.
And finally, yes, there is a US modifier of the Cayin, Paul G of Tube Audio Designs. He no longer deals with the Cayins and has put his own TAD line of products which look very impressive.
Also, just so you know, the price of a modified Cayin and new or used Primaluna is not very close. I paid around six hundred bucks for my modded Cayin, while Primalunas generally fetch close to a grand even when they're used.

That's some bad info on the Prologue 2. The adaptive auto bias on the Prologue 2 allows you to use KT88, 6550, KT90, EL34, 6L6GC, 7581A, and KT66 tubes.

Bad info on the Prologue 1 also, you can also use 6L6GC, KT66, or 7581 tubes. Go to the Upscale audio website for the real info.

I think Paul Gyrzbek makes a great product. I have the TA-30 and the TAD-60 and I think they are the proverbial screaming bargains. (I also have an Art Audio Jota as a comparison - yes the Jota is better at many multiples of the price of the TAD-60). As for service, Paul is a customer's dream. Accessible, responsive, a nice guy. I have nothing but the highest praise for him.