Paul Weitzel from Tube Research Labs

It is shocking indeed. Thanks to Paul Stein for letting me know at Capital Audio Fest. My heart is sad.

My first serious audiophile system was anchored around TRL/CRL - source, amp, wires and speaker. I have a speaker hand built by him. It took him 18 months to do it and the results are stunning. No, it is not about frequency response or resolution but sounding "right".

We often talked about "life" or spirituality and shared common values. I learnt a lot about his secret "lower the noise floor" - but not in the way we measure things - THD, but the way we listen to music. Our ears are better judge.

We did a gig together - TRL 600 amps based on NCore 1200 modules and after many tweaks - he said, "it sound ok" ... he was years ahead of most people in the audio industry ... yes a lot of people have implemented and love those amps ... just because they have not heard the TRL Samsons. 

RIP Paul, you will be missed.

Your friend 
Sunil

I just discovered this thread.  I am imressed that many others had the same wonderful experience that I did!  I really miss him too.

i just loved the guy.  had him to the house multiple times; along with Brian.  Now, i own a set of the amps and one of them does not work...and i can't find anyone capable of fixing them .  does anyone know of an operating manual for them?  or someone that can fix them?  I am desperate.  

Contact Bob Backert of Backert Audio or Bill Thalmann of Music Technology.

No operating manual is available in terms of a schematic etc... A good tube tech should be able to fix most issues pretty easily. Paul’s design is rather straight forward for the most part. It is also very robust so I think the required fix should be straight forward like replacing a resistor and such. The only possible area of difficulty would be if the issue is in the tube voltage regulation portion of the power supply. His design is tricky to dial in and set up initially. This is not a straight forward portion of the amp and one that can be very tricky.