There seems to be some persistent confusion regarding the TRL "Reference" pre-amp (aka GTP-4). No participant in this thread, including myself, has heard it. Paul W. said the last one he made was in the late was in the late 90s. It was a two chassis number where the pre-amp section weighed in at 90 lbs and the power supply weighed 140 lbs. He did make several non-reference but upper level pre-amps from 2000-2, including two multi-channel pres for home theater applications, and another 2-3 that were specifically designed to be used with the Magico 3s. The later entity used the 6080s due to the requirements of the Magico x-overs and were a flawed entity according to Paul. That is what your uncle bought and sold Don.
As for comparisons, the only person who owns an actual Reference TRL pre-amp (circa 1994) has a top dollar system with state of the art conditioning technology in tow. He has compared the GTP-4 to many pre-amps, including the CF-080, Light Speed Attenuator, The Truth, etc. It was a massacre. Everything else "sounded like HiFi." The only pre-amp to better the GTP-4 in his system is the current generation Dude. It smoked it.
The Dude abides.
As for comparisons, the only person who owns an actual Reference TRL pre-amp (circa 1994) has a top dollar system with state of the art conditioning technology in tow. He has compared the GTP-4 to many pre-amps, including the CF-080, Light Speed Attenuator, The Truth, etc. It was a massacre. Everything else "sounded like HiFi." The only pre-amp to better the GTP-4 in his system is the current generation Dude. It smoked it.
The Dude abides.